wos_query_refs.bib

@article{ ISI:000457510100050,
Author = {Ikeda, Yuji and Grabowski, Blazej and Koermann, Fritz},
Title = {{Ab initio phase stabilities and mechanical properties of multicomponent
   alloys: A comprehensive review for high entropy alloys and
   compositionally complex alloys}},
Journal = {{MATERIALS CHARACTERIZATION}},
Year = {{2019}},
Volume = {{147}},
Pages = {{464-511}},
Month = {{JAN}},
Abstract = {{Multicomponent alloys with multiple principal elements including high
   entropy alloys (HEAs) and compositionally complex alloys (CCAs) are
   attracting rapidly growing attention. The endless possibilities to
   explore new alloys and the hope for better combinations of materials
   properties have stimulated a remarkable number of research works in the
   last years. Most of these works have been based on experimental
   approaches, but ab initio calculations have emerged as a powerful
   approach that complements experiment and serves as a predictive tool for
   the identification and characterization of promising alloys.
   The theoretical ab initio modeling of phase stabilities and mechanical
   properties of multi-principal element alloys by means of density
   functional theory (DFT) is reviewed. A general thermodynamic framework
   is laid down that provides a bridge between the quantities accessible
   with DFT and the targeted thermodynamic and mechanical properties. It is
   shown how chemical disorder and various finite-temperature excitations
   can be modeled with DFT. Different concepts to study crystal and alloy
   phase stabilities, the impact of lattice distortions (a core effect of
   HEAs), magnetic transitions, and chemical short-range order are
   discussed along with specific examples. Strategies to study elastic
   properties, stacking fault energies, and their dependence on, e.g.,
   temperature or alloy composition are illustrated. Finally, we provide an
   extensive compilation of multi-principal element alloys and various
   material properties studied with DFT so far (a set of over 500
   alloy-property combinations).}},
DOI = {{10.1016/j.matchar.2018.06.019}},
ISSN = {{1044-5803}},
EISSN = {{1873-4189}},
ResearcherID-Numbers = {{Kormann, Fritz/A-5677-2012
   Grabowski, Blazej/D-8430-2012}},
ORCID-Numbers = {{Kormann, Fritz/0000-0003-3050-6291
   Grabowski, Blazej/0000-0003-4281-5665}},
Times-Cited = {{22}},
Unique-ID = {{ISI:000457510100050}},
}

@article{ ISI:000447094500025,
Author = {Liu, Kaimiao and Komarasamy, Mageshwari and Gwalani, Bharat and Shukla,
   Shivakant and Mishra, Rajiv S.},
Title = {{Fatigue behavior of ultrafine grained triplex Al0.3CoCrFeNi high entropy
   alloy}},
Journal = {{SCRIPTA MATERIALIA}},
Year = {{2019}},
Volume = {{158}},
Pages = {{116-120}},
Month = {{JAN 1}},
Abstract = {{Ultrafine grained (UFG) alloys suffer from limited strain hardening
   hence reduced ductility. Incorporation of deformation twinning can
   overcome this limitation. An Al0.3CoCrFeNi high-entropy alloy was
   thermo-mechanically processed to yield a UFG triplex microstructure
   (d(avg): 0.71 +/- 035 mu m) with FCC, and hard B2 and sigma phases. The
   annealed material exhibited an exceptional strength-ductility
   combination with ultimate tensile strength (UTS) of similar to 1.1 GPa
   and elongation of similar to 25\%. Furthermore, the alloy showed
   excellent fatigue resistance with an endurance limit of similar to 0.43
   UTS. Remarkable mechanical properties are attributed to the formation of
   extensive deformation nanotwins and increased dislocation accumulation
   capability. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All
   rights reserved.}},
DOI = {{10.1016/j.scriptamat.2018.08.048}},
ISSN = {{1359-6462}},
Times-Cited = {{11}},
Unique-ID = {{ISI:000447094500025}},
}

@article{ ISI:000449486300023,
Author = {Stepanov, N. D. and Shaysultanov, D. G. and Chernichenko, R. S. and
   Tikhonovsky, M. A. and Zherebtsov, S. V.},
Title = {{Effect of Al on structure and mechanical properties of Fe-Mn-Cr-Ni-Al
   non-equiatomic high entropy alloys with high Fe content}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{770}},
Pages = {{194-203}},
Month = {{JAN 5}},
Abstract = {{Microstructure and mechanical properties of the Fe-Mn-Cr-Ni-Al system
   non-equiatomic high entropy alloys with a different Al content (x = 0-14
   at.\%) were studied in the present work. The Fe40Mn25Cr20Ni15 alloy was
   composed of the face-centered cubic (fcc) matrix phase with a small
   amount of coarse bodycentered cubic (bcc) particles. Addition of a small
   amount of Al (x = 2-6) resulted in an increase in the fraction of the
   bcc phase to 26\% and the formation of fine B2 precipitates within the
   bcc phase. At higher amounts of Al (x = 10 and x = 14) the
   microstructure consisted of coarse bcc matrix grains with the B2
   precipitates inside. The alloys tend to become stronger with an increase
   in the Al content from 0 to 10 at.\%; further increase in Al
   concentration did not influence strength considerably. The alloys
   exhibited pronounced softening with an increase in testing temperature
   from 25 to 400 degrees C-600 degrees C. Ductility of the alloys was high
   enough (>50\%) at all temperatures. A quasi-binary Fe40Mn25Cr20Ni15-Al
   phase diagram was constructed using a ThermoCalc software and a TCHEA2
   database; reasonable agreement between the experimental and predicted
   phase compositions of the alloys was obtained. It was suggested that an
   addition of the strong bcc-stabilizing and compound-forming Al to a
   bcc-prone Fe40Mn25Cr20Ni15 alloy is beneficial for the development of
   the alloys with the disordered bcc matrix and the embedded B2
   precipitates having attractive mechanical properties. (C) 2018 Elsevier
   B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2018.08.093}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
ResearcherID-Numbers = {{Stepanov, Nikita/D-6279-2015
   Stepanov, Nikita/P-7089-2019}},
ORCID-Numbers = {{Stepanov, Nikita/0000-0003-2476-3953
   Stepanov, Nikita/0000-0003-2476-3953}},
Times-Cited = {{8}},
Unique-ID = {{ISI:000449486300023}},
}

@article{ ISI:000457510100051,
Author = {Manzoni, Anna M. and Glatzel, Uwe},
Title = {{New multiphase compositionally complex alloys driven by the high entropy
   alloy approach}},
Journal = {{MATERIALS CHARACTERIZATION}},
Year = {{2019}},
Volume = {{147}},
Pages = {{512-532}},
Month = {{JAN}},
Abstract = {{The discovery of high entropy alloys at the turn of the millennium lead
   to a multitude of investigations of different types, focus and aims.
   With an increased knowledge of the new family of materials, it was
   possible to make a separation into true single phase high entropy alloys
   (HEA) and multi-phase compositionally complex alloys (CCA), which both
   fulfil the initial definition criteria. This review focuses on CCA that
   have been investigated and developed with a mechanical application in
   mind. A special importance is attributed to the mechanical testing
   methods, and priority is given to tensile testing at both room
   temperature and up to 700 degrees C. Precise microstructural
   characterization techniques like transmission electron microscopy and/or
   atom probe tomography ensure the determination of small scale phases,
   which could be overlooked when using only scanning electron microscopy
   and/or X-ray diffraction. Comparison of the investigations that meet
   these criteria are summarized in several tables and figures.}},
DOI = {{10.1016/j.matchar.2018.06.036}},
ISSN = {{1044-5803}},
EISSN = {{1873-4189}},
Times-Cited = {{8}},
Unique-ID = {{ISI:000457510100051}},
}

@article{ ISI:000457665100021,
Author = {Tong, Y. and Chen, D. and Han, B. and Wang, J. and Feng, R. and Yang, T.
   and Zhao, C. and Zhao, Y. L. and Guo, W. and Shimizu, Y. and Liu, C. T.
   and Liaw, P. K. and Inoue, K. and Nagai, Y. and Hu, A. and Kai, J. J.},
Title = {{Outstanding tensile properties of a precipitation-strengthened
   FeCoNiCrTi0.2 high-entropy alloy at room and cryogenic temperatures}},
Journal = {{ACTA MATERIALIA}},
Year = {{2019}},
Volume = {{165}},
Pages = {{228-240}},
Month = {{FEB 15}},
Abstract = {{A FeCoNiCrTi0.2 high-entropy alloy strengthened by two types of coherent
   nano-precipitates but with the same composition was fabricated, and its
   tensile properties at room (293 K) and cryogenic temperatures (77 K) and
   the corresponding defect-structure evolution were investigated. Compared
   with the single-phase FeCoNiCr parent alloy, the
   precipitation-strengthened FeCoNiCrTi0.2 high-entropy alloy exhibits a
   significant increase in yield strength and ultimate tensile strength but
   with little sacrifice in ductility. Similar to the single-phase FeCoNiCr
   high-entropy alloy, the deformation behavior of this
   precipitation-strengthened FeCoNiCrTi0.2 high-entropy alloy shows strong
   temperature dependence. When the temperature decreases from 293 K to 77
   K, its yield strength and ultimate tensile strength are increased from
   700 MPa to 860 MPa and from 1.24 GPa to 1.58 GPa, respectively,
   associated with a ductility improvement from 36\% to 46\%. However,
   different from the single-phase FeCoNiCr high-entropy alloy with a
   twinning-dominant deformation mode at 77 K. multiple-layered stacking
   faults with a hierarchical substructure prevail in the
   precipitation-strengthened FeCoNiCrTi0.2 high-entropy alloy when
   deformed at 77 K. The mechanism of twinning inhibition in this
   precipitation-strengthened high-entropy alloy is the high energy barrier
   for twin nucleation in the ordered gamma' nano-particles. Our results
   may provide a guide for the design of tough high-entropy alloys for
   applications at cryogenic temperatures through combining precipitation
   strengthening and twinning/stacking faults. (C) 2018 Acta Materialia
   Inc. Published by Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.actamat.2018.11.049}},
ISSN = {{1359-6454}},
EISSN = {{1873-2453}},
ResearcherID-Numbers = {{Shimizu, Yasuo/A-8116-2011
   Nagai, Yasuyoshi/A-8995-2011
   Inoue, Koji/H-1814-2011
   }},
ORCID-Numbers = {{Shimizu, Yasuo/0000-0002-6844-8165
   HU, Alice/0000-0002-0883-315X
   CHEN, Da/0000-0002-3125-4033}},
Times-Cited = {{7}},
Unique-ID = {{ISI:000457665100021}},
}

@article{ ISI:000457665100040,
Author = {Wu, S. W. and Wang, G. and Wang, Q. and Jia, Y. D. and Yi, J. and Zhai,
   Q. J. and Liu, J. B. and Sun, B. A. and Chu, H. J. and Shen, J. and
   Liaw, P. K. and Liu, C. T. and Zhang, T. Y.},
Title = {{Enhancement of strength-ductility trade-off in a high-entropy alloy
   through a heterogeneous structure}},
Journal = {{ACTA MATERIALIA}},
Year = {{2019}},
Volume = {{165}},
Pages = {{444-458}},
Month = {{FEB 15}},
Abstract = {{The improvement in strength is usually accompanied by ductility loss in
   structural materials, which is a long-standing conflict referred as the
   strength-ductility trade-off. Here we present a
   heterogeneous-structures-architecting strategy, in which we design bulk
   high-entropy alloys with the largely enhanced strength-ductility
   trade-off, possessing a yield strength of 711 MPa, a tensile strength of
   928 MPa, and a uniform elongation of 30.3\%. Such an enhancement of the
   strength-ductility trade-off is due to the microstructure comprised with
   a combination of the non-recrystallized and recrystallized grains
   arranged in complex heterogeneous structures with a characteristic
   dimension spanning from the submicron scale to the coarse-sized scale.
   The heterogeneous structures in the high-entropy alloy are produced by
   cold-rolling, followed by intermediate-temperature-annealing. Our
   results demonstrate that heterogeneous designs can be accomplished
   effectively by simple thermal treatments, which offer a design strategy
   towards a new generation of high-strength and high-ductility
   high-entropy alloys. (C) 2018 Acta Materialia Inc. Published by Elsevier
   Ltd. All rights reserved.}},
DOI = {{10.1016/j.actamat.2018.12.012}},
ISSN = {{1359-6454}},
EISSN = {{1873-2453}},
ORCID-Numbers = {{jiabin, liu/0000-0002-6974-9680}},
Times-Cited = {{7}},
Unique-ID = {{ISI:000457665100040}},
}

@article{ ISI:000453494500034,
Author = {Sun, S. J. and Tian, Y. Z. and Lin, H. R. and Yang, H. J. and Dong, X.
   G. and Wang, Y. H. and Zhang, Z. F.},
Title = {{Achieving high ductility in the 1.7 GPa grade CoCrFeMnNi high-entropy
   alloy at 77 K}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{740}},
Pages = {{336-341}},
Month = {{JAN 7}},
Abstract = {{CoCrFeMnNi high-entropy alloys (HEAs) with partially recrystallized (PR)
   structure were fabricated by cold rolling and annealing. The
   microstructures were characterized and the tensile properties were
   tested at 77 K and 293 K, respectively. In contrast to the early necking
   at 293 K, an ultrahigh yield strength of 1692 MPa and a considerable
   uniform elongation of 10.3\% were obtained at 77 K. The notable uniform
   elongation at 77 K can be attributed to the enhanced strain-hardening
   capability via introducing multiple deformation mechanisms in the
   recrystallized grains. This work provides a strategy to design
   high-strength high-ductility HEM for applications at cryogenic
   environments.}},
DOI = {{10.1016/j.msea.2018.10.094}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
ResearcherID-Numbers = {{Zhang, Zhefeng/A-9732-2010
   Tian, Yanzhong/E-8731-2011
   }},
ORCID-Numbers = {{Tian, Yanzhong/0000-0002-6361-4785
   Yang, Huajie/0000-0002-9882-8070}},
Times-Cited = {{7}},
Unique-ID = {{ISI:000453494500034}},
}

@article{ ISI:000449486300079,
Author = {Jin, Xi and Bi, Juan and Zhang, Lu and Zhou, Yang and Du, Xingyu and
   Liang, Yuxin and Li, Bangsheng},
Title = {{A new CrFeNi2Al eutectic high entropy alloy system with excellent
   mechanical properties}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{770}},
Pages = {{655-661}},
Month = {{JAN 5}},
Abstract = {{A low-cost Co-free CrFeNi(3-x)Alx (x = 1, 0.9, 0.8, 0.7, 0.6) eutectic
   high entropy alloy (EHEA) system was designed, successfully prepared and
   characterized. With the increase of Al content, the alloy dramatically
   transforms from a hypoeutectic to a hypereutectic microstructure
   together with an increase in strength and a decrease in ductility. The
   CrFeNi2.2Al0.8 alloy was found to be an eutectic high entropy alloy and
   was composed of face centered cubic (FCC) phase and ordered body
   centered cubic (B2) phase. The hypereutectic CrFeNi2Al alloy shows
   excellent mechanical properties with an ultimate strength of 1357 MPa
   and a total elongation of 6.4\% at the cast condition. The excellent
   mechanical properties of this EHEA system can be attributed to the
   nanolamellar microstructure and suggests a great potential application
   in the engineering field. We also propose a simple strategy to design
   Co-free EHEAs and predict more than ten potential Co-free EHEAs to guide
   experimental searches. (C) 2018 Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2018.08.176}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{7}},
Unique-ID = {{ISI:000449486300079}},
}

@article{ ISI:000461131300006,
Author = {Li, Zezhou and Zhao, Shiteng and Ritchie, Robert O. and Meyers, Marc A.},
Title = {{Mechanical properties of high-entropy alloys with emphasis on
   face-centered cubic alloys}},
Journal = {{PROGRESS IN MATERIALS SCIENCE}},
Year = {{2019}},
Volume = {{102}},
Pages = {{296-345}},
Month = {{MAY}},
Abstract = {{High-entropy alloys (HEAs), also known as multi-principal element alloys
   or multi-component alloys, have been the subject of numerous
   investigations since they were first described in 2004. The earliest HEA
   was the equiatomic CrMnFeCoNi ``Cantor{''} alloy, but HEM now encompass
   a broad class of metallic and ceramic systems. The concept of utilizing
   the high entropy of mixing to develop stable multi-element alloys may
   not be scientifically correct but has produced extraordinary mechanical
   properties in specific HEAs, mainly CrCoNi-based alloys, associated with
   their continuous work-hardening rate that is sustained to large plastic
   strains (similar to 0.5) and at low temperatures. This, in combination
   with the high frictional forces on dislocations and a propensity for
   twinning, leads to outstandingly high fracture toughness values
   (exceeding 200 MPa.m(1/2)) and resistance to shear-band formation under
   dynamic loading. The critical shear strain for the onset of adiabatic
   shear band formation is similar to 7 for the Cantor alloy, much higher
   than that for conventional alloys, suggesting superior ballistic
   properties. The slower diffusion rates resulting from the multi-element
   environment contribute to the excellent intermediate temperature
   performance. We review the principal mechanical properties of these
   alloys with emphasis on the face-centered cubic systems, such as the
   CrCoNi-based alloys. Their favorable mechanical properties and ease of
   processing by conventional means suggest extensive utilization in many
   future structural applications.}},
DOI = {{10.1016/j.pmatsci.2018.12.003}},
ISSN = {{0079-6425}},
EISSN = {{1873-2208}},
ResearcherID-Numbers = {{Ritchie, Robert/A-8066-2008}},
ORCID-Numbers = {{Ritchie, Robert/0000-0002-0501-6998}},
Times-Cited = {{6}},
Unique-ID = {{ISI:000461131300006}},
}

@article{ ISI:000457665100044,
Author = {Slone, C. E. and Miao, J. and George, E. P. and Mills, M. J.},
Title = {{Achieving ultra-high strength and ductility in equiatomic CrCoNi with
   partially recrystallized microstructures}},
Journal = {{ACTA MATERIALIA}},
Year = {{2019}},
Volume = {{165}},
Pages = {{496-507}},
Month = {{FEB 15}},
Abstract = {{Despite having otherwise outstanding mechanical properties, many
   single-phase medium and high entropy alloys are limited by modest yield
   strengths. Although grain refinement offers one opportunity for
   additional strengthening, it requires significant and undesirable
   compromises to ductility. This work therefore explores an alternative,
   simple processing route to achieve strength by cold-rolling and
   annealing an equiatomic CrCoNi alloy to produce heterogeneous, partially
   recrystallized microstructures. Tensile tests reveal that our approach
   dramatically increases the yield strength (to similar to 1100 MPa) while
   retaining good ductility (total elongation similar to 23\%) in the
   single-phase CrCoNi alloy. Scanning and transmission electron microscopy
   indicate that the strengthening is due to the non-recrystallized grains
   retaining their deformation-induced twins and very high dislocation
   densities. Load-unload-reload tests and grain-scale digital image
   correlation are also used to study the accumulation of plastic
   deformation in our highly heterogeneous microstructures. (C) 2018 Acta
   Materialia Inc. Published by Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.actamat.2018.12.015}},
ISSN = {{1359-6454}},
EISSN = {{1873-2453}},
Times-Cited = {{6}},
Unique-ID = {{ISI:000457665100044}},
}

@article{ ISI:000457130800005,
Author = {Shi, Peijian and Ren, Weili and Zheng, Tianxiang and Ren, Zhongming and
   Hou, Xueling and Peng, Jianchao and Hu, Pengfei and Gao, Yanfei and
   Zhong, Yunbo and Liaw, Peter K.},
Title = {{Enhanced strength-ductility synergy in ultrafine-grained eutectic
   high-entropy alloys by inheriting microstructural lamellae}},
Journal = {{NATURE COMMUNICATIONS}},
Year = {{2019}},
Volume = {{10}},
Month = {{JAN 30}},
Abstract = {{Realizing improved strength-ductility synergy in eutectic alloys acting
   as in situ composite materials remains a challenge in conventional
   eutectic systems, which is why eutectic high-entropy alloys (EHEAs), a
   newly-emerging multi-principal-element eutectic category, may offer
   wider in situ composite possibilities. Here, we use an AlCoCrFeNi2.1
   EHEA to engineer an ultrafine-grained duplex microstructure that
   deliberately inherits its composite lamellar nature by tailored
   thermo-mechanical processing to achieve property combinations which are
   not accessible to previously-reported reinforcement methodologies. The
   as-prepared samples exhibit hierarchically-structural heterogeneity due
   to phase decomposition, and the improved mechanical response during
   deformation is attributed to both a two-hierarchical constraint effect
   and a self-generated microcrack-arresting mechanism. This work provides
   a pathway for strengthening eutectic alloys and widens the design
   toolbox for high-performance materials based upon EHEAs.}},
DOI = {{10.1038/s41467-019-08460-2}},
Article-Number = {{489}},
ISSN = {{2041-1723}},
ResearcherID-Numbers = {{Gao, Yanfei/F-9034-2010}},
ORCID-Numbers = {{Gao, Yanfei/0000-0003-2082-857X}},
Times-Cited = {{6}},
Unique-ID = {{ISI:000457130800005}},
}

@article{ ISI:000457664900072,
Author = {Gu, Ji and Song, Min},
Title = {{Annealing-induced abnormal hardening in a cold rolled CrMnFeCoNi high
   entropy alloy}},
Journal = {{SCRIPTA MATERIALIA}},
Year = {{2019}},
Volume = {{162}},
Pages = {{345-349}},
Month = {{MAR 15}},
Abstract = {{A CrMnFeCoNi equiatomic high entropy alloy (HEA) with a single solid
   solution was cold rolled, followed by annealing treatment.
   Annealing-induced abnormal hardening was observed for cold rolled alloy
   after annealing treatment at 773 K. Detailed microstructural
   characterizations indicated that the abnormal hardening phenomenon is
   not due to the precipitation hardening, but is attributed to the
   formation of long-range ordered structure in the HEA matrix. After a
   long time annealing at 773 K, the formations of nano-grains with sharp
   grain boundaries can be observed, and the reduced dislocation density
   and grain boundary relaxation also contribute to the hardening. (C) 2018
   Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.scriptamat.2018.11.042}},
ISSN = {{1359-6462}},
ResearcherID-Numbers = {{Song, Min/C-3730-2013
   }},
ORCID-Numbers = {{Song, Min/0000-0002-3197-4647
   Gu, Ji/0000-0001-7819-1220}},
Times-Cited = {{5}},
Unique-ID = {{ISI:000457664900072}},
}

@article{ ISI:000453826200049,
Author = {Guo, Wenmin and Liu, Bin and Liu, Yong and Li, Tianchen and Fu, Ao and
   Fang, Qihong and Nie, Yan},
Title = {{Microstructures and mechanical properties of ductile NbTaTiV refractory
   high entropy alloy prepared by powder metallurgy}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{776}},
Pages = {{428-436}},
Month = {{MAR 5}},
Abstract = {{Refractory high-entropy alloys (RHEAs) are promising high-temperature
   structural materials due to their high melting point and extraordinarily
   high yield strength. However, their industrial application is greatly
   restricted due to their limited room-temperature ductility. In the
   present investigation, a ductile and strong single-phase NbTaTiV RHEA
   was synthesized by powder metallurgy method. Effects of the sintering
   temperature on the phase formation, microstructural evolution and the
   mechanical properties of the NbTaTiV RHEA were characterized. The
   results show that the NbTaTiV RHEA sintered at 1700 degrees C has an
   equiaxed single bcc phase microstructure, no obvious porosity and
   compositional segregation can be observed. The alloy exhibits a
   relatively high hardness of 510 HV, yield strength of 1.37 GPa, and
   compressive fracture strength of 2.19 GPa with a high fracture strain of
   23\% at room temperature. Typical strain softening and steady state flow
   occur during compressive deformation at high temperatures. During
   deformation at 1000 degrees C, the alloy still exhibits high yield
   strength of 437 MPa with a compression strain over than 40\%. The
   outstanding mechanical properties is mainly attributed to the
   homogeneous and fine microstructures, and solid solution strengthening
   effect. It can be concluded that the powder metallurgy is a promising
   way for preparing ductile RHEAs with outstanding comprehensive
   mechanical properties. (C) 2018 Published by Elsevier B.V.}},
DOI = {{10.1016/j.jallcom.2018.10.230}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{5}},
Unique-ID = {{ISI:000453826200049}},
}

@article{ ISI:000454506800014,
Author = {Tian, Y. Z. and Sun, S. J. and Lin, H. R. and Zhang, Z. F.},
Title = {{Fatigue behavior of CoCrFeMnNi high-entropy alloy under fully reversed
   cyclic deformation}},
Journal = {{JOURNAL OF MATERIALS SCIENCE \& TECHNOLOGY}},
Year = {{2019}},
Volume = {{35}},
Number = {{3}},
Pages = {{334-340}},
Month = {{MAR}},
Abstract = {{Bulk ultrafine-grained (UFG) CoCrFeMnNi high-entropy alloy (HEA) with
   fully recrystallized microstructure was processed by cold rolling and
   annealing treatment. The high-cycle fatigue behaviors of the UFG HEA and
   a coarse-grained (CG) counterpart were investigated under fully reversed
   cyclic deformation. The fatigue strength of the UFG HEA can be
   significantly enhanced by refining the grain size. However, no grain
   coarsening was observed in the UFG HEA during fatigue tests. Mechanisms
   for the superior mechanical properties of the UFG HEA were explored. (C)
   2018 Published by Elsevier Ltd on behalf of The editorial office of
   Journal of Materials Science \& Technology.}},
DOI = {{10.1016/j.jmst.2018.09.068}},
ISSN = {{1005-0302}},
ResearcherID-Numbers = {{Tian, Yanzhong/E-8731-2011
   Zhang, Zhefeng/A-9732-2010}},
ORCID-Numbers = {{Tian, Yanzhong/0000-0002-6361-4785
   }},
Times-Cited = {{5}},
Unique-ID = {{ISI:000454506800014}},
}

@article{ ISI:000450981100087,
Author = {Cheng, Hu and Liu, Xiaoqiang and Tang, Qunhua and Wang, Weiguo and Yan,
   Xiaohui and Dai, Pinqiang},
Title = {{Microstructure and mechanical properties of FeCoCrNiMnAlx high-entropy
   alloys prepared by mechanical alloying and hot-pressed sintering}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{775}},
Pages = {{742-751}},
Month = {{FEB 15}},
Abstract = {{To improve the strength and hardness, Al-containing FeCoCrNiMn
   high-entropy alloys (HEAs) were fabricated by mechanical alloying (MA)
   and hot-pressed sintering. The effects of Al concentration on the
   microstructure and mechanical properties of the alloys were examined. It
   was found that the Al-containing alloys consisted of the matrix fcc or
   fcc + bcc duplex solid solution phases and a small quantity of M7C3 +
   M23C6 (where M = Cr, Mn, Fe) carbides and Al2O3 phases. A high Al
   concentration induced bcc precipitates in the alloys, and with the
   increase of Al concentration, the crystalline structure of the matrix
   solid solution phase changed from fcc to bcc. The addition of Al
   obviously strengthened the alloys, especially the alloys that contained
   fcc + bcc duplex solid solution phases. For example, the yield strength,
   compressive strength and hardness of alloy FeCoCrNiMnAl0.7 reached as
   high as 2230 MPa, 2552 MPa and 622 HV, respectively. The high
   strength/hardness was attributed mainly to the finer grains and the bcc
   precipitation. (C) 2018 Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2018.10.168}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{5}},
Unique-ID = {{ISI:000450981100087}},
}

@article{ ISI:000463634200010,
Author = {Liu, Junpeng and Guo, Xiaoxiang and Lin, Qingyun and He, Zhanbing and
   An, Xianghai and Li, Laifeng and Liaw, Peter K. and Liao, Xiaozhou and
   Yu, Liping and Lin, Junpin and Xie, Lu and Ren, Jingli and Zhang, Yong},
Title = {{Excellent ductility and serration feature of metastable CoCrFeNi
   high-entropy alloy at extremely low temperatures}},
Journal = {{SCIENCE CHINA-MATERIALS}},
Year = {{2019}},
Volume = {{62}},
Number = {{6}},
Pages = {{853-863}},
Month = {{JUN}},
Abstract = {{Seldom could metals and alloys maintain excellent properties in
   cryogenic condition, such as the ductility, owing to the restrained
   dislocation motion. However, a face-centered-cubic (FCC) CoCrFeNi
   high-entropy alloy (HEA) with great ductility is investigated under the
   cryogenic environment. The tensile strength of this alloy can reach a
   maximum at 1,251 +/- 10 MPa, and the strain to failure can stay at as
   large as 62\% at the liquid helium temperature. We ascribe the high
   strength and ductility to the low stacking fault energy at extremely low
   temperatures, which facilitates the activation of deformation twinning.
   Moreover, the FCC-HCP (hexagonal close-packed) transition and serration
   lead to the sudden decline of ductility below 77 K. The dynamical
   modeling and analysis of serrations at 4.2 and 20 K verify the unstable
   state due to the FCC-HCP transition. The deformation twinning together
   with phase transformation at liquid helium temperature produces an
   adequate strain-hardening rate that sustains the stable plastic flow at
   high stresses, resulting in the serration feature.}},
DOI = {{10.1007/s40843-018-9373-y}},
ISSN = {{2095-8226}},
EISSN = {{2199-4501}},
ResearcherID-Numbers = {{Liao, Xiaozhou/B-3168-2009
   }},
ORCID-Numbers = {{Liao, Xiaozhou/0000-0001-8565-1758
   An, Xianghai/0000-0002-4246-3797}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000463634200010}},
}

@article{ ISI:000462900600007,
Author = {Qiu, Y. and Thomas, S. and Fabijanic, D. and Barlow, A. J. and Fraser,
   H. L. and Birbilis, N.},
Title = {{Microstructural evolution, electrochemical and corrosion properties of
   AlxCoCrFeNiTiy high entropy alloys}},
Journal = {{MATERIALS \& DESIGN}},
Year = {{2019}},
Volume = {{170}},
Month = {{MAY 15}},
Abstract = {{The microstructure of the AlxCoCrFeNiTiy high entropy alloy (HEA) system
   was studied using X-ray diffraction, scanning and transmission electron
   microscopy. A microstructural evolution from single-phase FCC to FCC +
   BCC + B2 occurred with increasing Al content. The addition of a
   comparatively small amount of Ti led to the formation of a Fe-Cr sigma
   phase. The corrosion characteristics of the alloy system were studied
   across different compositions, with such an alloy system exhibiting a
   high resistance to general corrosion, superior to stainless steel 304L
   in 0.6 M NaCl. Cyclic potentiodynamic polarisation suggested that the
   HEAs studied underwent pitting corrosion following breakdown. From
   exposure testing, it was seen that very fine pitting, although not
   extensive in nature, was the principle form of corrosion for
   AlxCoCrFeNiTiy after prolonged immersion. There was little evidence of
   microgalvanic corrosion or selective dissolution of a particular phase
   observed, despite the heterogeneous microstructure and significant
   elemental segregation in the alloys studied. The composition of the
   surface films formed upon the Al(x)CoCrFeNiTi(y )alloys were elaborated
   by X-ray photoelectron spectroscopy, which provided new and further
   insights regarding the surface films of such alloys. The study herein
   contributes to an emerging understanding of the corrosion
   characteristics of high entropy alloys. (C) 2019 The Authors. Published
   by Elsevier Ltd.}},
DOI = {{10.1016/j.matdes.2019.107698}},
Article-Number = {{107698}},
ISSN = {{0264-1275}},
EISSN = {{1873-4197}},
ResearcherID-Numbers = {{Barlow, Anders/G-4021-2016}},
ORCID-Numbers = {{Barlow, Anders/0000-0001-9949-8467}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000462900600007}},
}

@article{ ISI:000455967200014,
Author = {Qin, Gang and Chen, Ruirun and Zheng, Huiting and Fang, Hongze and Wang,
   Liang and Su, Yanqing and Guo, Jingjie and Fu, Hengzhi},
Title = {{Strengthening FCC-CoCrFeMnNi high entropy alloys by Mo addition}},
Journal = {{JOURNAL OF MATERIALS SCIENCE \& TECHNOLOGY}},
Year = {{2019}},
Volume = {{35}},
Number = {{4}},
Pages = {{578-583}},
Month = {{APR}},
Abstract = {{In order to strengthen the face-centered-cubic (FCC) type CoCrFeMnNi
   high entropy alloys (HEAs), different contents of Mo (0-16 at.\%,
   similarly hereinafter) were alloyed. Phase evolution, microstructure,
   mechanical properties and related mechanism of these HEAs were
   systematically studied. The results show that sigma phase is appeared
   with addition of Mo, and the volume fraction of it increases gradually
   from 0 to 66\% with increasing Mo content. It is found that Mo is
   enriched in sigma phase, which indicates that Mo element is beneficial
   to form sigma phase. Compressive testing shows that the yield strength
   of the alloys increases gradually from 216 to 765 MPa, while the
   fracture strain decreases from 50\% (no fracture) to 19\% with
   increasing of Mo. The alloy exhibits the best compressive performance
   when Mo content reaches 11\%, the yield strength, fracture strength and
   fracture strain are 547 MPa, 2672 MPa and 44\% respectively. The
   increased volume fraction of sigma phase plays an important role in
   improving the compressive strength of (CoCrFeMnNi)(100-x),Mo-x, HEAs.
   (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of
   Journal of Materials Science \& Technology.}},
DOI = {{10.1016/j.jmst.2018.10.009}},
ISSN = {{1005-0302}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000455967200014}},
}

@article{ ISI:000457664900059,
Author = {Cai, Y. P. and Wang, G. J. and Ma, Y. J. and Cao, Z. H. and Meng, X. K.},
Title = {{High hardness dual-phase high entropy alloy thin films produced by
   interface alloying}},
Journal = {{SCRIPTA MATERIALIA}},
Year = {{2019}},
Volume = {{162}},
Pages = {{281-285}},
Month = {{MAR 15}},
Abstract = {{In this work, we present a tunable alloying strategy to prepare high
   entropy alloy (HEA) thin films with FCC/BCC dual-phase structure. The
   dual-phase HEA films consist of uniformly equiaxed grains with average
   size about 40 nm. Comparing with single-phase FCC HEA, the dual-phase
   HEA has higher hardness up to 10.4 GPa. The relative large atomic radius
   of Al leads to severe lattice distortion, resulting in a stronger solid
   solution strengthening behavior in the dual-phase HEA. Moreover, high
   dense heterogeneous phase interfaces effectively blocking dislocation
   motion enhance the strain hardening ability further. (C) 2018 Acta
   Materialia Inc. Published by Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.scriptamat.2018.11.004}},
ISSN = {{1359-6462}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000457664900059}},
}

@article{ ISI:000457664900005,
Author = {Gwalani, Bharat and Gorsse, Stephane and Choudhuri, Deep and Zheng,
   Yufeng and Mishra, Rajiv S. and Banerjee, Rajarshi},
Title = {{Tensile yield strength of a single bulk Al0.3CoCrFeNi high entropy alloy
   can be tuned from 160 MPa to 1800 MPa}},
Journal = {{SCRIPTA MATERIALIA}},
Year = {{2019}},
Volume = {{162}},
Pages = {{18-23}},
Month = {{MAR 15}},
Abstract = {{While there have been multiple recent reports in the literature of
   exceptional combinations of yield strength and ductility in high entropy
   alloys, there have been no reports discussing the extraordinary
   tunability of the mechanical properties in the same alloy in these
   systems. This paper shows that the tensile yield-strength of a single
   Al0.3CoCrFeNi high entropy alloy (or complex-concentrated alloy), can be
   enhanced from 160 MPa to over 1800 MPa (1.8 GPa), a 1025\% increase, via
   microstructural engineering enabled by thermo-mechanical processing of
   the bulk alloy. Such strength variations for the same composition are
   unprecedented in any other class of alloys. (C) 2018 Acta Materialia
   Inc. Published by Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.scriptamat.2018.10.023}},
ISSN = {{1359-6462}},
ResearcherID-Numbers = {{Gorsse, Stephane/M-9207-2019
   Choudhuri, Deep/M-5843-2016
   }},
ORCID-Numbers = {{Gorsse, Stephane/0000-0003-1966-8476
   Choudhuri, Deep/0000-0001-9590-9855
   Zheng, Yufeng/0000-0003-2166-5784}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000457664900005}},
}

@article{ ISI:000454856800099,
Author = {Jumaev, Elyorjon and Hong, Sung Hwan and Kim, Jeong Tae and Park, Hae
   Jin and Kim, Young Seok and Mun, Sang Chul and Park, Jun-Young and Song,
   Gian and Lee, Jong Kook and Min, Byung Ho and Lee, Taegyu and Kim, Ki
   Buem},
Title = {{Chemical evolution-induced strengthening on AlCoCrNi dual-phase
   high-entropy alloy with high specific strength}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{777}},
Pages = {{828-834}},
Month = {{MAR 10}},
Abstract = {{Quaternary AlCoCrNi alloy was designed by removing the heavy constituent
   of Fe from the dual-phase AlCoCrFeNi high-entropy alloy to achieve low
   density with good mechanical properties. The AlCoCrNi alloy exhibited a
   nano-scale dual-phase structure consisted of Cr-rich A2 and
   Ni(Co)-Al-rich B2 phases with a high degree of coherence in both
   dendritic and interdendritic regions. In particular, the Ni(Co)-Al-rich
   B2 phase revealed the non-stoichiometric composition between the Ni and
   the Al, which deviated with the Ni-Al-rich B2 phase with a
   stoichiometric composition in the previous AlCoCrFeNi high-entropy
   alloy. The chemical evolution in the constituent phases strongly
   affected the mechanical properties of the dual-phase high-entropy alloy.
   Based on these microstructural features of the AlCoCrNi alloy, the
   mechanical properties were systematically investigated at wide
   temperature ranges. (C) 2018 Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2018.11.057}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000454856800099}},
}

@article{ ISI:000459358200037,
Author = {Zhang, Luchan and Xiang, Yang and Han, Jian and Srolovitz, David J.},
Title = {{The effect of randomness on the strength of high-entropy alloys}},
Journal = {{ACTA MATERIALIA}},
Year = {{2019}},
Volume = {{166}},
Pages = {{424-434}},
Month = {{MAR}},
Abstract = {{High-entropy alloys (HEM), i.e., single-phase, (nearly) equiatomic
   multicomponent, metallic materials, are associated with novel mechanical
   properties, such as high strength, fracture resistance etc. In this
   paper, a stochastic Peierls-Nabarro (PN) model is proposed to understand
   how random site occupancy affects intrinsic strength. The stochastic PN
   model accounts for the randomness in the composition, characterized by
   both the standard deviation of the perturbation in the interplanar
   potential and the correlation length within the spatial compositional
   distribution. The model presented includes the effects of non-uniform
   compositional distribution both in the direction of dislocation glide
   and along a dislocation line to predict overall dislocation glide
   resistance. The model predicts the intrinsic strength of HEAs as a
   function of the standard deviation and the correlation length of the
   randomness. We find that, in most of the parameter space, the
   compositional randomness in an HEA gives rise to an intrinsic strength
   that far exceeds that of any of the pure metals from which the HEA is
   composed. This approach provides a fundamental explanation to the origin
   of the high strength of HEAs. (C) 2018 Acta Materialia Inc. Published by
   Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.actamat.2018.12.032}},
ISSN = {{1359-6454}},
EISSN = {{1873-2453}},
ResearcherID-Numbers = {{Han, Jian/R-1879-2019
   Srolovitz, David J/F-4655-2012
   Xiang, Yang/B-6304-2016}},
ORCID-Numbers = {{Han, Jian/0000-0002-3800-9436
   Srolovitz, David J/0000-0001-6038-020X
   Xiang, Yang/0000-0002-7279-3711}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000459358200037}},
}

@article{ ISI:000458227900034,
Author = {Guo, Lin and Ou, Xiaoqin and Ni, Song and Liu, Yong and Song, Min},
Title = {{Effects of carbon on the microstructures and mechanical properties of
   FeCoCrNiMn high entropy alloys}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{746}},
Pages = {{356-362}},
Month = {{FEB 11}},
Abstract = {{FeCoCrNiMn based high entropy alloys (HEM) doped with different carbon
   contents were prepared by vacuum arc melting. The effects of carbon on
   phase composition and mechanical properties of the HEMs were
   investigated. After cold rolling and annealing processes, fine M23C6
   carbides with an average size of similar to 230 nm were observed in the
   HEM doped with carbon. The volume fraction of M23C6 reaches 8.9\% in the
   alloy doped with 1.0 at\% carbon. The precipitation of M23C6 particles
   exerts a strong pinning force for the migration of grain boundary, which
   results in the formation of refined grains. Compared to those of the HEA
   without carbon, the yield strength and ultimate tensile strength of the
   HEA doped with 1.0 at\% carbon increase from 378.7 MPa to 643.8 MPa, and
   from 700.1 MPa to 887.6 MPa, respectively, while the uniform elongation
   decreases from 43.5\% to 24.9\%. The strengthening mechanisms for the
   increase in the mechanical properties by carbon doping are attributed to
   the refinement of the grains, lattice friction stress and the
   precipitation of the M23C6 particles.}},
DOI = {{10.1016/j.msea.2019.01.050}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000458227900034}},
}

@article{ ISI:000456753700014,
Author = {Ming, Kaisheng and Bi, Xiaofang and Wang, Jian},
Title = {{Strength and ductility of CrFeCoNiMo alloy with hierarchical
   microstructures}},
Journal = {{INTERNATIONAL JOURNAL OF PLASTICITY}},
Year = {{2019}},
Volume = {{113}},
Pages = {{255-268}},
Month = {{FEB}},
Abstract = {{Single-phase multi-principal-element alloys (MPEAs) with face-centered
   cubic (FCC) structure generally exhibit low yield strength but superb
   ductility and strain hardening capability. In this work, we demonstrate
   that enhancing yield strength while retaining good ductility of single
   phase FCC MPEAs can be achieved by developing hierarchical
   microstructures. A non-equiatomic Cr20Fe6Co34Ni34Mo6 alloy with
   single-phase FCC structure was fabricated and immediately cold rolled
   with similar to 70\% thickness reduction after a liquid nitrogen bath.
   The cold-rolled sample was then annealed at various temperatures in a
   range of 675-1150 degrees C for various periods. As annealing
   temperature exceeds 800 degrees C, annealed samples exhibit
   coarse-grained microstructure and low yield strength, while high strain
   hardening rate and good ductility. As annealing temperature is lower
   than 800 degrees C, annealed samples develop hierarchical
   microstructures that comprise high density of annealing nano-twins in
   recrystallized fine grains (grain size similar to 1 mu m) and stable
   dislocation walls in non-fully recrystallized fine grains. The addition
   of Mo in the system is found to be very effective in retarding the
   recrystallization and grain growth, promoting formation of
   recrystallized fine grains. Mechanical tensile testing reveals that such
   kind of hierarchical microstructure enhances yield strength of single
   phase FCC MPEAs (1.1 GPa) while retains good ductility (uniform
   elongation of similar to 29\%) and high ultimate tensile strength (1.3
   GPa). Grain boundaries, twin boundaries and dislocation walls act as
   strong barriers for dislocation motion, enhancing yield strength and
   strain hardening capacity. Dislocation walls also act as sources for
   dislocations and deformation twins at large deformation stages,
   retaining a good ductility. Engineering such hierarchical
   microstructures should thus be an efficient strategy in enhancing
   mechanical properties of FCC MPEAs with low or medium stacking fault
   energies.}},
DOI = {{10.1016/j.ijplas.2018.10.005}},
ISSN = {{0749-6419}},
EISSN = {{1879-2154}},
ResearcherID-Numbers = {{Wang, Jian/F-2669-2012}},
ORCID-Numbers = {{Wang, Jian/0000-0001-5130-300X}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000456753700014}},
}

@article{ ISI:000449486300026,
Author = {Park, Sangwon and Park, Chulho and Na, Youngsang and Kim, Hyoung-Seop
   and Kang, Namhyun},
Title = {{Effects of (W, Cr) carbide on grain refinement and mechanical properties
   for CoCrFeMnNi high entropy alloys}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{770}},
Pages = {{222-228}},
Month = {{JAN 5}},
Abstract = {{In this study, we investigated the influence of (W, Cr) carbide on the
   hardness and tensile properties of friction stir welds (FSWs) for
   CoCrFeMnNi high entropy alloys. FSW without cracks or voids were
   achieved for rotational speeds of 400-1000 rpm. As the rotational speed
   increased, the thinning of the weld thickness compared to the thickness
   of the base metal was increased. Specifically, an abnormal
   tornado-shaped region was observed in the stir zone at rotation speeds
   of 600 rpm and above. The tensile strength increased as the rotation
   speed increased from 400 to 800 rpm and decreased at a rotation speed of
   1000 rpm. The abnormal region with a fine (W, Cr) carbide of 0.5 mm or
   less was dispersed in the grain boundaries. At a rotation speed of 800
   rpm, the dispersion of fine (W, Cr) carbide was optimized to produce
   grain refinement and maximum tensile strength. However, at 1000 rpm, (W,
   Cr) carbide coarsened due to high heat input, and the number of carbide
   particles per unit area decreased, thereby decreasing the hardness and
   tensile strength. (C) 2018 Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2018.08.115}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000449486300026}},
}

@article{ ISI:000449904400007,
Author = {Shabani, Ali and Toroghinejad, Mohammad Reza and Shafyei, Ali and Loge,
   Roland E.},
Title = {{Evaluation of the mechanical properties of the heat treated FeCrCuMnNi
   high entropy alloy}},
Journal = {{MATERIALS CHEMISTRY AND PHYSICS}},
Year = {{2019}},
Volume = {{221}},
Pages = {{68-77}},
Month = {{JAN 1}},
Abstract = {{As cast FeCrCuMnNi high entropy alloys were heat treated at different
   temperatures and times. Structure and mechanical properties of the heat
   treated alloy were studied using X-Ray diffraction, tensile test,
   hardness test and scanning electron microscopy. It has been found that
   the FeCrCuMnNi has thermal stability in mechanical properties almost up
   to 600 degrees C. Nevertheless, the alloy revealed an unusual behavior
   after heat treating at higher temperatures. A sharp drop of the tensile
   strength, strain to fracture and work hardening capability occurred at
   temperatures between 700 degrees C and 800 degrees C due to formation of
   a hard a phase in the alloy. The hardness follows a plateau in the
   700-800 degrees C range and then softening continues, together with a
   decrease in strength and increase in ductility, due to dissolution of
   the hard a phase and decreased amount of BCC phase.}},
DOI = {{10.1016/j.matchemphys.2018.09.033}},
ISSN = {{0254-0584}},
EISSN = {{1879-3312}},
Times-Cited = {{4}},
Unique-ID = {{ISI:000449904400007}},
}

@article{ ISI:000456789000075,
Author = {Long, Yan and Liang, Xiaobiao and Su, Kai and Peng, Haiyan and Li,
   Xiaozhen},
Title = {{A fine-grained NbMoTaWVCr refractory high-entropy alloy with ultra-high
   strength: Microstructural evolution and mechanical properties}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{780}},
Pages = {{607-617}},
Month = {{APR 5}},
Abstract = {{Mechanically alloyed (MA) NbMoTaWVCr refractory high-entropy alloy (HEA)
   powders were sintered by spark plasma sintering (SPS) at temperatures of
   1400-1700 degrees C. The microstructural evolution and mechanical
   properties of sintered HEAs were subsequently investigated. During the
   MA process, only a supersaturated body-centered cubic (BCC) structured
   solid solution was formed. However, C15 Laves phase (Cr,V)(2)(Ta,Nb) and
   Ta2VO6 particles were precipitated from the disordered BCC phase during
   the sintering process at temperatures <= 1500 degrees C. When the
   sintering temperature increased to 1600 degrees C, the Laves phase was
   transferred to C14 structure and its volume fraction was dramatically
   reduced. The plasticity of the refractory HEA was strongly affected by
   the fraction, size and distribution of Laves phase and oxide particles.
   The NbMoTaWVCr alloy sintered at 1500 degrees C obtained an excellent
   combination of yield strength (3416 MPa) and failure plasticity (5.3\%)
   at room temperature. The extraordinary high strength of this HEA could
   be dominantly attributed to the grain boundary strengthening from the
   micron-sized BCC phase (1.24 mu m), interstitial solid solution
   strengthening from O in the matrix and the inherent solid solution
   strengthening in the multi-principal element NbMoTaWVCr alloy. (C) 2018
   Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2018.11.318}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{3}},
Unique-ID = {{ISI:000456789000075}},
}

@article{ ISI:000458591100020,
Author = {Liu, Y. Y. and Chen, Z. and Shi, J. C. and Wang, Z. Y. and Zhang, J. Y.},
Title = {{The effect of Al content on microstructures and comprehensive properties
   in AlxCoCrCuFeNi high entropy alloys}},
Journal = {{VACUUM}},
Year = {{2019}},
Volume = {{161}},
Pages = {{143-149}},
Month = {{MAR}},
Abstract = {{The multicomponent Al.CoCrCuFeNi high entropy alloys (x = 0, 0.5, 1,
   1.5, 2) were prepared by vacuum arc melting. The relation of Al content,
   microstructures, mechanical properties and electrochemical properties
   was investigated by XRD, SEM, TEM, hardness and electrochemical tests.
   Three typical structures including Cu-rich nano-precipitates of FCC
   structure, Al-Ni-rich plate of B2 structure, and Fe-Cr-rich plate of BCC
   structure were observed in the refined microstructures with the increase
   of the content of aluminum, and the hardness was increased due to the
   increase of fraction of BCC phase as well. Additions of Al element could
   augment not only friction and wear resistance but also the corrosion
   behavior in corresponding acidic, alkaline and saline solutions as Al
   element was propitious to formation of passivation layer.}},
DOI = {{10.1016/j.vacuum.2018.12.009}},
ISSN = {{0042-207X}},
Times-Cited = {{3}},
Unique-ID = {{ISI:000458591100020}},
}

@article{ ISI:000459798700021,
Author = {Sohn, Seok Su and da Silva, Alisson Kwiatkowski and Ikeda, Yuji and
   Koermann, Fritz and Lu, Wenjun and Choi, Won Seok and Gault, Baptiste
   and Ponge, Dirk and Neugebauer, Joerg and Raabe, Dierk},
Title = {{Ultrastrong Medium-Entropy Single-Phase Alloys Designed via Severe
   Lattice Distortion}},
Journal = {{ADVANCED MATERIALS}},
Year = {{2019}},
Volume = {{31}},
Number = {{8}},
Month = {{FEB 22}},
Abstract = {{Severe lattice distortion is a core effect in the design of
   multiprincipal element alloys with the aim to enhance yield strength, a
   key indicator in structural engineering. Yet, the yield strength values
   of medium- and high-entropy alloys investigated so far do not
   substantially exceed those of conventional alloys owing to the
   insufficient utilization of lattice distortion. Here it is shown that a
   simple VCoNi equiatomic medium-entropy alloy exhibits a near 1 GPa yield
   strength and good ductility, outperforming conventional solid-solution
   alloys. It is demonstrated that a wide fluctuation of the atomic bond
   distances in such alloys, i.e., severe lattice distortion, improves both
   yield stress and its sensitivity to grain size. In addition, the
   dislocation-mediated plasticity effectively enhances the
   strength-ductility relationship by generating nanosized dislocation
   substructures due to massive pinning. The results demonstrate that
   severe lattice distortion is a key property for identifying extra-strong
   materials for structural engineering applications.}},
DOI = {{10.1002/adma.201807142}},
Article-Number = {{1807142}},
ISSN = {{0935-9648}},
EISSN = {{1521-4095}},
ResearcherID-Numbers = {{Raabe, Dierk/A-6470-2009
   Kormann, Fritz/A-5677-2012
   }},
ORCID-Numbers = {{Raabe, Dierk/0000-0003-0194-6124
   Kormann, Fritz/0000-0003-3050-6291
   Sohn, Seok Su/0000-0002-4504-0028
   Gault, Baptiste/0000-0002-4934-0458}},
Times-Cited = {{3}},
Unique-ID = {{ISI:000459798700021}},
}

@article{ ISI:000457665100038,
Author = {Choudhuri, Deep and Gwalani, Bharat and Gorsse, Stephane and Komarasamy,
   Mageshwari and Mantri, Srinivas A. and Srinivasan, Srivilliputhur G. and
   Mishra, Rajiv S. and Banerjee, Rajarshi},
Title = {{Enhancing strength and strain hardenability via deformation twinning in
   fcc-based high entropy alloys reinforced with intermetallic compounds}},
Journal = {{ACTA MATERIALIA}},
Year = {{2019}},
Volume = {{165}},
Pages = {{420-430}},
Month = {{FEB 15}},
Abstract = {{Twinning is a key deformation mechanism in face-centered-cubic
   (fcc)-based and some body-centered cubic (bcc)-based alloys, which
   imparts excellent strength-ductility combination by increasing
   strain-hardenability. Typically, twinning in fcc-based alloys increases
   when the stacking fault energy is lowered via changes in composition.
   The present study clearly demonstrates that deformation twinning can be
   enhanced when hard-intermetallic compounds like ordered B2 and sigma
   phases form in the fcc matrix of a high entropy alloy (HEA), leading to
   an excellent combination of strength, ductility, and
   strain-hardenability. Such a combination of properties was achieved by
   exploiting the novel and often unusual phase stability regimes that can
   be accessed in these complex concentrated HEAs. The present study
   exploits a unique three-phase mixture of recrystallized fine-grained fcc
   + B2 sigma in a prototypical Al0.3CoCrFeNi HEA to demonstrate this
   effect. Coupling transmission electron microscopy and molecular dynamics
   simulations revealed that B2 grains enhance deformation twinning by
   raising the local stress levels, consequently forming substantially
   thicker twins as compared to the single fcc-phase condition of
   Al0.3CoCrFeNi. The local stresses were further accommodated via
   nano-twinning, limited B2 plasticity, and highly restricted micro-cracks
   in and around the sigma grains. (C) 2018 Acta Materialia Inc. Published
   by Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.actamat.2018.12.010}},
ISSN = {{1359-6454}},
EISSN = {{1873-2453}},
ResearcherID-Numbers = {{Gorsse, Stephane/M-9207-2019
   Choudhuri, Deep/M-5843-2016
   Mishra, Rajiv/A-7985-2009}},
ORCID-Numbers = {{Gorsse, Stephane/0000-0003-1966-8476
   Choudhuri, Deep/0000-0001-9590-9855
   Mishra, Rajiv/0000-0002-1699-0614}},
Times-Cited = {{3}},
Unique-ID = {{ISI:000457665100038}},
}

@article{ ISI:000448091100005,
Author = {Fan, J. T. and Zhang, L. J. and Yu, P. F. and Zhang, M. D. and Li, G.
   and Liaw, P. K. and Liu, R. P.},
Title = {{A novel high-entropy alloy with a dendrite-composite microstructure and
   remarkable compression performance}},
Journal = {{SCRIPTA MATERIALIA}},
Year = {{2019}},
Volume = {{159}},
Pages = {{18-23}},
Month = {{JAN 15}},
Abstract = {{In the present study, a novel dendrite-composite high-entropy alloy
   consisting of nano-structured interdendritic regions and coarse
   dendrites was successfully designed and prepared by arc-melting.
   Interestingly, the as-cast Al18Fe33.3CO23Ni23C2.7 (at. \%) alloy
   exhibited a great combination of high compressive strength and strain.
   More importantly, the new material exhibited pronounced three-stage
   work-hardening behavior. It was found that deformation twinning in the
   interdendritic region is the dominant mechanism responsible for the
   multi-stage work-hardening, thereby leading to good compression behavior
   of the new material. The synergistic effects between the dendrite and
   interdendritic regions are also effective for improving the mechanical
   property of the alloy. (C) 2018 Acta Materialia Inc. Published by
   Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.scriptamat.2018.09.008}},
ISSN = {{1359-6462}},
Times-Cited = {{3}},
Unique-ID = {{ISI:000448091100005}},
}

@article{ ISI:000457510100052,
Author = {Couzinie, J. -P. and Dirras, G.},
Title = {{Body-centered cubic high-entropy alloys: From processing to underlying
   deformation mechanisms}},
Journal = {{MATERIALS CHARACTERIZATION}},
Year = {{2019}},
Volume = {{147}},
Pages = {{533-544}},
Month = {{JAN}},
Abstract = {{In 14 years, high entropy alloys (HEAs) have been among the most studied
   materials in the metallurgical field. The concept is attractive and
   offers the possibility to explore new materials and to revisit the basic
   concepts of metallurgy. Moreover, HEAs show interesting combinations of
   properties which are composition dependent and hence are related to the
   alloy structure. Among the studied HEAs, those with body-centered cubic
   (BCC) systems are particularly interesting as they mainly retain
   attractive mechanical properties and are candidates for structural
   applications under extreme conditions. The present manuscript provides
   an overview on single phase BCC high-entropy alloys with disordered
   structure. Analysis of the existing data from the available literature
   is performed and trends relative to the processing of such materials,
   but also to the mechanical behavior and underlying deformation
   mechanisms, are given, along with some critical view points and
   prospects.}},
DOI = {{10.1016/j.matchar.2018.07.015}},
ISSN = {{1044-5803}},
EISSN = {{1873-4189}},
ResearcherID-Numbers = {{Dirras, Guy/A-4381-2009
   COUZINIE, Jean-Philippe/I-8888-2017}},
ORCID-Numbers = {{COUZINIE, Jean-Philippe/0000-0001-7786-397X}},
Times-Cited = {{3}},
Unique-ID = {{ISI:000457510100052}},
}

@article{ ISI:000471077200006,
Author = {Wei, Daixiu and Li, Xiaoqing and Heng, Weicheng and Koizumi, Yuichiro
   and He, Feng and Choi, Won-Mi and Lee, Byeong-Joo and Kim, Hyoung Seop
   and Kato, Hidemi and Chiba, Akihiko},
Title = {{Novel Co-rich high entropy alloys with superior tensile properties}},
Journal = {{MATERIALS RESEARCH LETTERS}},
Year = {{2019}},
Volume = {{7}},
Number = {{2}},
Pages = {{82-88}},
Abstract = {{We developed a series of Co-rich CoxCr25(FeNi)(75-x) (x = 35, 45, 55,
   65) high entropy alloys with improved strength and/or ductility, derived
   from lowering the stacking fault energy (SFE) and reducing the fcc phase
   stability of the equiatomic CoCrFeNi alloy. Thermodynamics and ab initio
   calculations demonstrated that increasing Co while decreasing Fe and Ni
   concentrations lower the SFE and reduce the fcc phase stability. The
   Co35Cr25Fe20Ni20 and Co45Cr25Fe15Ni15 alloys with single fcc phase,
   exhibit superior tensile properties, contributing to the twinning and
   fcc -> hcp martensitic transformation. The present study offers a
   guideline for designing high-performance high entropy alloys.
   {[}GRAPHICS]
   IMPACT STATEMENT
   A series of novel Co-rich non-equiatomic high entropy alloys with
   enhanced tensile properties were developed by lowering the stacking
   fault energy and reducing the phase stability of equiatomic CoCrFeNi
   alloy.}},
DOI = {{10.1080/21663831.2018.1553803}},
ISSN = {{2166-3831}},
ResearcherID-Numbers = {{Kato, Hidemi/B-2492-2015
   Kim, Hyoung Seop/C-2166-2009}},
ORCID-Numbers = {{Kim, Hyoung Seop/0000-0002-3155-583X}},
Times-Cited = {{3}},
Unique-ID = {{ISI:000471077200006}},
}

@article{ ISI:000466821500022,
Author = {Ye, Y. X. and Musico, B. L. and Lu, Z. Z. and Xu, L. B. and Lei, Z. F.
   and Keppens, V and Xu, H. X. and Nieh, T. G.},
Title = {{Evaluating elastic properties of a body-centered cubic NbHfZrTi
   high-entropy alloy - A direct comparison between experiments and ab
   initio calculations}},
Journal = {{INTERMETALLICS}},
Year = {{2019}},
Volume = {{109}},
Pages = {{167-173}},
Month = {{JUN}},
Abstract = {{In this study, elastic constants of the equiatomic body-centered cubic
   NbHfZrTi high-entropy alloy (HEA) were experimentally evaluated using
   resonant ultrasound spectroscopy and compared directly with calculations
   based on density functional theory. Elastic properties, including
   Young's modulus, shear modulus, bulk modulus, Poisson's ratio, and Debye
   temperature, of polycrystalline aggregates were obtained from
   measurements and calculations, and excellent agreement was found between
   the experimental and theoretical data. We also made efforts to employ
   the rule-of-mixtures (ROM) to predict the elastic moduli of the current
   alloy, as well as other HEAs reported in the literature, and found that
   the lower-bound prediction provided a reasonable estimate of the elastic
   moduli of single-phase HEAs.}},
DOI = {{10.1016/j.intermet.2019.04.003}},
ISSN = {{0966-9795}},
EISSN = {{1879-0216}},
ORCID-Numbers = {{Xu, Liubin/0000-0001-5463-2562}},
Times-Cited = {{2}},
Unique-ID = {{ISI:000466821500022}},
}

@article{ ISI:000466252400010,
Author = {Wen, Cheng and Zhang, Yan and Wang, Changxin and Xue, Dezhen and Bai,
   Yang and Antonov, Stoichko and Dai, Lanhong and Lookman, Turab and Su,
   Yanjing},
Title = {{Machine learning assisted design of high entropy alloys with desired
   property}},
Journal = {{ACTA MATERIALIA}},
Year = {{2019}},
Volume = {{170}},
Pages = {{109-117}},
Month = {{MAY 15}},
Abstract = {{We formulate a materials design strategy combining a machine learning
   (ML) surrogate model with experimental design algorithms to search for
   high entropy alloys (HEAs) with large hardness in a model
   Al-Co-Cr-Cu-Fe-Ni system. We fabricated several alloys with hardness
   10\% higher than the best value in the original training dataset via
   only seven experiments. We find that a strategy using both the
   compositions and descriptors based on a knowledge of the properties of
   HEAs, outperforms that merely based on the compositions alone. This
   strategy offers a recipe to rapidly optimize multi-component systems,
   such as bulk metallic glasses and superalloys, towards desired
   properties. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All
   rights reserved.}},
DOI = {{10.1016/j.actamat.2019.03.010}},
ISSN = {{1359-6454}},
EISSN = {{1873-2453}},
ResearcherID-Numbers = {{Yang, Bai/B-9012-2009
   Xue, Dezhen/A-6062-2010
   }},
ORCID-Numbers = {{Yang, Bai/0000-0002-6917-256X
   Xue, Dezhen/0000-0001-6132-1236
   /0000-0001-8886-2040}},
Times-Cited = {{2}},
Unique-ID = {{ISI:000466252400010}},
}

@article{ ISI:000460492600023,
Author = {Klimova, M. V. and Shaysultanov, D. G. and Zherebtsov, S. V. and
   Stepanov, N. D.},
Title = {{Effect of second phase particles on mechanical properties and grain
   growth in a CoCrFeMnNi high entropy alloy}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{748}},
Pages = {{228-235}},
Month = {{MAR 4}},
Abstract = {{Effect of annealing of a cold-worked CoCrFeMnNi alloy at temperatures of
   500-900 degrees C for 1-50 h on the structure and mechanical properties
   was studied in the present work. Annealing for an hour resulted in: i)
   recrystallization of the face-centered cubic (fcc) matrix at 600-900
   degrees C; ii) precipitation of a Cr-rich body-centered cubic (bcc)
   phase at 500-700 degrees C or a sigma phase particles at 600-800 degrees
   C. Moreover, an increase in the annealing time to 50 h at 600 degrees C
   resulted in a continuous growth of both the fcc grans and bcc/sigma
   particles and in an increase in the fraction of the sigma phase at the
   expense of the bcc phase particles. The fcc grains growth was found to
   be controlled by the pinning effect of the second phase particles.
   Soaking for an hour at 500-600 degrees C resulted in a substantial
   increase in strength of the alloy due to the second phases
   precipitation. Meanwhile annealing at the higher temperatures as well as
   an increase in the annealing time at 600 degrees C resulted in
   softening; however, even after 50 h annealing, the alloy demonstrated
   reasonably high strength. In the latter case fine fcc grains, preserved
   due to the pinning effect by the second phases particles, contributed to
   strength mainly.}},
DOI = {{10.1016/j.msea.2019.01.112}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
ResearcherID-Numbers = {{Stepanov, Nikita/P-7089-2019}},
ORCID-Numbers = {{Stepanov, Nikita/0000-0003-2476-3953}},
Times-Cited = {{2}},
Unique-ID = {{ISI:000460492600023}},
}

@article{ ISI:000458874000001,
Author = {Jang, Min Ji and Kwak, Hyunjeong and Lee, Ye Won and Jeong, Youjin and
   Choi, Jahong and Jo, Yong Hee and Choi, Won-Mi and Sung, Hyun Je and
   Yoon, Eun Yoo and Praveen, S. and Lee, Sunghak and Lee, Byeong-Joo and
   Abd El Aal, Mohamed Ibrahim and Kim, Hyoung Seop},
Title = {{Plastic Deformation Behavior of 40Fe-25Ni-15Cr-10Co-10V High-Entropy
   Alloy for Cryogenic Applications}},
Journal = {{METALS AND MATERIALS INTERNATIONAL}},
Year = {{2019}},
Volume = {{25}},
Number = {{2}},
Pages = {{277-284}},
Month = {{MAR}},
Abstract = {{A single FCC phase 40Fe-25Ni-15Cr-10Co-10V high-entropy alloy was
   designed, fabricated, and evaluated for potential cryogenic
   applications. The alloy forms a single FCC phase and exhibits higher
   yield strength, tensile strength, and elongation at cryogenic
   temperature (77K) than at room temperature (298K). The superior tensile
   properties at cryogenic temperature are discussed based on the formation
   of deformation twins during the tensile test at cryogenic temperature.
   In addition, a constitutive model reflecting the cryogenic deformation
   mechanism (i.e., twinning-induced plasticity) was implemented into the
   finite element method to analyze this behavior. Experimental results and
   the finite element analysis suggest that the increase in plastic
   deformation capacity at cryogenic temperature contributes to the
   formation of deformation twins.}},
DOI = {{10.1007/s12540-018-0184-6}},
ISSN = {{1598-9623}},
EISSN = {{2005-4149}},
ResearcherID-Numbers = {{Sathiyamoorthi, Praveen/I-8421-2015}},
ORCID-Numbers = {{Sathiyamoorthi, Praveen/0000-0001-8803-3509}},
Times-Cited = {{2}},
Unique-ID = {{ISI:000458874000001}},
}

@article{ ISI:000479023600035,
Author = {Senkov, O. N. and Gorsse, S. and Miracle, D. B.},
Title = {{High temperature strength of refractory complex concentrated alloys}},
Journal = {{ACTA MATERIALIA}},
Year = {{2019}},
Volume = {{175}},
Pages = {{394-405}},
Month = {{AUG 15}},
Abstract = {{Thermodynamic and mechanical properties of 15 single-phase and 11
   multi-phase refractory complex concentrated alloys (RCCAs) are reported.
   Using the CALPHAD approach, phase diagrams for these alloys are
   calculated to identify the solidus (melting, T-m) temperatures and
   volume fractions of secondary phases. Correlations were identified
   between the strength drops at 1000 degrees C and 1200 degrees C and the
   alloy compositions, room temperature properties, melting temperatures
   and volume fractions of secondary phases. The influence of alloy density
   on the temperature dependence of specific yield strength was also
   explored. The conducted analysis suggests that the loss of
   high-temperature strength of single-phase BCC RCCAs is related to the
   activation of diffusion-controlled deformation mechanisms, which occurs
   at T >= 0.6 T-m, so that the alloys with higher T-m retain their
   strength to higher temperatures. On the other hand, a rapid decrease in
   strength of multi-phase RCCAs with increasing temperature above 1000
   degrees C is probably due to dissolution of secondary phases. (C) 2019
   Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.actamat.2019.06.032}},
ISSN = {{1359-6454}},
EISSN = {{1873-2453}},
ResearcherID-Numbers = {{Gorsse, Stephane/F-5170-2017}},
ORCID-Numbers = {{Gorsse, Stephane/0000-0003-1966-8476}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000479023600035}},
}

@article{ ISI:000473374300004,
Author = {Kim, Young-Kyun and Ham, Gi-Su and Kim, Hyoung Seop and Lee, Kee-Ahn},
Title = {{High-cycle fatigue and tensile deformation behaviors of coarse-grained
   equiatomic CoCrFeMnNi high entropy alloy and unexpected hardening
   behavior during cyclic loading}},
Journal = {{INTERMETALLICS}},
Year = {{2019}},
Volume = {{111}},
Month = {{AUG}},
Abstract = {{High entropy alloy (HEA), a new class of materials, has received
   attention as a substance that can potentially replace conventional
   alloys. Equiatomic CoCrFeMnNi HEA is an attractive material with
   excellent strength-ductility combination and corrosion resistance, and
   it achieves greater performance in low temperatures. This study
   investigated the HCF and tensile deformation behavior of equiatomic
   CoCrFeMnNi HEA. In order to suggest the possibility of the material's
   application in an as-homogenized state, coarse-grained (CG) equiatomic
   CoCrFeMnNi HEA was prepared. Microstructural observation measured an
   average grain size of 245.5 mu m, and it was confirmed to have a
   face-centered cubic (FCC) random solid solution. A tensile test
   confirmed that the yield strength and tensile strength are 293.1 MPa and
   625.6 MPa, respectively, and change in the work hardening rate according
   to deformation twin (DT) evolution during tensile deformation was
   observed. A high-cycle fatigue results shows fatigue strength of 280
   MPa, which is close to its yield strength, and this confirmed that the
   material has outstanding high-cycle fatigue properties considering its
   yield strength. DT is uniquely formed at cycle loading with a stress
   level lower than the critical twinning stress (sigma(T)), and this can
   improve yield strength by approximately 95\% and tensile strength by
   approximately 17\%. Based on the above findings, this study discussed
   the role of DTs which affect the high-cycle fatigue and deformation
   behavior of coarse-grained HEA.}},
DOI = {{10.1016/j.intermet.2019.106486}},
Article-Number = {{106486}},
ISSN = {{0966-9795}},
EISSN = {{1879-0216}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000473374300004}},
}

@article{ ISI:000468903200003,
Author = {Chen, Shuying and Tseng, Ko-Kai and Tong, Yang and Li, Weidong and Tsai,
   Che-Wei and Yeh, Jien-Wei and Liaw, Peter K.},
Title = {{Grain growth and Hall-Petch relationship in a refractory HfNbTaZrTi
   high-entropy alloy}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{795}},
Pages = {{19-26}},
Month = {{JUL 30}},
Abstract = {{Understanding the effect of temperature variation on the microstructural
   evolution is particularly important to refractory high-entropy alloys
   (RHEAs), given their potential high-temperature applications. Here, we
   experimentally investigated the grain-growth behavior of the HfNbTaZrTi
   RHEAs during recrystallization at temperatures from 1,000 to 1,200
   degrees C for varied durations, following cold rolling with a 70\%
   thickness reduction. Following the classical grain-growth kinetics
   analysis, two activation energies are obtained: 205 kJ/mol between 1,000
   and 1,100 degrees C, and 401 kJ/mol between 1,100 and 1,200 degrees C,
   which suggests two mechanisms of grain growth. Moreover, the yield
   strength - grain size relation was found to be well described by the
   Hall-Petch relation in the form of sigma(y) = 942+ 270D(-0.5). It was
   revealed that the friction stress, 942 MPa, in the HfNbTaZrTi HEA is
   higher than that of tungsten alloys, which indicates the high intrinsic
   stress in the BCC-RHEA. The coefficient, 270 MPa/mu m(-1/2), is much
   lower than that in the 316 stainless steel and Al0.3CoCrFeNi HEAs, which
   indicates low grain-boundary strengthening. (C) 2019 Elsevier B.V. All
   rights reserved.}},
DOI = {{10.1016/j.jallcom.2019.04.291}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000468903200003}},
}

@article{ ISI:000471355400014,
Author = {An, X. L. and Zhao, H. and Dai, T. and Yu, H. G. and Huang, Z. H. and
   Guo, C. and Chu, Paul K. and Chu, C. L.},
Title = {{Effects of heat treatment on the microstructure and properties of
   cold-forged CoNiFe medium entropy alloy}},
Journal = {{INTERMETALLICS}},
Year = {{2019}},
Volume = {{110}},
Month = {{JUL}},
Abstract = {{The effects of heat treatment on the microstructure and properties of
   cold-forged two-dimensional (2D) CoNiFe medium entropy alloy (MEA) are
   determined. Compared to the as-cast specimen with a columnar crystal
   structure, the cold-forged CoNiFe MEA has a heavily fragmented
   microstructure with deformation twins. As the annealing temperature is
   increased, the grain size becomes larger markedly. Annealing at 900
   degrees C yields a fully recrystallized microstructure with a large
   population of annealing twins and the new orientation exhibits a first
   order twin relationship (60 degrees < 111 > rotation) during
   recrystallization. Moreover, the CoNiFe HEA annealed at 900 degrees C
   possesses excellent ductility (epsilon = 50\%) and work-hardening
   ability (sigma(UTS)-sigma(Y) = 246 MPa, sigma(UTS)-sigma(Y) = 0.5),
   which depend on the annealing twins, dislocations, as well as
   micro-shear bands in the grains. Analysis of the fracture surface
   indicates that the main failure mechanism is ductile. Meanwhile, no
   phase separation occurs as the temperature is raised from 0 degrees C to
   1000 degrees C as shown by the expansion rate versus temperature
   relationship, indicating that the materials have good stability at high
   temperature. The thermal expansion coefficient (CTE) of the sample
   annealed at 1100 degrees C for 1 h is 12.1 x 10(-6) K-1 which is less
   than that of traditional metals (14.4-16 x 10(-6) K-1).}},
DOI = {{10.1016/j.intermet.2019.106477}},
Article-Number = {{UNSP 106477}},
ISSN = {{0966-9795}},
EISSN = {{1879-0216}},
ResearcherID-Numbers = {{Chu, Paul K/B-5923-2013}},
ORCID-Numbers = {{Chu, Paul K/0000-0002-5581-4883}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000471355400014}},
}

@article{ ISI:000464017000001,
Author = {Gan, Bin and Wheeler, Jeffrey M. and Bi, Zhongnan and Liu, Lin and
   Zhang, Jun and Fu, Hengzhi},
Title = {{Superb cryogenic strength of equiatomic CrCoNi derived from gradient
   hierarchical microstructure}},
Journal = {{JOURNAL OF MATERIALS SCIENCE \& TECHNOLOGY}},
Year = {{2019}},
Volume = {{35}},
Number = {{6}},
Pages = {{957-961}},
Month = {{JUN}},
Abstract = {{This work demonstrates the effectiveness of a cryogenic torsional
   pre-straining for significantly improving the cryogenic strength of an
   equiatomic CrCoNi alloy. The origin of this phenomenon is elucidated by
   various microstructural characterization tools, which shows that the
   sequential torsion and tension tests lead to the observed hierarchical
   microstructure through the activation of different twinning systems and
   stacking faults. This gives rise to the significant increase in the
   yield strength from 600 MPa to 1215 MPa, while the fracture strain
   changes from 68\% to 48\%. The current study reveals that the
   incorporation of nanotwins architecture by shear deformation may
   constitute a viable strategy to tune the mechanical performance and, in
   particular, to dramatically increase the strength while keeping a good
   ductility. (c) 2019 Published by Elsevier Ltd on behalf of The editorial
   office of Journal of Materials Science \& Technology.}},
DOI = {{10.1016/j.jmst.2018.12.002}},
ISSN = {{1005-0302}},
ResearcherID-Numbers = {{Wheeler, Jeffrey M./O-3972-2019}},
ORCID-Numbers = {{Wheeler, Jeffrey M./0000-0001-7763-2610}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000464017000001}},
}

@article{ ISI:000465193500003,
Author = {Kang, Byungchul and Kong, Taeyeong and Raza, Ahmad and Ryu, Ho Jin and
   Hong, Soon Hyung},
Title = {{Fabrication, microstructure and mechanical property of a novel Nb-rich
   refractory high-entropy alloy strengthened by in-situ formation of
   dispersoids}},
Journal = {{INTERNATIONAL JOURNAL OF REFRACTORY METALS \& HARD MATERIALS}},
Year = {{2019}},
Volume = {{81}},
Pages = {{15-20}},
Month = {{JUN}},
Note = {{15th International Symposium on Novel and Nano Materials (ISNNM),
   Lisbon, PORTUGAL, JUL 01-06, 2018}},
Abstract = {{We fabricated Nb42Mo20Ti13Cr12V12Ta1, a novel refractory high-entropy
   alloy (RHEA) enriched with niobium (Nb), by following a high-energy ball
   milling and spark plasma sintering (SPS) method. The microstructure of
   the bulk RHEA formed a single body-centered cubic (BCC) matrix with
   in-situ-formed carbide dispersoids. The combination of the effect of the
   severe deformations caused by the milling, the short sintering time, and
   the impedance of the grain growth caused by the dispersoids led to the
   formation of nano-sized grains, in spite of the high sintering
   temperature of 1200 degrees C. This resulted in outstanding mechanical
   properties. The bulk Nb42Mo20Ti13Cr12V12Ta1 RHEA exhibits a compressive
   yield strength of 2680 MPa, a maximum strength of 3896 MPa, and a
   Vickers hardness of 741 HV. The excellent mechanical properties of the
   alloy can be attributed to the strengthening of the dispersion and the
   solid solution, coupled with the grain refinement effects.}},
DOI = {{10.1016/j.ijrmhm.2019.02.009}},
ISSN = {{0263-4368}},
ResearcherID-Numbers = {{Ryu, Ho Jin/J-2764-2013}},
ORCID-Numbers = {{Ryu, Ho Jin/0000-0002-3387-7381}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000465193500003}},
}

@article{ ISI:000470046400020,
Author = {Yoshida, Shuhei and Ikeuchi, Takuto and Bhattacharjee, Tilak and Bai, Yu
   and Shibata, Akinobu and Tsuji, Nobuhiro},
Title = {{Effect of elemental combination on friction stress and Hall-Petch
   relationship in face-centered cubic high / medium entropy alloys}},
Journal = {{ACTA MATERIALIA}},
Year = {{2019}},
Volume = {{171}},
Pages = {{201-215}},
Month = {{JUN 1}},
Abstract = {{In this study, we report the effect of elemental combinations on the
   friction stress and Hall-Petch relationship in medium entropy alloys
   (MEAs) and high entropy alloys (HEAs) which are defined as the alloys
   composed of four or less and five or more principal elements,
   respectively, with (near-) equiatomic concentrations. The MEAs
   (CoCrFeNi, CoCrNi, etc.), which are subsystems of equi-atomic
   CoCr-FeMnNi HEA, were highly deformed by high-pressure torsion (HPT) and
   subsequently annealed at different temperatures. The specimens with
   fully-recrystallized microstructures of FCC single-phase with various
   mean grain sizes down to sub-micrometer scale were obtained.
   Subsequently, tensile tests were performed at room temperature to obtain
   precise Hall-Petch relationships and friction stresses of the materials.
   Co-20(CrNi)(80) was successfully predicted as the alloy showing the
   highest strength among the MEAs by the modified Labusch model (so-called
   mean field Labusch model) for solution hardening. Experimental values of
   the friction stresses were found to fit with the model very well,
   indicating that the strength of the alloys was closely related to
   entirely distorted crystal lattice acting as high-density obstacles for
   dislocation motion in the alloys. At the same time, values of the
   average lattice distortion in the alloys were found comparable to those
   in some dilute alloys, although ``severe{''}{''} lattice distortion had
   been believed as a reason for the higher strength than dilute systems.
   Finally, a strengthening mechanism by element-element interaction was
   proposed as an additional mechanism to enhance the strength in FCC HEAs
   and MEAs. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All
   rights reserved.}},
DOI = {{10.1016/j.actamat.2019.04.017}},
ISSN = {{1359-6454}},
EISSN = {{1873-2453}},
ResearcherID-Numbers = {{Tsuji, Nobuhiro/F-7951-2010}},
ORCID-Numbers = {{Tsuji, Nobuhiro/0000-0002-2132-1327}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000470046400020}},
}

@article{ ISI:000462592500014,
Author = {Sekhar, Anand R. and Samal, Sumanta and Nayan, Niraj and Bakshi,
   Srinivasa Rao},
Title = {{Microstructure and mechanical properties of Ti-Al-Ni-Co-Fe based high
   entropy alloys prepared by powder metallurgy route}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{787}},
Pages = {{123-132}},
Month = {{MAY 30}},
Abstract = {{Nano crystalline High Entropy Alloys (HEA) with equi-atomic compositions
   were synthesized through mechanical alloying followed by Spark Plasma
   Sintering (SPS). Alloys with nominal compositions of TiAlNiCo, TiAlNiFe
   and TiAlNiCoFe were selected for the study. Microstructure, hardness and
   room temperature compressive strengths of the alloys were studied. All
   the alloys had a single phase BCC microstructure along with TiCx
   nanoparticles dispersed uniformly in it. The alloys exhibit good
   hardness of more than 700 HV1.0 and a compressive strength more than 2.5
   GPa. (C) 2019 Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2019.02.083}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
ORCID-Numbers = {{Bakshi, Srinivasa Rao/0000-0001-9487-1971}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000462592500014}},
}

@article{ ISI:000461778600018,
Author = {Yurkova, I, A. and Cherniaysky, V. V. and Bolbut, V and Krueger, M. and
   Bogomol, I},
Title = {{Structure formation and mechanical properties of the high-entropy
   AlCuNiFeCr alloy prepared by mechanical alloying and spark plasma
   sintering}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{786}},
Pages = {{139-148}},
Month = {{MAY 25}},
Abstract = {{The phase and structural transformations in equiatomic powder
   compositions of the Al-Cu-Ni-Fe-Cr system during mechanical alloying
   (MA), annealing and subsequent spark plasma sintering (SPS) had been
   studied by X-ray diffraction analysis, scanning and transmission
   electron microscopy, and differential scanning calorimetry. It has been
   established that the nanocrystalline high-entropy AICuNiFeCr alloy
   synthesized during MA consists of a supersaturated solid solution with a
   bcc crystalline structure. After annealing and spark plasma sintering at
   800 degrees C, the alloy becomes three-phased, and consists mainly of
   one B2-ordered solid solution, one fcc solid solution (25 wt \%), and of
   the (Cr, Fe)(23)C-6 phase (8 wt \%). The Vickers hardness of the
   sintered AICuNiFeCr alloy was 8.35 GPa, and the compressive strength at
   room temperature reached 1960 MPa. (C) 2019 Elsevier B.V. All rights
   reserved.}},
DOI = {{10.1016/j.jallcom.2019.01.341}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
ResearcherID-Numbers = {{Bogomol, Iurii/L-7302-2018}},
ORCID-Numbers = {{Bogomol, Iurii/0000-0001-6633-0078}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000461778600018}},
}

@article{ ISI:000467669000031,
Author = {Gu, Ji and Ni, Song and Liu, Yong and Song, Min},
Title = {{Regulating the strength and ductility of a cold rolled FeCrCoMnNi
   high-entropy alloy via annealing treatment}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{755}},
Pages = {{289-294}},
Month = {{MAY 7}},
Abstract = {{An equiatomic FeCrCoMnNi high-entropy alloy was processed by cold
   rolling and then isochronous annealing treatments. The dependence of the
   tensile properties and microstructure of the alloy on the annealing
   temperature was investigated. Long-range ordered structure, Cr-rich
   precipitates, heterogeneous structure with different recrystallization
   degrees, and homogeneous structure with different grain sizes can be
   obtained via regulating the annealing temperature. It is operable to
   obtain optimal microstructure of the alloy and thus beneficial to the
   mechanical properties by varying the annealing temperature. This work
   provides a new concept to fabricating FeCrCoMnNi alloy with a
   combination of high strength and large ductility.}},
DOI = {{10.1016/j.msea.2019.04.025}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
ORCID-Numbers = {{Gu, Ji/0000-0001-7819-1220}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000467669000031}},
}

@article{ ISI:000463127300027,
Author = {Jiang, L. and Lu, Y. P. and Song, M. and Lu, C. and Sun, K. and Cao, Z.
   Q. and Wang, T. M. and Gao, F. and Wang, L. M.},
Title = {{A promising CoFeNi2V0.5Mo0.2 high entropy alloy with exceptional
   ductility}},
Journal = {{SCRIPTA MATERIALIA}},
Year = {{2019}},
Volume = {{165}},
Pages = {{128-133}},
Month = {{MAY}},
Abstract = {{A novel high entropy alloy with the composition of CoFeNi2V0.5Mo0.2,
   shows unusual strain hardening ability and an excellent combination of
   ductility and strength. Especially at 873 K, the elongation can reach
   189.2\%, almost three times that of the common high temperature alloys.
   Microstructural characterization suggests a coexistence of planar slip
   and cross slip. The resistance of planar slip serves to strengthen the
   alloy, while the cross slip effectively relieves strain concentration,
   substantially contributing to the uniform elongation. Also, the
   interaction of planar slip and cross slip will lead to the formation of
   two kinds of dislocation loops. (C) 2019 Acta Materialia Inc. Published
   by Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.scriptamat.2019.02.038}},
ISSN = {{1359-6462}},
ResearcherID-Numbers = {{Song, Miao/Q-5572-2018}},
ORCID-Numbers = {{Song, Miao/0000-0003-3672-0707}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000463127300027}},
}

@article{ ISI:000459340700004,
Author = {Ma, Lili and Gao, Zijun and Hu, Shaohong and Zeng, Zhigang and Xu,
   Junjun and Wang, Jianing},
Title = {{Effect of cooling rate on microstructure and mechanical properties of
   Al0.3CoCrFeNi high-entropy alloy}},
Journal = {{MATERIALS RESEARCH EXPRESS}},
Year = {{2019}},
Volume = {{6}},
Number = {{5}},
Month = {{MAY}},
Abstract = {{The influence of cooling rate on the microstructure and mechanical
   properties of Al0.3CoCrFeNi high-entropy alloys was systematically
   investigated. By adjusting preparation methods and the size of the
   alloys, three cooling rates, similar to 2.5 K s(-1), similar to 40 K
   s(-1)and similar to 10(3)K s(-1), were achieved. The alloys were
   monophasic and retained the FCC structure under the three cooling rates,
   whereas a clear refinement of the microstructure and even distribution
   of elements was observed with an increase in cooling rate. In addition,
   the hardness of the alloys increased from 132 HV to 165 HV and the yield
   strength increased from 300 MPa to 430 MPa when the cooling rate was
   increased from similar to 2.5 K s(-1) to similar to 10(3) K s(-1),
   amounting to 25\% and 48\% increases, respectively. The improvement in
   the hardness and strength of the Al0.3CoCrFeNi high-entropy alloys was
   primarily attributed to fine-grain strengthening.}},
DOI = {{10.1088/2053-1591/ab0597}},
Article-Number = {{056540}},
ISSN = {{2053-1591}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000459340700004}},
}

@article{ ISI:000467668600035,
Author = {Tian, Quanwei and Zhang, Guojin and Yin, Kexin and Wang, Wenwen and
   Cheng, Weili and Wang, Yinong},
Title = {{The strengthening effects of relatively lightweight AlCoCrFeNi high
   entropy alloy}},
Journal = {{MATERIALS CHARACTERIZATION}},
Year = {{2019}},
Volume = {{151}},
Pages = {{302-309}},
Month = {{MAY}},
Abstract = {{In this paper, relatively lightweight AlCoCrFeNi HEA ingots with
   different initial microstructures were fabricated by utilizing the
   cooling rate effect. The associated mechanical properties and
   strengthening response are also reported. The body-centered cubic (BCC)
   AlCoCrFeNi HEAs solidified dendritically, and the dendrite (DR) regions
   were surrounded by the inter-dendrite (ID) regions. The volume fraction
   of the DR regions of the alloy formed via arc-melting was higher than
   those of their counterparts produced via levitation melting, which is
   considered to have a strong dependence on the cooling rate effect. In
   addition, the compressive properties were significantly influenced by
   the ratio of volume fraction of ID and DR regions, as well as the
   morphologies of the disordered body-centered cubic (A2) and ordered
   body-centered cubic (B2) phases. The alloy formulated via levitation
   melting exhibited higher hardness and compressive yield strength (YS)
   than the arc-melting alloy, at the expense of plasticity. The
   strengthening effects including grain boundary strengthening,
   dislocation strengthening, solid solution strengthening, and
   precipitation strengthening were estimated and compared with the
   experimental measurements.}},
DOI = {{10.1016/j.matchar.2019.03.006}},
ISSN = {{1044-5803}},
EISSN = {{1873-4189}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000467668600035}},
}

@article{ ISI:000457845900009,
Author = {Bae, Jae Wung and Park, Jeong Min and Moon, Jongun and Choi, Won Mi and
   Lee, Byeong-Joo and Kim, Hyoung Seop},
Title = {{Effect of mu-precipitates on the microstructure and mechanical
   properties of non-equiatomic CoCrFeNiMo medium-entropy alloys}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{781}},
Pages = {{75-83}},
Month = {{APR 15}},
Abstract = {{Non-equiatomic Co17.5Cr12.5Fe55Ni10Mo5 (Mo5) and Ca18Cr12.5Fe55Ni7Mo7.5
   (Mo7.5) medium-entropy alloys were synthesized by vacuum induction
   melting, cold rolling, and subsequent annealing treatment at various
   temperatures (900-1200 degrees C) and they were investigated to exploit
   the precipitation strengthening in addition to solid solution
   strengthening of alloys. The effect of annealing temperature and Mo
   content on the microstructure and mechanical properties are
   systematically analyzed. From the microstructural analysis, a Mo-rich mu
   phase is observed in the face-centered cubic (fcc) matrix. Increasing
   the Mo content and low annealing temperature enhance the formation of mu
   phase, which is consistent with the thermodynamic calculation results.
   The formation of mu phase effectively enhances the strength of the Mo7.5
   alloy by precipitation strengthening, and suppression of grain growth
   and recrystallization by Zener pinning effect. These lead to superior
   combination of tensile strength as high as 1100 MPa and large ductility.
   Our results provide insights not only into mu-phase strengthening of
   fcc-structured alloys, but also into the future development of
   high-performance MEAs. (C) 2018 Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2018.12.040}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
ResearcherID-Numbers = {{Kim, Hyoung Seop/C-2166-2009
   Bae, Jae Wung/X-8426-2019}},
ORCID-Numbers = {{Kim, Hyoung Seop/0000-0002-3155-583X
   Bae, Jae Wung/0000-0001-5034-5435}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000457845900009}},
}

@article{ ISI:000456789000102,
Author = {Laurent-Brocq, M. and Goujon, P. -A. and Monnier, J. and Villeroy, B.
   and Perriere, L. and Pires, R. and Garcin, G.},
Title = {{Microstructure and mechanical properties of a CoCrFeMnNi high entropy
   alloy processed by milling and spark plasma sintering}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{780}},
Pages = {{856-865}},
Month = {{APR 5}},
Abstract = {{Powder metallurgy is a promising processing path to produce high entropy
   alloys (HEA) with improved mechanical properties. According to this, a
   bulk CoCrFeMnNi alloy was milled with a wide range of conditions. It was
   shown that a powder which is micronic, approximately spherical and with
   nanometric crystallites could be produced by a cryo-milling which was
   followed by a short duration planetary milling. Next, this powder was
   fully densifIed by spark plasma sintering. According to X-ray
   diffraction, the single phase of the bulk alloy remains stable during
   both milling and sintering. However, carbides and oxides precipitate
   during sintering, as shown by scanning electron microscopy coupled with
   energy dispersive spectroscopy. Electron backscattered diffraction
   evidences that those precipitates limit the growth of grains. By
   nanoindentation measurements, it was shown that preparing a CoCrFeMnNi
   HEA by milling and sintering significantly increases the hardness
   compared to conventional processing by melting and casting. Moreover,
   the different strengthening contributions were calculated and analyzed.
   It revealed that grains have a strengthening contribution as described
   by the Hall \& Petch law, contrary to crystallites. (C) 2018 Elsevier
   B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2018.11.181}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
ResearcherID-Numbers = {{Perriere, Loic/A-4415-2013
   Perriere, Loic/P-3673-2019}},
ORCID-Numbers = {{Perriere, Loic/0000-0002-8635-5069
   Perriere, Loic/0000-0002-8635-5069}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000456789000102}},
}

@article{ ISI:000455544800049,
Author = {Guo, Zhiming and Zhang, Aijun and Han, Jiesheng and Meng, Juhu},
Title = {{Effect of Si additions on microstructure and mechanical properties of
   refractory NbTaWMo high-entropy alloys}},
Journal = {{JOURNAL OF MATERIALS SCIENCE}},
Year = {{2019}},
Volume = {{54}},
Number = {{7}},
Pages = {{5844-5851}},
Month = {{APR}},
Abstract = {{To improve the high-temperature strength and decrease the density of
   NbTaWMo alloys, addition of light element Si producing the second-phase
   silicide is employed. Refractory NbTaWMoSix (x=0, 0.25, 0.5, 0.75)
   high-entropy alloys are produced by spark plasma sintering. The phase
   evolution, microstructure, compressive mechanical properties, and
   high-temperature hardness are investigated in this study. It reveals
   that there is only a disordered body-centered cubic (BCC) phase in the
   matrix NbTaWMo alloy. After adding the Si element, NbTaWMoSix alloys
   demonstrate the presence of multiphase structure: disordered BCC phase
   and silicide phase. As the content of Si is increased, the proportion of
   silicide is increased, which improves the hardness and strength. The
   addition of Si at certain concentration (x=0.25 and 0.5) has positive
   effect on ductility of the alloys. The alloys all demonstrate brittle
   fracture due to the brittle phase of BCC and silicide phase. The
   high-temperature hardness of NbTaWMoSix alloys is increased with the
   addition of Si, but the same alloy presents a slightly decreasing
   phenomenon as the temperature improves.}},
DOI = {{10.1007/s10853-018-03280-z}},
ISSN = {{0022-2461}},
EISSN = {{1573-4803}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000455544800049}},
}

@article{ ISI:000467433000053,
Author = {Shabani, Ali and Toroghinejad, Mohammad Reza and Shafyei, Ali and Loge,
   Roland E.},
Title = {{Microstructure and Mechanical Properties of a Multiphase FeCrCuMnNi
   High-Entropy Alloy}},
Journal = {{JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE}},
Year = {{2019}},
Volume = {{28}},
Number = {{4, SI}},
Pages = {{2388-2398}},
Month = {{APR}},
Abstract = {{A FeCrCuMnNi high-entropy alloy was produced using vacuum induction
   melting, starting from high-purity raw materials. The microstructure and
   mechanical properties of the as-cast FeCrCuMnNi alloy were studied,
   considering x-ray diffraction (XRD), scanning electron microscopy, and
   hardness and tensile tests. XRD results revealed the existence of two
   FCC phases and one BCC phase. Microstructural evaluation illustrated
   that the as-cast alloy has a typical cast dendritic structure, where
   dendrite regions (BCC) were enriched in Cr and Fe. Interdendritic
   regions were saturated with Cu and Ni and revealed G/B(T) \{110\}< 111 >
   and Brass \{110\}< 112 > as the major texture components. The produced
   alloy revealed an excellent compromise in mechanical properties due to
   the mixture of solid solution phases with different structures: 300HV
   hardness, 950MPa ultimate tensile strength and 14\% elongation.
   Microhardness test results also revealed that the BCC phase was the
   hardest phase. The fracture surface evidenced a typical ductile failure.
   Furthermore, heat treatment results revealed that phase composition
   remained stable after annealing up to 650 degrees C. Phase
   transformation occurred at higher temperatures in order to form more
   stable phases; therefore, FCC2 phase grew at the expense of the BCC
   phase.}},
DOI = {{10.1007/s11665-019-04003-4}},
ISSN = {{1059-9495}},
EISSN = {{1544-1024}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000467433000053}},
}

@article{ ISI:000468338800004,
Author = {Torralba, J. M. and Alvaredo, P. and Garcia-Junceda, Andrea},
Title = {{High-entropy alloys fabricated via powder metallurgy. A critical review}},
Journal = {{POWDER METALLURGY}},
Year = {{2019}},
Volume = {{62}},
Number = {{2}},
Pages = {{84-114}},
Month = {{MAR 15}},
Abstract = {{High-entropy alloys (HEAs) have attracted a great deal of interest over
   the last 14 years. One reason for this level of interest is related to
   these alloys breaking the alloying principles that have been applied for
   many centuries. Thus, HEAs usually possess a single phase (contrary to
   expectations according to the composition of the alloy) and exhibit a
   high level of performance in different properties related to many
   developing areas in industry. Despite this significant interest, most
   HEAs have been developed via ingot metallurgy. More recently, powder
   metallurgy (PM) has appeared as an interesting alternative for further
   developing this family of alloys to possibly widen the field of
   nanostructures in HEAs and improve some capabilities of these alloys. In
   this paper, PM methods applied to HEAs are reviewed, and some possible
   ways to develop the use of powders as raw materials are introduced.}},
DOI = {{10.1080/00325899.2019.1584454}},
ISSN = {{0032-5899}},
EISSN = {{1743-2901}},
ResearcherID-Numbers = {{Torralba, Jose Manuel/A-9033-2012
   }},
ORCID-Numbers = {{Torralba, Jose Manuel/0000-0003-2032-4144
   Garcia-Junceda, Andrea/0000-0003-4100-8730}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000468338800004}},
}

@article{ ISI:000454856800140,
Author = {Wei, Qinqin and Shen, Qiang and Zhang, Jian and Zhang, Yin and Luo,
   Guoqiang and Zhang, Lianmeng},
Title = {{Microstructure evolution, mechanical properties and strengthening
   mechanism of refractory high-entropy alloy matrix composites with
   addition of TaC}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{777}},
Pages = {{1168-1175}},
Month = {{MAR 10}},
Abstract = {{This study focuses on novel refractory MoNbRe0.5W(TaC)(x), high-entropy
   alloy matrix composites synthesized by vacuum arc melting. The
   microstructure evolution, compressive mechanical properties at room
   temperature and strengthening mechanism of the composites with addition
   of TaC are analyzed and discussed. The MoNbRe0.5W(TaC)(x) composites
   consist of a BCC solid solution as the matrix and an eutectic
   microstructure (BCC and multi-component carbide (Mo, Nb, W, Ta)C phases)
   at grain boundaries. The lamellar eutectic structure would be formed
   from the decomposition of subcarbide (Mo, Nb, W, Ta)(2)C and the fully
   solid solubility of Re. The MoNbRe0.5W(TaC)(0.5 )composite has the
   maximum failure strain of 10.25\%. The MoNbRe0.5W(TaC)(0.5 )to
   MoNbRe0.5W(TaC)(0.6 ) composites exhibit excellent comprehensive
   mechanical properties, with excellent strength and reasonable ductility
   at room temperature. The reinforcement mechanism of the composites is
   dominated by precipitation and fine-grained strengthening effect. The
   good ductility of MoNbRe0.5W(TaC)(0.5 ) composite is contributed to the
   grain refinement of the BCC matrix phase. (C) 2018 Elsevier B.V. All
   rights reserved.}},
DOI = {{10.1016/j.jallcom.2018.11.111}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000454856800140}},
}

@article{ ISI:000455518100010,
Author = {Dong, Yong and Lu, Yiping},
Title = {{Microstructure and Mechanical Properties of CoCrFeNi2Al1-xWx High
   Entropy Alloys}},
Journal = {{ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING}},
Year = {{2019}},
Volume = {{44}},
Number = {{2}},
Pages = {{803-808}},
Month = {{FEB}},
Abstract = {{The microstructures, phase composition, and mechanical properties of the
   CoCrFeNi2Al1-xWx (x: molar ratio, x=0, 0.2, and 0.3) high entropy alloys
   were investigated. Only BCC phase and FCC phase were found in
   CoCrFeNi2Al1-xWx alloys. Thereinto, the CoCrFeNi2Al alloy was comprised
   of the primary phase with BCC structure and the eutectic structures with
   BCC and FCC phases. The CoCrFeNi2Al0.9W0.1, CoCrFeNi2Al0.8W0.2, and
   CoCrFeNi2Al0.7W0.3 alloys were comprised of the primary phase with FCC
   structure and the eutectic structures with BCC and FCC phases. The main
   effect of Al element on CoCrFeNi2Al1-xWx alloys was tailoring the
   proportion of BCC phase and FCC phase, while W element played a greater
   role than Al element in the solid solution strengthening effect. Hence,
   the mechanical properties of AlCoCrFeNi2 alloy can be tailored by
   adjusting the concentration of Al and W elements to obtain a wider range
   of applications.}},
DOI = {{10.1007/s13369-018-3297-9}},
ISSN = {{2193-567X}},
EISSN = {{2191-4281}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000455518100010}},
}

@article{ ISI:000460742200070,
Author = {Haas, Sebastian and Manzoni, Anna M. and Krieg, Fabian and Glatzel, Uwe},
Title = {{Microstructure and Mechanical Properties of Precipitate Strengthened
   High Entropy Alloy Al10Co25Cr8Fe15Ni36Ti6 with Additions of Hafnium and
   Molybdenum}},
Journal = {{ENTROPY}},
Year = {{2019}},
Volume = {{21}},
Number = {{2}},
Month = {{FEB}},
Abstract = {{High entropy or compositionally complex alloys provide opportunities for
   optimization towards new high-temperature materials. Improvements in the
   equiatomic alloy Al17Co17Cr17Cu17Fe17Ni17 (at.\%) led to the base alloy
   for this work with the chemical composition Al10Co25Cr8Fe15Ni36Ti6
   (at.\%). Characterization of the beneficial particle-strengthened
   microstructure by scanning electron microscopy (SEM) and observation of
   good mechanical properties at elevated temperatures arose the need of
   accomplishing further optimization steps. For this purpose, the
   refractory metals hafnium and molybdenum were added in small amounts
   (0.5 and 1.0 at.\% respectively) because of their well-known positive
   effects on mechanical properties of Ni-based superalloys. By correlation
   of microstructural examinations using SEM with tensile tests in the
   temperature range of room temperature up to 900 degrees C, conclusions
   could be drawn for further optimization steps.}},
DOI = {{10.3390/e21020169}},
Article-Number = {{169}},
ISSN = {{1099-4300}},
ORCID-Numbers = {{Glatzel, Uwe/0000-0002-9637-2727}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000460742200070}},
}

@article{ ISI:000457510300064,
Author = {Asghari-Rad, Peyman and Sathiyamoorthi, Praveen and Bae, Jae Wung and
   Moon, Jongun and Park, Jeong Min and Zargaran, Alireza and Kim, Hyoung
   Seop},
Title = {{Effect of grain size on the tensile behavior of V10Cr15Mn5Fe35Co10Ni25
   high entropy alloy}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{744}},
Pages = {{610-617}},
Month = {{JAN 28}},
Abstract = {{In the present study, V10Cr15Mn5Fe35Co10Ni25 (at\%) high-entropy alloy
   (HEA) of a single phase face-centered cubic structure with various grain
   sizes was fabricated. The influences of grain size on the work-hardening
   behavior and deformation mechanisms were investigated. The fine-grained
   and coarse-grained samples showed different work hardening behaviors
   during room temperature tensile deformation. Microstructural analysis
   revealed the presence of a high-density tangled dislocation structure
   without any mechanical twinning in the fine-grained sample, while
   mechanical twinning was observed to be the additional deformation
   mechanism in the coarse-grained sample.}},
DOI = {{10.1016/j.msea.2018.12.077}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
ResearcherID-Numbers = {{Kim, Hyoung Seop/C-2166-2009
   Sathiyamoorthi, Praveen/I-8421-2015
   Bae, Jae Wung/X-8426-2019
   Asghari-Rad, Peyman/Y-4190-2019}},
ORCID-Numbers = {{Kim, Hyoung Seop/0000-0002-3155-583X
   Sathiyamoorthi, Praveen/0000-0001-8803-3509
   Bae, Jae Wung/0000-0001-5034-5435
   Asghari-Rad, Peyman/0000-0002-8030-1684}},
Times-Cited = {{1}},
Unique-ID = {{ISI:000457510300064}},
}

@article{ ISI:000482184100141,
Author = {Rogachev, A. S. and Vadchenko, S. G. and Kochetov, N. A. and Rouvimov,
   S. and Kovalev, D. Yu and Shchukin, A. S. and Moskovskikh, D. O. and
   Nepapushev, A. A. and Mukasyan, A. S.},
Title = {{Structure and properties of equiatomic CoCrFeNiMn alloy fabricated by
   high-energy ball milling and spark plasma sintering}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{805}},
Pages = {{1237-1245}},
Month = {{OCT 15}},
Abstract = {{High-entropy alloy CoCrFeNiMn was produced by short high energy ball
   milling (90 min) and spark plasma sintering (10 min at 1073 K).
   Co-existence of two fcc-phases with lattice parameters 0.360 nm and
   0.356 nm was demonstrated via HRTEM, XRD and other methods. The matrix
   fcc-phase with larger parameter transforms into the more compact phase
   during annealing up to 1273 K. Similar transformation partially occurs
   after SPS. Some elements, mostly Cr and Mn, released from the matrix
   phase and formed precipitates. Up to three types of precipitates, with
   characteristic size from 10-30 nm to 200-300 nm, have been detected and
   studied. Electric and thermal properties of the material, measured at
   room and elevated temperature, shown that lattice thermal conductivity
   plays an important role, along with free electron thermal conductivity.
   (C) 2019 Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2019.07.195}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000482184100141}},
}

@article{ ISI:000482184100064,
Author = {Zhao, Yong and Wang, Mingliang and Cui, Hongzhi and Zhao, Yqiao and
   Song, Xiaojie and Zeng, Yong and Gao, Xiaohua and Lu, Feng and Wang,
   Canming and Song, Qiang},
Title = {{Effects of Ti-to-Al ratios on the phases, microstructures, mechanical
   properties, and corrosion resistance of Al2-xCoCrFeNiTix high-entropy
   alloys}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{805}},
Pages = {{585-596}},
Month = {{OCT 15}},
Abstract = {{The Al2-xCoCrFeNiTix (x = 0, 0.2, 0.5, 0.8, 1.0, and 1.2) high-entropy
   alloys (HEAs) were prepared via vacuum arc melting. With the increase of
   the molar ratios of Ti-to-Al, the phases, microstructures, mechanical
   properties, and corrosion resistance of the HEAs were changed. The
   microstructures were transformed from BCC1+B2, and BCC2+BCC1+B2, to
   BCC2+Laves + BCC1 phases. The addition of Ti, on the one hand promoted
   the formation of another BCC phase and Laves phase, and on the other
   hand refined the microstructure of the as-cast alloys. Good
   comprehensive mechanical properties with the highest compressive
   fracture strength of 1919 MPa and fracture strains of 11.85\% were
   obtained in the Al1.5CoCrFeNiTi0.5 alloy. With further increase in the
   ratio of Ti, the fracture strength and strains of the HEAs decreased
   because of the increase in the fraction and the size of the brittle
   Laves phase. Furthermore, compared with the Ti-free Al2CoCrFeNi alloy,
   all Ti-containing Al2-xCoCrFeNiTix alloys exhibited higher pitting
   corrosion resistance with a wide passive window. The existence of noble
   and unoxidized metal atoms in the passive film, particularly Ti,
   enhanced the alloy's resistance to pitting corrosion. Our report
   provides an effective method for the design of high Al-content HEAs to
   balance the strength-ductility trade-off and improve the pitting
   corrosion resistance synergistically. (C) 2019 Elsevier B.V. All rights
   reserved.}},
DOI = {{10.1016/j.jallcom.2019.07.100}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000482184100064}},
}

@article{ ISI:000476464900123,
Author = {Jafary-Zadeh, Mehdi and Khoo, Khoong Hong and Laskowski, Robert and
   Branicio, Paulo S. and Shapeev, V, Alexander},
Title = {{Applying a machine learning interatomic potential to unravel the effects
   of local lattice distortion on the elastic properties of multi-principal
   element alloys}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{803}},
Pages = {{1054-1062}},
Month = {{SEP 30}},
Abstract = {{The concept of local lattice distortion (LLD) is of fundamental
   importance in the understanding of properties of high-entropy alloys
   and, more generally, of multi-principal element alloys (MPEAs). Despite
   previous experimental and computational efforts, the unambiguous
   evaluation of the static (due to atomic size difference) and dynamic
   (due to thermal fluctuation) LLD is still elusive. Here, as a first
   step, we develop a machine learning interatomic potential based on an
   efficient ``learning-on-the-fly{''} scheme for CoFeNi, a prototypical
   ternary MPEA. Using this potential, we perform molecular dynamics
   simulations to calculate the elastic moduli of single- and
   polycrystalline CoFeNi. The results are in excellent agreement with
   theoretical and experimental data. As a second step, we design a
   simulation framework allowing the determination of the effects of static
   and dynamic LLD, thermal expansion, and chemical short-range order on
   the elastic properties of our prototypical MPEA. The results indicate
   that not only the average value of LLD, but also its probability
   distribution affect the elastic properties of MPEAs. In addition, we
   show that a variety of commonly used LLD indicators, e.g., atomic
   strain, pair distribution function, and bond-length distribution,
   correlate with each other. Our results not only shed light on the of LLD
   in MPEAs, but also demonstrate the capabilities of our machine learning
   potential as a powerful tool for the development and characterization of
   novel alloys with designed properties. (C) 2019 Published by Elsevier
   B.V.}},
DOI = {{10.1016/j.jallcom.2019.06.318}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
ResearcherID-Numbers = {{Branicio, Paulo/E-5632-2011}},
ORCID-Numbers = {{Branicio, Paulo/0000-0002-8676-3644}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000476464900123}},
}

@article{ ISI:000476464900055,
Author = {Liang, Jui-Ting and Cheng, Kuei-Chung and Chen, Shih-Hsun},
Title = {{Effect of heat treatment on the phase evolution and mechanical
   properties of atomized AlCoCrFeNi high-entropy alloy powders}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{803}},
Pages = {{484-490}},
Month = {{SEP 30}},
Abstract = {{In this study, gas-atomized AlCoCrFeNi high-entropy alloy (HEA) powders
   were prepared by gas atomization process instead of ball milling method
   and the variations of annealing temperature on the crystal structure,
   microstructure, phase evolution and mechanical properties were
   investigated. This equatomic HEAs powder possesses an initial phase of
   BCC while the FCC and minor sigma phases could be adjusted via the
   annealing treatment. After the annealing process at 900 degrees C over 3
   h, the phase constitution of gas-atomized AlCoCrFeNi gradually reached
   its stable state, composed of FCC + BCC phases. The BCC phase was
   identified as one kind of FeCo compound and served as the base of
   AlCoCrFeNi HEAs. During the annealing process, Cr element was separated
   and (Al, Ni)-rich phases were distributed in the uniform FeCo base.
   Based on such a microstructure, we found that the precipitated FCC and
   sigma phases can lead to a significant increase of the mechanical
   performance of AlCoCrFeNi HEA. In summary, our results suggest that the
   precipitation hardening is an important mechanism for obtaining a high
   strength AlCoCrFeNi HEA alloy. (C) 2019 Elsevier B.V. All rights
   reserved.}},
DOI = {{10.1016/j.jallcom.2019.06.301}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000476464900055}},
}

@article{ ISI:000476464900090,
Author = {Wang, Meng and Ma, Zhaolong and Xu, Ziqi and Cheng, Xingwang},
Title = {{y Microstructures and mechanical properties of HfNbTaTiZrW and
   HfNbTaTiZrMoW refractory high-entropy alloys}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{803}},
Pages = {{778-785}},
Month = {{SEP 30}},
Abstract = {{W and Mo are added to the HfNbTaTiZr high entropy alloy to improve its
   high-temperature performance. Microstructures, and mechanical properties
   of new refractory high-entropy alloys, HfNbTaTiZrW (H-W) and
   HfNbTaTiZrMoW (H-MoW), were studied. W and/or Mo additions broaden the
   two-phases temperature range and introduced two disordered BCC phases in
   contrast with the single BCC phase in HfNbTaTiZr. Attributing to the
   dual-phases microstructure and the strong solid solution strengthening
   effect, H-W and H-MoW exhibit substantially improved yield strengths at
   25-1200 degrees C compared with HfNbTaTiZr. Particularly, at 1200
   degrees C, H-W and H-MoW show yield strengths of 345 MPa and 703 MPa,
   which are much higher than 92 MPa of HfNbTaTiZr. No phase change happens
   during compressive tests at high temperatures, indicating good phase
   stabilities of H-W and H-MoW alloys. (C) 2019 Elsevier B.V. All rights
   reserved.}},
DOI = {{10.1016/j.jallcom.2019.06.138}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
ORCID-Numbers = {{Cheng, Xingwang/0000-0002-0730-6884}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000476464900090}},
}

@article{ ISI:000480572200005,
Author = {Hu, Yu-Min and Liu, Xiao-Dong and Guo, Na-Na and Wang, Liang and Su,
   Yan-Qing and Guo, Jing-Jie},
Title = {{Microstructure and mechanical properties of NbZrTi and NbHfZrTi alloys}},
Journal = {{RARE METALS}},
Year = {{2019}},
Volume = {{38}},
Number = {{9}},
Pages = {{840-847}},
Month = {{SEP}},
Abstract = {{Two medium-entropy alloys, NbZrTi and NbHfZrTi, were prepared by arc
   melting. Both NbZrTi and NbHfZrTi alloys are composed of simple
   body-centered cubic (bcc) solid solution phase and exhibit dendritic
   structure. After being homogenized, both NbZrTi and NbHfZrTi alloys are
   still composed of the single bcc solid solution phase, but the
   microstructure of the two alloys transforms from the dendritic structure
   into the polycrystalline structure. Two alloys display significantly
   work-hardening effect during compression at room temperature and show
   relatively good deformation plasticity during compressive deformation at
   room temperature. For NbZrTi and NbHfZrTi alloys, the dynamic
   recrystallized grains form along the boundary during compression at the
   temperatures of 1073 and 1273 K.}},
DOI = {{10.1007/s12598-019-01310-6}},
ISSN = {{1001-0521}},
EISSN = {{1867-7185}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000480572200005}},
}

@article{ ISI:000480376800024,
Author = {Niu, Zuozhe and Xu, Juan and Wang, Tao and Wang, Nairan and Han, Zihan
   and Wang, Yan},
Title = {{Microstructure, mechanical properties and corrosion resistance of
   CoCrFeNiWx (x=0, 0.2, 0.5) high entropy alloys}},
Journal = {{INTERMETALLICS}},
Year = {{2019}},
Volume = {{112}},
Month = {{SEP}},
Abstract = {{In this study, the microstructures, microhardness, compression
   performance and corrosion resistance of CoCrFeNiWx (x = 0, 0.2, 0.5,
   denoted as W-free, W-0.2, and W-0.5, respectively) high-entropy alloys
   (HEAs) have been studied. Intensive studies show that W addition leads
   the severe lattice distortion, and thus aggravates the driving force of
   composition decomposition for W-free HEA. The dual-phase with
   face-centered cubic (FCC) microstructure in W-0.2 and W-0.5 HEAs was
   identified. In addition, a mu-(FeCoCr)(7)W-6 phase precipitate from the
   matrix in W-0.5 HEA. Moreover, the 11.12 at.\% W addition induces the
   formation of cell dendrites and eutectic inter-dendrites with fine
   laminar spacing in W-0.5 HEA. W addition obviously decreases the grain
   size, and enhances the microhardness and yield strength of W-free HEA.
   The W-0.5 HEA has the high microhardness of 357.9 HV and yield strength
   of 556 MPa, while maintaining the reasonable fracture strain of 35.6\%.
   The strengthening mechanism of mechanical properties can be attributed
   to the grain refinement strengthening, solid-solution strengthening, and
   interface hardening. The enhancements of the latter two strengthening
   effects depend upon the existence of dual FCC phases. The pitting
   resistance of the containing-W HEAs is enhanced in seawater solution
   compared with W-free HEA. Especially, the W-0.5 HEA bears the best
   pitting resistance and easy passivation behavior, owing to that W
   addition improves the stability of the protective layer.}},
DOI = {{10.1016/j.intermet.2019.106550}},
Article-Number = {{UNSP 106550}},
ISSN = {{0966-9795}},
EISSN = {{1879-0216}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000480376800024}},
}

@article{ ISI:000477005900001,
Author = {Xiang, Chao and Zhang, Zhi-Ming and Fu, Hua-Meng and Han, En-Hou and
   Wang, Jian-Qiu and Zhang, Hai-Feng and Hu, Guo-Dong},
Title = {{Microstructure, Mechanical Properties, and Corrosion Behavior of
   MoNbFeCrV, MoNbFeCrTi, and MoNbFeVTi High-Entropy Alloys}},
Journal = {{ACTA METALLURGICA SINICA-ENGLISH LETTERS}},
Year = {{2019}},
Volume = {{32}},
Number = {{9}},
Pages = {{1053-1064}},
Month = {{SEP}},
Abstract = {{The development of high-entropy alloys (HEAs) has stimulated an
   ever-increasing interest from both academia and industries. In this
   work, three novel MoNbFeCrV, MoNbFeCrTi, and MoNbFeVTi HEAs containing
   low thermal neutron absorption cross section elements were prepared by
   vacuum arc melting. The microstructure, mechanical properties, and
   corrosion behaviors were investigated. A dominant body-centered cubic
   (BCC) phase was present in all these three HEAs. In addition, an ordered
   Laves phase was found to be another major phase in both MoNbFeCrV and
   MoNbFeCrTi alloys, whereas an ordered BCC (B2) phase was observed in the
   MoNbFeVTi alloy. The phase formation in these three alloys was
   discussed. It is found that the formation of the secondary phase in
   these alloys is mainly ascribed to the large atomic size difference and
   electronegativity difference. All the three HEAs show high hardness,
   high yield strength but limited plasticity. Moreover, the MoNbFeCrV,
   MoNbFeCrTi and MoNbFeVTi alloys exhibit excellent corrosion resistance
   in both deaerated 1mol/L NaCl and 0.5mol/L H2SO4 solutions at room
   temperature. However, further composition adjustment and/or
   thermomechanical processing is required to enhance the mechanical
   properties of the three alloys.}},
DOI = {{10.1007/s40195-019-00935-x}},
ISSN = {{1006-7191}},
EISSN = {{2194-1289}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000477005900001}},
}

@article{ ISI:000483411900006,
Author = {Zhang, Kai and Wen, Hongyuan and Zhao, Bingbing and Dong, Xianping and
   Zhang, Lanting},
Title = {{Precipitation behavior and its impact on mechanical properties in an
   aged carbon-containing Al0.3Cu0.5CrFeNi2 high-entropy alloy}},
Journal = {{MATERIALS CHARACTERIZATION}},
Year = {{2019}},
Volume = {{155}},
Month = {{SEP}},
Abstract = {{A cost-effective Al0.3Cu0.5FeCrNi2 high entropy alloy with carbon
   exhibits excellent balance of strength and ductility, i.e. high product
   of strength and elongation (35.3-51.4 GPa\%) is achieved in the aged
   alloys. Three different types of precipitations have been found to
   precipitate at different temperatures. The study showed that the carbon
   content of 0.073 at.\% was enough to promote the formation of M23C6
   phase, which had a preference to precipitate at the grain boundary. With
   the contribution of M23C6 carbides, the yield strength and ultimate
   tensile strength of the sample aged at 900 degrees C increased by 193
   MPa and 415 MPa, respectively, compared to the solid solutionized
   sample, while its elongation remained as high as 88\%. Nanoscale
   L1(2)-ordered precipitates occurred in the alloy after aging at 700 and
   550 degrees C. Cu-rich phase was only found in the alloy aged at 700
   degrees C, and its precipitation kinetics is slower than that of the
   L1(2) phase. The synergetic strengthening of the coherent M23C6 carbides
   at grain boundaries and L1(2) and Cu-rich particles in the matrix of the
   alloys aged at 700 degrees C rendered the highest strength (904 MPa)
   while sustaining a high elongation of 39\% at room temperature.}},
DOI = {{10.1016/j.matchar.2019.109792}},
Article-Number = {{UNSP 109792}},
ISSN = {{1044-5803}},
EISSN = {{1873-4189}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000483411900006}},
}

@article{ ISI:000471750900057,
Author = {Laplanche, G. and Gadaud, P. and Perriere, L. and Guillot, I and
   Couzinie, J. P.},
Title = {{Temperature dependence of elastic moduli in a refractory HfNbTaTiZr
   high-entropy alloy}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{799}},
Pages = {{538-545}},
Month = {{AUG 30}},
Abstract = {{The equiatomic HfNbTaTiZr solid solution is currently regarded as a
   model disordered body-centered cubic high-entropy alloy. Therefore, the
   temperature dependence of its elastic moduli is of prime importance to
   improve our understanding of the mechanical properties of this
   refractory alloy. In this study, the alloy was found to be single phase,
   fully recrystallized with a slight texture along the normal direction
   after thermomechanical processing at room temperature. Elastic moduli
   were determined over the temperature range {[}293 K-1100 K]. (C) 2019
   The Authors. Published by Elsevier B.V.}},
DOI = {{10.1016/j.jallcom.2019.05.322}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
ResearcherID-Numbers = {{COUZINIE, Jean-Philippe/I-8888-2017
   }},
ORCID-Numbers = {{COUZINIE, Jean-Philippe/0000-0001-7786-397X
   Laplanche, Guillaume/0000-0001-9559-0928}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000471750900057}},
}

@article{ ISI:000482304800001,
Author = {Choi, In-Chul and Jang, Jae-il},
Title = {{A Survey of Nanoindentation Studies on HPT-Processed Materials}},
Journal = {{ADVANCED ENGINEERING MATERIALS}},
Abstract = {{The development of high-pressure torsion (HPT) processing has increased
   the possibility for achieving significant grain refinement, which leads
   to a material's ability to produce ultrafine-grained or nanocrystalline
   materials having enhanced strength without a large expense of ductility
   at room temperature. Since the applied strain is locally changed across
   the sample disc during HPT, the microstructure and thus mechanical
   properties vary within the disc. Recently, as a promising tool for
   characterizing the mechanical behavior of the local regions within the
   disc, the nanoindentation technique becomes widely used mainly due to
   its simple and easy testing procedures and the requirement of only small
   volume of material. The nanoindentation technique provides important
   clues to better understand the relation between microstructural
   refinement and mechanical property enhancement of the HPT-processed
   materials. Here, the nanoindentation studies performed on various
   HPT-processed materials are reviewed with focus on a variety of
   micromechanical properties that can be estimated by nanoindentation and
   the interesting results are reported in the available literature.}},
DOI = {{10.1002/adem.201900648}},
Early Access Date = {{AUG}},
Early Access Year = {{2019}},
Article-Number = {{1900648}},
ISSN = {{1438-1656}},
EISSN = {{1527-2648}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000482304800001}},
}

@article{ ISI:000483456900034,
Author = {Shun, Tao-Tsung and Chang, Chieh-Hsiang},
Title = {{The effects of substitution of Co with Ni on microstructure, mechanical
   properties, and age hardening of Co1-xCrFeNi1+xTi0.3 high-entropy alloys}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{763}},
Month = {{AUG 19}},
Abstract = {{In this study, we investigated the effects of substitution of Co with Ni
   on the microstructure, mechanical properties, and age hardening of three
   Co1-xCoFeNi1+xTi0.3 high-entropy alloys (x values describe molar ratios;
   where x = 0, 0.5, 1, denoted as X-0, X-0.5, and X-1, respectively). All
   alloys after hot rolling at 1200 degrees C showed a simple face-centered
   cubic phase with an average grain size of 90 mu m. As the value of x
   increased, the hardness, yield stress, and ultimate tensile strength of
   the alloys also increased from HV263, 540 MPa, and 772 MPa to HV335, 672
   MPa, and 982 MPa, respectively. However, the elongation decreased from
   60\% to 37\% because of the more negative mixing enthalpy (Delta H-mix)
   of Ni with other constitutional elements, resulting in a simultaneous
   increase in the strength and brittleness of the grains. The aged alloys
   X-0 and X-0.5 to X-1 showed optimal age hardening at 700 degrees C and
   600 degrees C, respectively, which were associated with the
   precipitation of profuse sigma + eta phases. For the three alloys, the
   sigma and eta phases completely dissolved into the matrix at 1000
   degrees C and 1100 degrees C, respectively. After age treatment of the
   alloys at 1200 degrees C, the average grain diameter of the X-0 to X-1
   alloys increased from 216 mu m to 324 mu m, indicating that alloys with
   larger mixing entropy suppressed grain growth at high temperatures
   because of the sluggish diffusion effect. Application of the Hall-Petch
   equation (H = H-0 + k(H) d(-1/2)) revealed that with increases in x
   value, H-0 and k(H) increased from HV36 and 2236 to HV62 and 2586,
   respectively. The more negative Delta H-mix of Ni with other
   constitutional elements also explains this phenomenon.}},
DOI = {{10.1016/j.msea.2019.138181}},
Article-Number = {{138181}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000483456900034}},
}

@article{ ISI:000483456900010,
Author = {Smeltzer, Joshua A. and Marvel, Christopher J. and Hornbuckle, B. Chad
   and Roberts, Anthony J. and Marsico, Joseph M. and Giri, Anit K. and
   Darling, Kristopher A. and Rickman, Jeffrey M. and Chan, Helen M. and
   Harmer, Martin P.},
Title = {{Achieving ultra hard refractory multi-principal element alloys via
   mechanical alloying}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{763}},
Month = {{AUG 19}},
Abstract = {{Mechanical alloying was employed to produce a nanostructured
   Mo25Nb25Ta25W25 multi-principal element alloy (MPEA) with enhanced
   mechanical properties. Overall, a 400\% increase in hardness was
   achieved, as compared to similar cast alloys, via mechanical alloying
   and optimized long-term annealing treatments. Furthermore, advanced
   characterization, including aberration-corrected scanning transmission
   electron microscopy, was conducted to elucidate
   processing-structure-property relationships in which it was determined
   that, although the introduction of impurities via mechanical alloying is
   common and thought to be deleterious, impurities can lead to an
   impressive enhancement of mechanical properties. More specifically, in
   this study, Fe and N impurities resulted in the formation of nanoscale,
   ceramic secondary phases. The observed strengthening was attributed, at
   least in part, to the ceramic impurity phases. Overall, we suggest that
   a deliberate doping strategy may be employed in the future to tailor
   MPEA chemistry and thereby achieve superior mechanical properties.}},
DOI = {{10.1016/j.msea.2019.138140}},
Article-Number = {{138140}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000483456900010}},
}

@article{ ISI:000479023600007,
Author = {Coury, Francisco Gil and Kaufman, Michael and Clarke, Amy J.},
Title = {{Solid-solution strengthening in refractory high entropy alloys}},
Journal = {{ACTA MATERIALIA}},
Year = {{2019}},
Volume = {{175}},
Pages = {{66-81}},
Month = {{AUG 15}},
Abstract = {{Compression stress-strain curves of a number of refractory high entropy
   alloys (RHEAS) were generated at temperatures ranging from room
   temperature to 1000 degrees C. It is shown that solid-solution
   strengthening in these alloys has both an athermal and a thermal
   component. Results from mechanical testing are combined with literature
   data to develop solid-solution strengthening models for both components
   that incorporate the particularities of single-phase body centered cubic
   (BCC) materials. The athermal component is affected by a combination of
   atomic size mismatch and elastic modulus mismatch, which depend upon
   average values from each alloy, thereby allowing this component to be
   estimated in a high throughput fashion. On the other hand, the
   thermally-activated yield stress component does not correlate with any
   parameter that can be calculated by averaging pure elemental atomic
   properties and it is observed to be larger than the values found for
   pure BCC refractory metals and their dilute alloys. Overall, RHEAS are
   found to have larger thermal and athermal yield stress components
   compared to pure or conventional refractory alloys, which explains their
   relatively high strengths at room temperature. (C) 2019 Acta Materialia
   Inc. Published by Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.actamat.2019.06.006}},
ISSN = {{1359-6454}},
EISSN = {{1873-2453}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000479023600007}},
}

@article{ ISI:000478802800004,
Author = {George, Easo P. and Raabe, Dierk and Ritchie, Robert O.},
Title = {{High-entropy alloys}},
Journal = {{NATURE REVIEWS MATERIALS}},
Year = {{2019}},
Volume = {{4}},
Number = {{8}},
Pages = {{515-534}},
Month = {{AUG}},
Abstract = {{Alloying has long been used to confer desirable properties to materials.
   Typically, it involves the addition of relatively small amounts of
   secondary elements to a primary element. For the past decade and a half,
   however, a new alloying strategy that involves the combination of
   multiple principal elements in high concentrations to create new
   materials called high-entropy alloys has been in vogue. The
   multi-dimensional compositional space that can be tackled with this
   approach is practically limitless, and only tiny regions have been
   investigated so far. Nevertheless, a few high-entropy alloys have
   already been shown to possess exceptional properties, exceeding those of
   conventional alloys, and other outstanding high-entropy alloys are
   likely to be discovered in the future. Here, we review recent progress
   in understanding the salient features of high-entropy alloys. Model
   alloys whose behaviour has been carefully investigated are highlighted
   and their fundamental properties and underlying elementary mechanisms
   discussed. We also address the vast compositional space that remains to
   be explored and outline fruitful ways to identify regions within this
   space where high-entropy alloys with potentially interesting properties
   may be lurking.}},
DOI = {{10.1038/s41578-019-0121-4}},
ISSN = {{2058-8437}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000478802800004}},
}

@article{ ISI:000473228900001,
Author = {Qiao, Dong-Xu and Jiang, Hui and Jiao, Wen-Na and Lu, Yi-Ping and Cao,
   Zhi-Qiang and Li, Ting-Ju},
Title = {{A Novel Series of Refractory High-Entropy Alloys Ti2ZrHf0.5VNbx with
   High Specific Yield Strength and Good Ductility}},
Journal = {{ACTA METALLURGICA SINICA-ENGLISH LETTERS}},
Year = {{2019}},
Volume = {{32}},
Number = {{8}},
Pages = {{925-931}},
Month = {{AUG}},
Abstract = {{A series of Ti2ZrHf0.5VNbx (x=0, 0.25, 0.5, 0.75 and 1.0) refractory
   high-entropy alloys were prepared to investigate the alloying effect of
   Nb on the microstructures and mechanical properties. All the alloys
   displayed a simple BCC structure. The microstructures of the alloys
   changed from the initial single-phase columnar structure (x=0) to
   dendrite microstructure (x>0). At room temperature, all the alloys
   exhibited high ductility (with the compressive strains of more than
   50\%). With the increase in Nb content, the yield strength slightly
   decreased from 1160 to 980MPa and the hardness dropped from 338 to
   310HV. Moreover, the alloys exhibited low density from 6.47 to
   6.84g/cm(3) and high specific yield strength (SYS) from 143 to
   179kPam(3)/kg. The comprehensive performance of ductility and SYS was
   superior to most of the reported high-entropy alloys. The yield strength
   of the alloys increased from 405 to 859MPa and from 85 to 195MPa with
   the addition of Nb element at 873K and 1073K, respectively.}},
DOI = {{10.1007/s40195-019-00921-3}},
ISSN = {{1006-7191}},
EISSN = {{2194-1289}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000473228900001}},
}

@article{ ISI:000477686500026,
Author = {Shabani, Ali and Toroghinejad, Mohammad Reza},
Title = {{Investigation of microstructure, texture, and mechanical properties of
   FeCrCuMnNi multiphase high entropy alloy during recrystallization}},
Journal = {{MATERIALS CHARACTERIZATION}},
Year = {{2019}},
Volume = {{154}},
Pages = {{253-263}},
Month = {{AUG}},
Abstract = {{FeCrCuMnNi multiphase high entropy alloy was cold-rolled to 85\%
   reduction and annealed at different temperatures. Recrystallization
   behavior of the alloy was investigated using XRD, SEM-EBSD, hardness,
   microhardness, and tensile tests. The results revealed variation in
   phase distribution due to annealing and earlier recrystallization of the
   FCC1 phase. Recrystallization of FCC1 and FCC2 phases initiated at 873
   and 1073 K, respectively, and a fully recrystallized microstructure was
   seen after 1273 K. Deformation texture components eliminated slowly with
   increase in annealing temperature, and D and Cube components formed as a
   result of recrystallization. Faster decrease in FCC1 microhardness was
   seen due to earlier recrystallization. In addition, an excellent
   combination of strength and elongation was achieved in the partially
   recrystallized samples compared to conventional alloys. The strength was
   affected more after annealing at temperatures higher than 1073 K.
   Fracture behavior of FCC2 phase changed from a brittle fracture to a
   ductile fracture with increase in annealing temperature; however, FCC1
   phase revealed a ductile fracture even at low annealing temperatures.}},
DOI = {{10.1016/j.matchar.2019.05.043}},
ISSN = {{1044-5803}},
EISSN = {{1873-4189}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000477686500026}},
}

@article{ ISI:000466352900030,
Author = {Sunkari, U. and Reddy, S. R. and Chatterjee, S. and Bhattacharjee, P. P.},
Title = {{Effect of prolonged aging on phase evolution and mechanical properties
   of intermetallic strengthened CoCrFeNi2.1Nbx high entropy alloys}},
Journal = {{MATERIALS LETTERS}},
Year = {{2019}},
Volume = {{248}},
Pages = {{119-122}},
Month = {{AUG 1}},
Abstract = {{Microstructure and tensile behavior of CoCrFeNi2.1Nbx (x = 0.2, 0.4)
   high entropy alloys were investigated in the as-cast and aged (800
   degrees C/24 h) conditions. Increasing Nb addition increased strength
   but reduced ductility due to the increased volume fraction of Laves
   phase. On aging, fine acicular precipitates formed throughout the matrix
   in the CoCrFeNi2.1Nb0.4 alloy, but only at the dendrite boundaries in
   the CoCrFeNi2.1Nb0.2 alloy. While both the aged alloys showed increase
   in strength due to the presence of the fine precipitates, the favorable
   microstructure of the CoCrFeNi2.1Nb0.2 ensured a larger mean free path
   for gliding dislocations, thus rendering superior strength-ductility
   synergy. (C) 2019 Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.matlet.2019.04.012}},
ISSN = {{0167-577X}},
EISSN = {{1873-4979}},
ORCID-Numbers = {{Bhattacharjee, Pinaki/0000-0002-6422-2601
   Seelam, Rajasekhar Reddy/0000-0001-8656-9270
   Sunkari, Upender/0000-0002-0088-2168}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000466352900030}},
}

@article{ ISI:000473228900002,
Author = {Wang, Yi-Tao and Li, Jian-Bo and Xin, Yun-Chang and Chen, Xian-Hua and
   Rashad, Muhammad and Liu, Bin and Liu, Yong},
Title = {{Hot Deformation Behavior and Hardness of a CoCrFeMnNi High-Entropy Alloy
   with High Content of Carbon}},
Journal = {{ACTA METALLURGICA SINICA-ENGLISH LETTERS}},
Year = {{2019}},
Volume = {{32}},
Number = {{8}},
Pages = {{932-943}},
Month = {{AUG}},
Abstract = {{A CoCrFeMnNi high-entropy alloy with a high content of carbon was
   synthesized, and its hot deformation behavior was studied at the
   temperatures 800-1000 degrees C at the strain rates ranging from 0.001
   to 0.1s(-1). As-prepared alloy is a face-centered cubic-structured solid
   solution, with a large amount of carbides residing at grain boundaries.
   True stress-strain curves were employed to develop the constitutive
   equation of apparent activation energy. The apparent activation energy
   (Q) was found to be 423kJmol(-1), indicating a dynamic flow softening
   behavior. The size of dynamic recrystallized (DRXed) grains increases
   with increasing the temperature or decreasing the strain rate. A
   processing map was sketched on the basis of the flow stress. The
   temperature range of 900-1000 degrees C and 10(-3)-10(-2.6) s(-1) strain
   rate were found to be the optimum hot-forging parameter. With increasing
   temperature or decreasing strain rate, the volume fraction of fine
   carbides (1m) increases. A lot of coarse carbides can be found in the
   matrix after deformation at 800 degrees C, which leads to a high
   hardness value of 345 HV. The carbides after deformation at 1000 degrees
   C are mainly nano-sized M7C3 and M23C6, which can promote the nucleation
   of DRX.}},
DOI = {{10.1007/s40195-019-00916-0}},
ISSN = {{1006-7191}},
EISSN = {{2194-1289}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000473228900002}},
}

@article{ ISI:000477686500017,
Author = {Xie, Siyao and Li, Ruidi and Yuan, Tiechui and Zhou, Libo and Zhang, Mei
   and Wang, Minbo and Niu, Pengda and Cao, Peng and Chen, Chao},
Title = {{Effect of heating rate on microstructure and mechanical properties of
   AlCoCrFeNi high entropy alloy produced by spark plasma sintering}},
Journal = {{MATERIALS CHARACTERIZATION}},
Year = {{2019}},
Volume = {{154}},
Pages = {{169-180}},
Month = {{AUG}},
Abstract = {{Spark plasma sintering (SPS), as a novel powder consolidation method,
   has great potential in the production of high entropy alloys (HEAs). The
   heating rate is an important parameter in SPS, and understanding its
   effect is a critical issue for the purpose to optimize microstructure
   and promote mechanical properties of HEAs. The AlCoCrFeNi was adopted as
   a representative HEA in this study. The phase compositions,
   microstructural textures, and mechanical properties were investigated in
   this study in detail. It was found that the FCC phase formed at BCC
   grain boundaries while the alpha phase precipitated at the interface of
   B2/BCC no matter of the heating rate. The texture varied at different
   heating rates as the texture \{110\} < 755 > in B2/BCC was characterized
   at the heating rate of 150 degrees C/min while the complex texture
   \{051\} < 715 > in FCC was observed at the heating rate of 200 degrees
   C/min. The Vickers hardness and wear resistance decreased with
   increasing of the heating rate. Furthermore, the compressive strength
   and corresponding plastic strain reached their highest 2752.0 +/- 48 MPa
   and 26.5 +/- 1.3\% at the heating rate of 150 degrees C/min.}},
DOI = {{10.1016/j.matchar.2019.05.022}},
ISSN = {{1044-5803}},
EISSN = {{1873-4189}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000477686500017}},
}

@article{ ISI:000477633700010,
Author = {Yan, Jianhui and Li, Kailing and Wang, Yi and Qiu, Jingwen},
Title = {{Microstructure and Mechanical Properties of WMoNbCrTi HEAs Sintered from
   the Powders Milled for Different Durations}},
Journal = {{JOM}},
Year = {{2019}},
Volume = {{71}},
Number = {{8}},
Pages = {{2489-2497}},
Month = {{AUG}},
Abstract = {{Refractory high-entropy alloys (HEAs) are reported to have better
   properties than conventional alloys. In this work, a new refractory
   WMoNbCrTi HEA was spark plasma sintered with ball milling powder. The
   results show that the microstructure and mechanical properties of the
   bulk alloys are strongly dependent on the milling duration of the
   powders. The structure of the powders milled for 5-40 h is mainly
   composed of three BCC solid solution phases (W-rich, Nb-rich and
   Cr-rich). After being consolidated by SPS, the structure of the bulk
   alloys consists of a W-rich solid solution matrix with a small amount of
   Ti-rich solid solution and Laves phase. The WMoNbCrTi HEA prepared from
   30 h milling powder shows the highest hardness value of 10.40 GPa.
   However, the alloy prepared from the 5 h milling powder exhibits the
   maximum fracture toughness (7.16 MPa m(1/2)), compressive fracture
   strength (2765 MPa) and fracture strain (9.8\%), respectively. The
   reasons for the influence of the milling duration on the mechanical
   properties of the WMoNbCrTi HEAs are discussed in detail. The
   combination of mechanical alloying and the subsequent sintering is a
   promising way to fabricate HEAs with controllable mechanical properties.}},
DOI = {{10.1007/s11837-019-03432-9}},
ISSN = {{1047-4838}},
EISSN = {{1543-1851}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000477633700010}},
}

@article{ ISI:000470816400007,
Author = {Zhou, P. F. and Xiao, D. H. and Wu, Z. and Song, M.},
Title = {{Microstructure and mechanical properties of AlCoCrFeNi high entropy
   alloys produced by spark plasma sintering}},
Journal = {{MATERIALS RESEARCH EXPRESS}},
Year = {{2019}},
Volume = {{6}},
Number = {{8}},
Month = {{AUG}},
Abstract = {{AlCoCrFeNi is among one of the most-widely studied alloy systems in the
   high entropy alloy (HEA) area. It exhibits interesting microstructure
   and unique mechanical properties. In this study, we assessed the
   feasibility of producing the AlCoCrFeNi alloy using powder metallurgy
   technique in which the pre-alloy powders were obtained through gas
   atomization and sintering was achieved by spark plasma sintering (SPS).
   Extensive microstructure and mechanical property characterizations were
   conducted to assist our understanding of the effects of processing
   conditions (i.e., sintering temperature) on the microstructure and
   mechanical properties of obtained materials. Current results indicate
   that powder metallurgy (in this study, gas atomization + SPS) could be
   used as an alternative for HEA fabrication. The pre-alloy powders
   exhibit microstructure (BCC + B2) similar to reported as-cast
   microstructure. Sintered parts with good combination of strength and
   compression limit (similar to 2368 MPa, 22.1\%) can be achieved by an
   appropriate selection of sintering temperature (for example, 1100
   degrees C). Similar to previous observations, temperature exerts an
   important role on microstructural evolution. Fully consolidated part
   cannot be obtained when the sintering temperature was lower than 900
   degrees C. Sintering at 1100 degrees C the higher yielded parts with
   near-fully density can be obtained. With the increasing of sintering
   temperature, FCC phase depletion with Al and Ni tends to form. The
   network BCC phase within the B2 phase grows and gathers to the boundary
   of the B2 phase with the sintering temperature above 1200 degrees C.
   Further studies will be conducted to have a full picture of this
   microstructure behavior.}},
DOI = {{10.1088/2053-1591/ab2517}},
Article-Number = {{0865e7}},
ISSN = {{2053-1591}},
ResearcherID-Numbers = {{Song, Min/C-3730-2013}},
ORCID-Numbers = {{Song, Min/0000-0002-3197-4647}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000470816400007}},
}

@article{ ISI:000468903200006,
Author = {Ma, Xiaoguang and Chen, Jian and Wang, Xianhui and Xu, Yanjin and Xue,
   Yujie},
Title = {{Microstructure and mechanical properties of cold drawing CoCrFeMnNi high
   entropy alloy}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{795}},
Pages = {{45-53}},
Month = {{JUL 30}},
Abstract = {{The present study investigated the effects of cold drawing deformation
   on the microstructure and mechanical properties of CoCrFeMnNi high
   entropy alloy. The results showed that at low strain (<= 0.28), the
   plastic deformation is dominated by planar slip with the formation of
   slip bands, Lomer-Cottrell locks and Taylor lattices. While at medium to
   high strain (between 0.28 and 1.96), the microstructure consisted of
   dislocation cells, deformation twins (including the primary and
   secondary twins) and irregular dislocation (i.e. randomly distributed
   dislocation clusters). At high strains ( > 1.96), deformation is mainly
   mediated by twinning and shear banding causing the formation of lamellae
   structures parallel to metal flow direction. Texture evolution showed
   that the <111> fiber texture was the stable texture component and the
   <100> fiber texture became unstable at low strain. At strains higher
   than 1.96, the texture component content remained unchanged even under
   further increased strain, and the volume fractions of <111>, <100> and
   complex texture components were 57.4\%, 30.7\% and 11.9\%, respectively.
   Additionally, the microhardness and yield strength increased
   monotonically with increased strain. At the early stages of deformation,
   activation of planar slip causes the initial HEA to display a very high
   strain hardening rate. The hardness value saturated at 430 HV at the
   strain of 2.77, which is about 3 times larger than the initial hardness
   value. Pre-strain by cold drawing deformation can significantly enhance
   the yield strength of the CoCrFeMnNi high entropy alloy by twinning and
   texture strengthening. (C) 2019 Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2019.04.296}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000468903200006}},
}

@article{ ISI:000477784900014,
Author = {Tang, K. and Chen, L. B. and Wang, S. and Wei, R. and Yang, Z. Y. and
   Jiang, F. and Sun, J.},
Title = {{Development of a large size FCC high-entropy alloy with excellent
   mechanical properties}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{761}},
Month = {{JUL 22}},
Abstract = {{A large size 10 kg Fe40Mn40Co10Cr10 high-entropy alloy (HEA) with 3.3
   at. \% C-doped was prepared by electromagnetic levitation melting. The
   hot deformation behavior of the as-cast ingot was investigated to guide
   the hot forging process. Annealing was further conducted on the
   as-forged samples to obtain more optimized mechanical properties. The
   as-forged HEA had yield strength (YS) of 792 MPa, ultimate tensile
   strength of 1055 MPa and a satisfactory fracture elongation (EL) of
   22.6\%. The YS of the HEA annealed at 1050 degrees C increased from 393
   MPa to 512 MPa and EL from 26.5\% to 55.3\% in comparison with the
   as-cast HEA. It is suggested that the enhanced yield strength of the as
   annealed HEA was attributed to carbon interstitial solid solution
   strengthening, grain refining and precipitation of tiny carbides, and
   the improvement of ductility was due to the elimination of cast defects
   and twinning-induced plasticity. This work paved the way for the
   application of HEA as high performance structure materials.}},
DOI = {{10.1016/j.msea.2019.138039}},
Article-Number = {{138039}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000477784900014}},
}

@article{ ISI:000474501200036,
Author = {Li, Jia and Chen, Haotian and Li, Sixu and Fang, Qihong and Liu, Yong
   and Liang, Luxing and Wu, Hong and Liaw, Peter K.},
Title = {{Tuning the mechanical behavior of high-entropy alloys via controlling
   cooling rates}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{760}},
Pages = {{359-365}},
Month = {{JUL 8}},
Abstract = {{The microstructures determine the macro-mechanical properties in metals
   and alloys. However, the formation mechanism of microstructures in
   high-entropy alloys (HEAs) rapidly cooled to room temperature still
   remains unknown at nanoscale. Here, we present the AlCoCrCuFeNi HEM
   prepared by various cooling rates and the deformation behaviour using
   molecular dynamic simulation. The results show that the radial
   distribution function of HEM is in good agreement with the previous
   experimental result. The amorphous HEA is formed at high cooling rates,
   while the nanocrystalline HEA is generated at low cooling rates. The
   hybrid amorphous crystallization structured HEA occurs at middle cooling
   rates. For low cooling rates, the considerable amount of
   face-centered-cubic and hexagonal-close-packed short-range orders
   clearly show the crystal-nucleation process in the supercooled liquid of
   HEAs. The high residual hydrostatic stress around grain boundaries is
   observed in the nanocrystaline HEAs. Moreover, the nanocrystal HEA
   presents a high strength, compared to the amorphous HEA. The amorphous
   HEA exhibits the stable flow stress due to no obvious local stress
   concentration. This result could help guide the preparation of HEM with
   a high strength by controlling the cooling rate, which generates the
   structural hierarchy.}},
DOI = {{10.1016/j.msea.2019.06.017}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000474501200036}},
}

@article{ ISI:000467235800117,
Author = {Gao, N. and Lu, D. H. and Zhao, Y. Y. and Liu, X. W. and Liu, G. H. and
   Wu, Y. and Liu, G. and Fan, Z. T. and Lu, Z. P. and George, E. P.},
Title = {{Strengthening of a CrMnFeCoNi high-entropy alloy by carbide
   precipitation}},
Journal = {{JOURNAL OF ALLOYS AND COMPOUNDS}},
Year = {{2019}},
Volume = {{792}},
Pages = {{1028-1035}},
Month = {{JUL 5}},
Abstract = {{The equiatomic CrMnFeCoNi high-entropy alloy (HEA) exhibits outstanding
   toughness and excellent strength-ductility combination at cryogenic
   temperatures. However, its strength is relatively low at room
   temperature. In order to strengthen this HEA, microalloying additions of
   0.8 at.\% Nb and C were made and its properties and microstructure
   evaluated. It was found that the microalloying resulted in the formation
   of carbide precipitates and a reduction of the grain size to similar to
   2.6 mu m. As a result, the room-temperature tensile yield strength (732
   MPa) of the microalloyed HEA is roughly double that of the base HEA
   (with a concomitant increase in the ultimate strength) while its
   ductility is maintained at a relatively high level (elongation to
   fracture of similar to 32\%). The strengthening is due to precipitation
   hardening from the nanoscale carbide particles and grain refinement.
   Crown Copyright (C) 2019 Published by Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.jallcom.2019.04.121}},
ISSN = {{0925-8388}},
EISSN = {{1873-4669}},
ResearcherID-Numbers = {{Lu, Zhao-Ping/A-2718-2009
   }},
ORCID-Numbers = {{Lu, Zhao-Ping/0000-0003-1463-8948
   Liu, Gang/0000-0002-9135-6322
   Liu, Xinwang/0000-0001-5762-279X}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000467235800117}},
}

@article{ ISI:000462761700048,
Author = {Cao, Yuankui and Liu, Yong and Li, Yunping and Liu, Bin and Wang, Jiawen
   and Du, Meng and Liu, Ruiping},
Title = {{Precipitation strengthening in a hot-worked TiNbTa0.5ZrAl0.5 refractory
   high entropy alloy}},
Journal = {{MATERIALS LETTERS}},
Year = {{2019}},
Volume = {{246}},
Pages = {{186-189}},
Month = {{JUL 1}},
Abstract = {{A TiNbTa0.5ZrAl0.5 refractory high entropy alloy was prepared by powder
   metallurgy and subsequently subjected to hot forging and annealing.
   Precipitation behavior and mechanical properties of the hot-worked
   TiNbTa0.5ZrAl0.5 alloy were investigated. Results show that the hot
   forging leads to a formation of (Zr, Al)-rich HCP precipitates in the
   initial BCC matrix. The precipitates have significant strengthening
   effect on the TiNbTa0.5ZrAl0.5 alloy after annealing at 1000 degrees C
   for 2 h. Owing to the precipitation strengthening, the hot-worked
   TiNbTa0.5ZrAl0.5 alloy exhibits a high compressive yield strength of
   1740 MPa with a compressive stain of 20\%. It is interesting that
   annealing at lower or higher temperatures than 1000 degrees C causes a
   degradation in compression properties, mainly due to the decomposition
   of the BCC matrix and the coarsening of the HCP precipitates. (C) 2019
   Elsevier B.V. All rights reserved.}},
DOI = {{10.1016/j.matlet.2019.03.075}},
ISSN = {{0167-577X}},
EISSN = {{1873-4979}},
ResearcherID-Numbers = {{Li, Yunping/M-2076-2016}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000462761700048}},
}

@article{ ISI:000464908700060,
Author = {Guo, Zhiming and Zhang, Aijun and Han, Jiesheng and Meng, Junhu},
Title = {{Effect of Si additions on microstructure and mechanical properties of
   refractory NbTaWMo high-entropy alloys (vol 54, pg 5844, 2019)}},
Journal = {{JOURNAL OF MATERIALS SCIENCE}},
Year = {{2019}},
Volume = {{54}},
Number = {{13}},
Pages = {{10077}},
Month = {{JUL}},
Abstract = {{In the original article, author name Junhu Meng was misspelled.}},
DOI = {{10.1007/s10853-019-03567-9}},
ISSN = {{0022-2461}},
EISSN = {{1573-4803}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000464908700060}},
}

@article{ ISI:000469795200023,
Author = {Li, Ziyong and Fu, Liming and Zheng, Han and Yu, Rui and Lv, Lifeng and
   Sun, Yanle and Dong, Xianping and Shan, Aidang},
Title = {{Effect of Annealing Temperature on Microstructure and Mechanical
   Properties of a Severe Cold-Rolled FeCoCrNiMn High-Entropy Alloy}},
Journal = {{METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
   MATERIALS SCIENCE}},
Year = {{2019}},
Volume = {{50A}},
Number = {{7}},
Pages = {{3223-3237}},
Month = {{JUL}},
Abstract = {{An ultrafine-structured FeCoCrNiMn high-entropy alloy (HEA) was produced
   by severe cold rolling (SCR) with a 95 pct reduction, and the effect of
   annealing temperature over a wide range from 573 K to 1373 K (300
   degrees C to 1100 degrees C) on the microstructure and mechanical
   properties of this SCRed HEA was systematically investigated. The
   results show that the microstructure of the single-phase FCC HEA after
   SCR is greatly refined and mainly comprises ultrafine crystalline,
   high-density dislocation cell and networks, which substantially improve
   the hardness and strength. The SCRed HEA starts to recrystallize at an
   annealing temperature of 773 K (500 degrees C) and is fully
   recrystallized at 973 K (700 degrees C) after 1 hours. The sigma phases
   with a tetragonal structure form upon annealing at 773 K (500 degrees
   C), leading to a further enhancement in hardness and strength for the
   annealed HEA compared to the SCRed HEA. The average grain size remains
   below 500 nm when the SCRed HEA is annealed at 923 K (650 degrees C) for
   1 hours, indicating that the ultrafine-structured HEA after SCR and
   subsequent annealing treatment possesses excellent microstructural
   thermal stability. The SCRed HEAs annealed at 923 K and 973 K (650
   degrees C and 700 degrees C) exhibit excellent high strength-ductility
   combinations due to the formation of the fully recrystallized
   ultrafine-grained microstructure. The strain-rate sensitivity parameter
   (m value) with different grain sizes, from ultrafine to coarse, was
   evaluated by strain-rate jump tests. The m value of the HEA increases
   monotonically with increasing grain size and annealing temperature.
   Moreover, high-temperature tensile tests demonstrated that the annealed
   HEAs exhibit superplastic deformation behavior at 973 K and 1073 K (700
   degrees C and 800 degrees C), and the formation of a Cr-rich phase is
   found during high-temperature deformation. It is believed that the
   plastic deformation facilitates the phase decomposition of fine-grained
   HEAs and grain boundary sliding is the key mechanism of high-temperature
   deformation.}},
DOI = {{10.1007/s11661-019-05231-y}},
ISSN = {{1073-5623}},
EISSN = {{1543-1940}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000469795200023}},
}

@article{ ISI:000470047600042,
Author = {Liu, Xiaoqiang and Cheng, Hu and Li, Zhanjiang and Wang, Hao and Chang,
   Fa and Wang, Weiguo and Tang, Qunhua and Dai, Pinqiang},
Title = {{Microstructure and mechanical properties of FeCoCrNiMnTi0.1C0.1
   high-entropy alloy produced by mechanical alloying and vacuum hot
   pressing sintering}},
Journal = {{VACUUM}},
Year = {{2019}},
Volume = {{165}},
Pages = {{297-304}},
Month = {{JUL}},
Abstract = {{FeCoCrNiMnTi0.1Ca0.1 (TiC10 alloy) high-entropy alloy (HEA) was
   successfully prepared by mechanical alloying (MA) and vacuum
   hot-pressing sintering (VHPS) at different temperatures (850, 900, 950
   and 1000 degrees C). During the MA process, the constituent elements
   were gradually alloyed and formed FCC solid solutions. The
   microstructure of bulk TiC10 alloy is mainly composed of FCC phase as
   the matrix phase and a small quantity of M23C6, M7C3 and TiMnO3 phases.
   The TiC10 alloy has relatively good comprehensive mechanical properties
   when sintered at 900 degrees C. The yield strength and hardness of the
   alloy reached 1652 MPa and 461 HV, respectively. In this study, a close
   relationship between microstructure and mechanical properties was
   discussed. Grain boundary strengthening is the dominant strengthening
   mechanism.}},
DOI = {{10.1016/j.vacuum.2019.04.043}},
ISSN = {{0042-207X}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000470047600042}},
}

@article{ ISI:000473163200011,
Author = {Rogal, Lukasz and Szklarz, Zbigniew and Bobrowski, Piotr and Kalita,
   Damian and Garzel, Grzegorz and Tarasek, Anna and Kot, Marcin and
   Szlezynger, Maciej},
Title = {{Microstructure and Mechanical Properties of Al-Co-Cr-Fe-Ni Base High
   Entropy Alloys Obtained Using Powder Metallurgy}},
Journal = {{METALS AND MATERIALS INTERNATIONAL}},
Year = {{2019}},
Volume = {{25}},
Number = {{4}},
Pages = {{930-945}},
Month = {{JUL}},
Abstract = {{Four different compositions of high entropy alloys based on Al-Co-Cr-Fe
   and Al-Co-Cr-Fe-Ni systems were prepared using mechanical alloying and
   consolidation by spark plasma sintering. The chemical compositions of
   the studied alloys were experimentally selected to obtain a BCC solid
   solution and mixtures of BCC with FCC. The microstructure of the
   Al25Co25Cr25Fe25 (all in at\%) high entropy alloy consisted of a matrix
   with a high concentration of Al, Co and Fe, in which spherical grains
   (50-200 nm) enriched in Cr were embedded. Both the matrix and grains had
   body centered cubic structures. The addition of nickel to a four-element
   system led to the formation of a multiphase composition. The
   microstructure of the Al20Co20Cr20Fe20Ni20, Al10Co30Cr20Fe35Ni5 and
   Al15Co30Cr15Fe40Ni5 HEAs consisted of fine grains measuring 50-500 nm
   composed of: AlNi-B2, BCC phase, FCC or BCC solid solutions and
   sigma-sigma phase, respectively. The complex structure of the studied
   samples resulted in changeable mechanical properties. The highest
   compression strength of 3920 MPa was accompanied by an increased yield
   strength of 3500 MPa, and a low strain of 0.7\%, for the
   Al25Co25Cr25Fe25 alloy. The addition of Ni led to the formation of
   plastic FCC phases responsible for a decrease in strength with increases
   in ductility, which, in the new non-equiatomic Al10Co30Cr20Fe35Ni5 high
   entropy alloy reached 6.3\% at a yield strength of 1890 MPa and
   compression strength of 2230 MPa. The conducted abrasion studies
   revealed that non-equilibrium high entropy alloys have the highest
   abrasion resistance.}},
DOI = {{10.1007/s12540-018-00236-5}},
ISSN = {{1598-9623}},
EISSN = {{2005-4149}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000473163200011}},
}

@article{ ISI:000475200500001,
Author = {Qin, Gang and Zhang, Yufeng and Chen, Ruirun and Zheng, Huiting and
   Wang, Liang and Su, Yanqing and Ding, Hongsheng and Guo, Jingjie and Fu,
   Hengzhi},
Title = {{Microstructures and mechanical properties of (AlCoCrFeMn)(100-x)Cu-x
   high-entropy alloys}},
Journal = {{MATERIALS SCIENCE AND TECHNOLOGY}},
Year = {{2019}},
Volume = {{35}},
Number = {{12}},
Pages = {{1457-1463}},
Month = {{AUG 13}},
Abstract = {{A series of (AlCoCrFeMn)(100 - )Cu-x(x) high-entropy alloys (0, 4, 8,
   12, 16 at.-\%) were prepared by vacuum arc furnace melting and their
   phase composition, microstructure and mechanical properties were
   systematically investigated. The results show that Cu can induce phase
   transformation from the orthorhombic phase to the Laves phase in
   (AlCoCrFeMn)(100 - )Cu-x(x) high-entropy alloys and the volume fractions
   of Laves phase increases from 0 to 70\% with increasing Cu content. The
   compression fracture strain increases from 5 to 16\% and the compression
   fracture strength also increases from 1380 to 2140 MPa with Cu content
   increases. The increased volume fraction of the Laves phase is the main
   factor for the ductility increases.}},
DOI = {{10.1080/02670836.2019.1629541}},
Early Access Date = {{JUN}},
Early Access Year = {{2019}},
ISSN = {{0267-0836}},
EISSN = {{1743-2847}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000475200500001}},
}

@article{ ISI:000472813900041,
Author = {Elkatatny, Sally and Gepreel, Mohamed A. H. and Hamada, Atef and
   Nakamura, Koichi and Yamanaka, Kenta and Chiba, Akihiko},
Title = {{Effect of Al content and cold rolling on the microstructure and
   mechanical properties of Al5Cr12Fe35Mn28Ni20 high-entropy alloy}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{759}},
Pages = {{380-390}},
Month = {{JUN 24}},
Abstract = {{In the present study, low-cost high-entropy Al(5,10)Cr12Fe35Mn
   Ni-(28,23)(20) alloys containing 5 and 10 at \% Al were designed based
   on the thermodynamic principles. The chemical compositions of the
   studied high entropy alloys (HEAs) were selected to obtain face centered
   cubic solid solutions with good cold deformability. The alloys were
   produced using arc melting and were subsequently subjected to cold
   rolling to reduce their thickness up to 90\%, to study their structure
   stability and strengthen them. Elemental mapping of the as-cast and
   deformed structures was conducted using electron microprobe analysis.
   Subsequently, the mechanical properties of the as cast and heavily
   deformed alloys were determined using micro hardness measurements and
   tensile and compression tests. The microstructure evolution was studied
   using X-ray diffraction and electron backscatter diffraction. It was
   observed that the thermodynamic parameters of HEAs could be used to
   enhance their mechanical properties, and the experimental results were
   in agreement with those observations. After substituting Mn with Al in
   Al5Cr12Fe35Mn28Ni20, the yield stress of Al10Cr12Fe35Mn23Ni20 increased
   by similar to 14\%. Moreover, the alloy maintained good cold workability
   and its tensile ductility exceeded 40\%. Cold rolling the alloy to 90\%
   increased its yield stress more than four times. Despite the heavy
   deformation caused by cold rolling (2.3 true strain), deformation
   twinning was induced in these alloys.}},
DOI = {{10.1016/j.msea.2019.05.056}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
ResearcherID-Numbers = {{Yamanaka, Kenta/G-4745-2014}},
ORCID-Numbers = {{Yamanaka, Kenta/0000-0003-1675-4731}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000472813900041}},
}

@article{ ISI:000472813900045,
Author = {Sonkusare, Reshma and Swain, Aditya and Rahul, M. R. and Samal, Sumanta
   and Gurao, N. P. and Biswas, Krishanu and Singh, Sudhanshu S. and Nayan,
   N.},
Title = {{Establishing processing-microstructure-property paradigm in complex
   concentrated equiatomic CoCuFeMnNi alloy}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{759}},
Pages = {{415-429}},
Month = {{JUN 24}},
Abstract = {{Hot deformation behavior of equiatomic FCC CoCuFeMnNi complex
   concentrated alloy has been investigated via isothermal compression
   tests on Gleeble-3800 thermo-mechanical simulator in the temperature (T)
   range of 1073-1273 K and strain rate (epsilon)over dot range of 1-10(-3)
   s(-1). This has been aided with detailed microstructural analysis using
   SEM, EBSD and TEM to decipher the deformation micro-mechanisms during
   hot compression tests. The processing maps have been constructed by
   superimposition of the instability map with efficiency map and the
   optimum thermo-mechanical processing conditions were found to be T =
   1173 K, (epsilon)over dot = 10(-3) s(-1) and T = 1273 K, (epsilon)over
   dot = 10(-2) s(-1). Microstructural investigation using SEM and EBSD
   reveal phase separation between Cu-rich and Cu-lean regions wherein
   Cu-rich FCC phase at the grain boundaries undergoes discontinuous
   dynamic recrystallization (DDRX) while the Cu-lean phase undergoes
   dynamic recovery (DRV). The average activation volume in the range of
   44-250 b(3) suggest that cross slip is the rate controlling mechanism
   during the deformation and activation energy of 394 kJ/mol, that is
   almost twice than that for diffusion in copper, indicate contribution
   from both mechanical and thermal component to the overall activation
   energy. It is evident that the diffusion assisted copper segregation
   aids in obtaining higher efficiency of deformation and easy
   processability due to a unique microstructure comprising of Cu-lean
   grains surrounded by soft Cu-rich grains near grain boundaries which
   undergo DDRX. Numerical simulations using finite element method are able
   to correctly predict hot deformation behavior, establishing the
   processing-microstructure-property paradigm in CoCuFeMnNi complex
   concentrated alloy.}},
DOI = {{10.1016/j.msea.2019.04.096}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000472813900045}},
}

@article{ ISI:000472813900061,
Author = {Wu, Wenqian and Guo, Lin and Guo, Baisong and Liu, Yong and Song, Min},
Title = {{Altered microstructural evolution and mechanical properties of
   CoCrFeNiMo0.15 high-entropy alloy by cryogenic rolling}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{759}},
Pages = {{574-582}},
Month = {{JUN 24}},
Abstract = {{In this paper, the microstructural characteristics and deformation
   behaviors of a CoCrFeNiMo0.15 high-entropy alloy (HEA) with a low volume
   fraction of a precipitates during rolling deformation at cryogenic
   temperature and room temperature were investigated. The stacking fault
   energy of the HEA was experimentally estimated via measuring the widths
   of the dissociated dislocations. Deformations at two temperature
   conditions were both characterized by dislocation activities and
   extensive nano-twinning, while the rate of these microstructural
   evolution was accelerated with the aid of the cryogenic temperature.
   Abundant microbands, nanotwins and stacking faults were detected during
   deformation under both temperature conditions. Moreover, the hexagonal
   close-packed structure can only be observed in the cryogenic rolled
   sample, which was produced via the glide of Shockley partials on every
   other \{111\}(FCC) plane. At the late deformation stage of cryogenic
   rolling, the nanotwins were markedly distorted or even fractured, and
   shear bands were also formed. The contributions of different
   strengthening mechanisms of cryogenic rolling were discussed.}},
DOI = {{10.1016/j.msea.2019.05.078}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000472813900061}},
}

@article{ ISI:000472813900043,
Author = {Zhao, Zhilei and Xiao, Zhu and Li, Zhou and Qiu, Wenting and Jiang,
   Hongyun and Lei, Qian and Liu, Zeru and Jiang, Yanbin and Zhang,
   Sangjian},
Title = {{Microstructure and properties of a Cu-Ni-Si-Co-Cr alloy with high
   strength and high conductivity}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{759}},
Pages = {{396-403}},
Month = {{JUN 24}},
Abstract = {{A novel Cu-1.01\%Ni-0.28\%Si-0.14\%Co-0.45\%Cr (mass percent) alloy with
   high strength and high conductivity was fabricated. Microstructure,
   mechanical and electrical properties of the alloy after multi-stage
   thermo-mechanical treatment were investigated in detail. The alloy has
   excellent comprehensive properties, with a tensile strength of 810 MPa,
   yield strength of 777 MPa, elongation of 3.4\%, and electrical
   conductivity of 57.5\%IACS (International Annealing Copper Standard).
   Three kinds of precipitates, (Cr,Co)(2)Si, (Ni,Co)(2)Si and Cr, form
   during aging treatment. Addition of Co element promotes the
   precipitation of Cr, Ni and Si solute elements from the matrix, while
   inhibits the growth of the (Cr,Co)(2)Si. The high strength of the alloy
   treated by multi-stage thermo-mechanical process is attributed to the
   dispersion strengthening, sub-structure strengthening, and work
   hardening. The multi-aging process and addition of Co effectively
   improve the electrical conductivity of the studied alloy. The high
   strength and high conductivity of studied alloy make it as a potential
   candidate for lead frame materials in electrical and electronics
   industry.}},
DOI = {{10.1016/j.msea.2019.05.003}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000472813900043}},
}

@article{ ISI:000467406500003,
Author = {Zhong, Z. H. and Xu, Q. and Mori, K. and Tokitani, M.},
Title = {{Thermal stability of microstructures and mechanical properties in a
   Fe-based Fe-Cr-Mn-Cu-Mo multi-component alloy}},
Journal = {{PHILOSOPHICAL MAGAZINE}},
Year = {{2019}},
Volume = {{99}},
Number = {{12}},
Pages = {{1515-1527}},
Month = {{JUN 18}},
Abstract = {{A Fe-based multi-component alloy, 60Fe-12Cr-10Mn-15Cu-3Mo, was designed
   and fabricated for nuclear applications in the present study. The
   crystal structure of the alloy is a similar to 85\% body - and 15\%
   face-centered cubic. A detailed microstructure analysis indicated that
   Cu segregated in the alloy to form Cu-rich precipitates, and the Cu
   precipitates grew during high temperature annealing at up to 773 K. The
   high temperature tensile test of the alloys showed that both the yield
   stress and tensile strength of the 60Fe-12Cr-10Mn-15Cu-3Mo were greater
   than those of typical austenitic and ferritic stainless steels at 773 K.
   The Vickers microhardness of the designed alloy did not change after
   high temperature annealing for 1 h at up to 1073 K. The results
   indicated that the designed alloy has the potential to be used for high
   temperature applications.}},
DOI = {{10.1080/14786435.2019.1585588}},
ISSN = {{1478-6435}},
EISSN = {{1478-6443}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000467406500003}},
}

@article{ ISI:000471227300021,
Author = {Rickman, J. M. and Chan, H. M. and Harmer, M. P. and Smeltzer, J. A. and
   Marvel, C. J. and Roy, A. and Balasubramanian, G.},
Title = {{Materials informatics for the screening of multi-principal elements and
   high-entropy alloys}},
Journal = {{NATURE COMMUNICATIONS}},
Year = {{2019}},
Volume = {{10}},
Month = {{JUN 13}},
Abstract = {{The field of multi-principal element or (single-phase) high-entropy (HE)
   alloys has recently seen exponential growth as these systems represent a
   paradigm shift in alloy development, in some cases exhibiting unexpected
   structures and superior mechanical properties. However, the
   identification of promising HE alloys presents a daunting challenge
   given the associated vastness of the chemistry/composition space. We
   describe here a supervised learning strategy for the efficient screening
   of HE alloys that combines two complementary tools, namely: (1) a
   multiple regression analysis and its generalization, a
   canonical-correlation analysis (CCA) and (2) a genetic algorithm (GA)
   with a CCA-inspired fitness function. These tools permit the
   identification of promising multi-principal element alloys. We implement
   this procedure using a database for which mechanical property
   information exists and highlight new alloys having high hardnesses. Our
   methodology is validated by comparing predicted hardnesses with alloys
   fabricated by arc-melting, identifying alloys having very high measured
   hardnesses.}},
DOI = {{10.1038/s41467-019-10533-1}},
Article-Number = {{2618}},
ISSN = {{2041-1723}},
ORCID-Numbers = {{Marvel, Christopher/0000-0002-6146-6862}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000471227300021}},
}

@article{ ISI:000474479900046,
Author = {Han Jiesheng and Wu Youzhi and Meng Junhu and Zhang Aijun and Su Bo},
Title = {{Preparation of MoNbTaW Refractory High-Entropy Alloys by Spark Plasma
   Sintering}},
Journal = {{RARE METAL MATERIALS AND ENGINEERING}},
Year = {{2019}},
Volume = {{48}},
Number = {{6}},
Pages = {{2021-2026}},
Month = {{JUN}},
Abstract = {{The MoNbTaW refractory high-entropy alloys were prepared by spark plasma
   sintering using pure metal powders as raw materials. The effects of
   processing parameters including sintering temperature and holding time
   on the phase, crystal structure, sintering behavior and mechanical
   properties of MoNbTaW refractory high-entropy alloys were studied. The
   results show that the single-phase bcc high-entropy alloy can be formed
   at the sintering temperature of 1800 degrees C with the holding time of
   5 min. The sintering temperature is the most important factor that
   affects the density, grain size and mechanical properties of the MoNbTaW
   refractory high-entropy alloy. The grain size, relative density,
   hardness and yield strength of the alloy increase with increasing the
   sintering temperature. When the sintering temperature is 2000 degrees C,
   the relative density of the alloy is 99.8\%, the yield strength is 1314
   +/- 14 MPa, and the fracture toughness is 5-6 MPa.m(1/2). The MoNbTaW
   refractory high-entropy alloy prepared by spark plasma sintering process
   has no chemical composition segregation and is a brittle material with
   the fracture mode of cleavage fracture.}},
ISSN = {{1002-185X}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000474479900046}},
}

@article{ ISI:000474479900045,
Author = {Jiang Shuying and Lin Zhifeng and Xu Hongming and Zhang Dalei},
Title = {{Microstructure and Properties of the As-cast and Annealed
   Al0.8CoCrFeNiTi0.2 High-Entropy Alloys}},
Journal = {{RARE METAL MATERIALS AND ENGINEERING}},
Year = {{2019}},
Volume = {{48}},
Number = {{6}},
Pages = {{2014-2020}},
Month = {{JUN}},
Abstract = {{Al0.8CoCrFeNiTi0.2 high entropy alloys were prepared by vacuum arc
   melting and then were treated by vacuum annealing at 600, 800 and 1000
   degrees C for 10 h. The microstructure, hardness, mechanical properties
   and corrosion resistance of the as-cast and annealed alloys were studied
   using XRD, OM, EPMA, hardness tester, universal testing machine, and
   electrochemical workstation. Microstructure analysis shows that the
   annealing treatments change the phase composition and microstructure
   morphology of the alloys. The as-cast alloy consists of bcc and fcc
   solid solutions, while the 600, 800 and 1000 degrees C annealed alloys
   consist of bcc, fcc and a phase. In the 800 degrees C annealed alloy,
   the a phase precipitates the most. During the annealing process, the
   single-phase solid solution dendrites in the as -cast shift to the thin
   layer-flake two-phase mixed structure. In the temperature range of 800
   degrees C and below, the higher the annealing temperature, the finer the
   mixed structure and the better the composition uniformity. But the 1000
   degrees C-annealed alloy has a large block single-phase solid solution
   precipitation, causing elements segregation to intensify. Hardness and
   compression tests show that all of the as-cast and three kinds of
   annealed alloys have high hardness, yield strength, fracture strength
   and plastic deformation, showing good comprehensive mechanical
   properties and resistance to temper softening. The 800 degrees
   C-annealed alloy has the highest hardness, yield strength and fracture
   strength, but the as-cast alloy have the best plasticity.
   Electrochemical corrosion tests show that the as-cast and three kinds of
   annealed alloys all have good corrosion resistance in the 3.5 wt\% NaCl
   solution and 0.5 mol/L H2SO4 solution and the corrosion resistance of
   the 800 degrees C-annealed alloy is best.}},
ISSN = {{1002-185X}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000474479900045}},
}

@article{ ISI:000464017000027,
Author = {Liu, Cong and Peng, Wenyi and Jiang, C. S. and Guo, Hongmin and Tao, Jun
   and Deng, Xiaohua and Chen, Zhaoxia},
Title = {{Composition and phase structure dependence of mechanical and magnetic
   properties for AlCoCuFeNix high entropy alloys}},
Journal = {{JOURNAL OF MATERIALS SCIENCE \& TECHNOLOGY}},
Year = {{2019}},
Volume = {{35}},
Number = {{6}},
Pages = {{1175-1183}},
Month = {{JUN}},
Abstract = {{In this study, the effects of composition and phase constitution on the
   mechanical properties and magnetic performance of AlCoCuFeNix (x = 0.5,
   0.8, 1.0, 1.5, 2.0, 3.0 in molar ratio) high entropy alloys (HEAs) were
   investigated. The results show that Ni element could lead to the
   evolution from face centered cubic (FCC), body centered cubic (BCC) and
   ordered BCC coexisting phase structure to a single FCC phase. The change
   of phase constitution enhances the plasticity but reduces the hardness
   and strength. One of the interesting points is the excellent soft
   magnetic properties of AlCoCuFeNix HEAs. Soft magnetic performance is
   dependent on composition and phase transition. AlCoCuFeNi1.5 alloy,
   achieving a better balance of mechanical and magnetic properties, could
   be applied as structure materials and soft magnetic materials (SMMs).
   High Curie temperature (>900 K) and strong phase stability below 1350 K
   of AlCoCuFeNi0.5 alloy confirm its practicability in a high-temperature
   environment. Atomic size difference (delta) is utilized as the critical
   parameter to explain the lattice strain and phase transformation induced
   by Ni addition. (C) 2019 Published by Elsevier Ltd on behalf of The
   editorial office of Journal of Materials Science \& Technology.}},
DOI = {{10.1016/j.jmst.2018.12.014}},
ISSN = {{1005-0302}},
ORCID-Numbers = {{Liu, Cong/0000-0002-5712-8705}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000464017000027}},
}

@article{ ISI:000477619700006,
Author = {Sekhar, R. Anand and Bakshi, Srinivasa Rao},
Title = {{Microstructure and Mechanical Properties of Ti-Al-Ni-Cr-Co-Fe-Based
   High-Entropy Alloys}},
Journal = {{TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS}},
Year = {{2019}},
Volume = {{72}},
Number = {{6, SI}},
Pages = {{1413-1416}},
Month = {{JUN}},
Note = {{International Conference on Advanced Materials and Manufacturing
   Processes for Strategic Sectors (ICAMPS), Thiruvananthapuram, INDIA, OCT
   25-27, 2018}},
Abstract = {{Four alloys with nominal compositions of TiAlNiCr, TiAlNiCrCo,
   TiAlNiCrFe and TiAlNiCrCoFe were synthesized through mechanical alloying
   followed by spark plasma sintering (SPS). After 8h of milling, all the
   alloys developed a major parental BCC phase. SPS done on the alloys
   revealed that the BCC phase was retained after SPS. Sintering promoted
   the formation of one more BCC phase thus making the final microstructure
   comprised of two BCC phases. The phases were characterized using X-ray
   diffraction and scanning electron microscope. Backscattered electron
   images of the samples indicated that one BCC phase was rich in Ni and
   Al, whereas the second BCC phase was rich in Cr, Co and Fe. All the
   alloys showed good hardness and mechanical strength with values above
   2000MPa except TiAlNiCr.}},
DOI = {{10.1007/s12666-019-01708-x}},
ISSN = {{0972-2815}},
EISSN = {{0975-1645}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000477619700006}},
}

@article{ ISI:000470944600018,
Author = {Zhang, L. J. and Guo, K. and Tang, H. and Zhang, M. D. and Fan, J. T.
   and Cui, P. and Ma, Y. M. and Yu, P. F. and Li, G.},
Title = {{The microstructure and mechanical properties of novel Al-Cr-Fe-Mn-Ni
   high-entropy alloys with trimodal distributions of coherent B2
   precipitates}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{757}},
Pages = {{160-171}},
Month = {{MAY 29}},
Abstract = {{A series of novel Co-free AlxCrFeMnNi (x = 0.5-0.8) high-entropy alloys
   (HEM) with trimodal distributions of coherent B2 precipitates was
   fabricated. A fundamental investigation on the microstructural evolution
   and mechanical properties of these trimodal alloys was conducted.
   Structural characterization shows that these HEM possess complex
   microstructures consisting of a disordered body-centered-cubic (BCC)
   matrix and trimodal-size distributions of the ordered coherent B2
   precipitates, (1) the primary B2 (p-B2) precipitates with a mean length
   of similar to 2 mu m located in the interdendritic region, (2) the
   secondary B2 (s-B2) precipitates with a mean diameter of similar to 450
   nm, and (3) the tertiary B2 (t-B2) precipitates with a mean diameter of
   similar to 20 nm located in the dendritic region. The trimodal HEM
   exhibit a good combination of high compressive yield strengths of
   1091-1200 MPa and the large plasticity ( > 45\%). The increments of the
   yield strengths caused by different strengthening mechanisms have been
   quantitatively and respectively estimated and compared with the
   experimental measurements. The study of the present trimodal BCC-B2 HEAs
   can provide a useful guidance for the future development of multimodal
   BCC-based HEM with excellent properties.}},
DOI = {{10.1016/j.msea.2019.04.104}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
ORCID-Numbers = {{Tang, Hu/0000-0003-1571-8843}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000470944600018}},
}

@article{ ISI:000470753700018,
Author = {Du, Zhenyu and Zuo, Jie and Bao, Nanyun and Yang, Mingli and Jiang, Gang
   and Zhang, Li},
Title = {{Effect of Ta addition on the structural, thermodynamic and mechanical
   properties of CoCrFeNi high entropy alloys}},
Journal = {{RSC ADVANCES}},
Year = {{2019}},
Volume = {{9}},
Number = {{29}},
Pages = {{16447-16454}},
Month = {{MAY 28}},
Abstract = {{Ta addition has considerable effects on the microstructures and
   mechanical performances of CoCrFeNi alloy systems. Structure search with
   the special quasirandom structure method and structure identification
   with first-principles calculations were carried out to investigate the
   structural, thermodynamic and mechanical properties of CoCrFeNiTax (x =
   0.0-1.0) high-entropy alloys in the fcc and bcc lattice frameworks. The
   predicted lattice parameters of identified structures are in agreement
   with available experiments. Phase transition between the fcc and bcc
   lattices was predicted for the lowest-energy structures with increasing
   Ta content. The predicted temperature dependence of specific heat
   capacity for the identified structures matches well with the
   Dulong-Petit, Kepp and Debye Models. Both vibration and configuration
   entropy contribute to the stabilization of alloy systems, while the
   latter is about 2-3 times greater than the former. The elastic constants
   and moduli vary with composition and phase structure. Ta atoms have
   preference to some atoms like Ni, and form relatively strong bonds with
   adjacent atoms. The introduction of Ta promotes the electron
   localization and favors the formation of mixed structures.}},
DOI = {{10.1039/c9ra03055g}},
ISSN = {{2046-2069}},
ResearcherID-Numbers = {{Yang, Mingli/E-9983-2012}},
ORCID-Numbers = {{Yang, Mingli/0000-0001-8590-8840}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000470753700018}},
}

@article{ ISI:000458776900017,
Author = {Zhang, Hang and Yang, Yaoxuan and Liu, Lei and Chen, Chen and Wang, Tan
   and Wei, Ran and Zhang, Tao and Dong, Yaqiang and Li, Fushan},
Title = {{A novel FeCoNiCr0.2Si0.2 high entropy alloy with an excellent balance of
   mechanical and soft magnetic properties}},
Journal = {{JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS}},
Year = {{2019}},
Volume = {{478}},
Pages = {{116-121}},
Month = {{MAY 15}},
Abstract = {{A novel FeCoNiCr0.2Si0.2 (at \%, thereafter, all mean atomic ratios)
   high-entropy alloy (HEA) was synthesized. The as-cast HEA exhibits a
   combination of excellent mechanical and magnetic properties with a large
   plastic deformation of about 60\% and low coercivity (H-c) of about
   187.9 A/m, which are prominent in the HEAs reported so far. Based on the
   large plasticity, rolling and annealing were adopted as a strategy for
   improving magnetic and mechanical properties of the HEA. The process of
   rolling followed by annealing leads to the significant enhancement of
   the yield strength (YS) and ultimate tensile strength (UTS) of alloy
   rolled at 773 K, increasing to 320 and 920 MPa respectively. Meanwhile
   the large plasticity and good soft magnetic properties remain. The
   enhancement mechanism of annealed after rolling was analyzed.
   Consequently, the optimal balance of magnetic and mechanical properties
   is achieved. The present work suggests a promising way to develop HEAs
   with a combination of excellent magnetic and mechanical properties.}},
DOI = {{10.1016/j.jmmm.2019.01.096}},
ISSN = {{0304-8853}},
EISSN = {{1873-4766}},
ResearcherID-Numbers = {{Dong, Yaqiang/C-5370-2017}},
ORCID-Numbers = {{Dong, Yaqiang/0000-0003-1663-8052}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000458776900017}},
}

@article{ ISI:000469721000001,
Author = {Ni, Xuyao and Dai, Ting and Lu, Tao and Pan, Jiayi and Li, Miao and Dai,
   Jianwen},
Title = {{Microstructure and properties of CrMnFeCoNi high-entropy alloy prepared
   by mechanical alloying and spark plasma sintering (vol 62, pg 38, 2018)}},
Journal = {{POWDER METALLURGY}},
Year = {{2019}},
Volume = {{62}},
Number = {{3}},
Pages = {{212}},
Month = {{MAY 27}},
DOI = {{10.1080/00325899.2019.1611047}},
Early Access Date = {{MAY}},
Early Access Year = {{2019}},
ISSN = {{0032-5899}},
EISSN = {{1743-2901}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000469721000001}},
}

@article{ ISI:000466976300011,
Author = {Gomez-Esparza, C. D. and Perez-Bustamante, R. and Alvarado-Orozco, J. M.
   and Munoz-Saldana, J. and Martinez-Sanchez, R. and Olivares-Ramirez, J.
   M. and Duarte-Moller, A.},
Title = {{Microstructural evaluation and nanohardness of an AlCoCuCrFeNiTi
   high-entropy alloy}},
Journal = {{INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS}},
Year = {{2019}},
Volume = {{26}},
Number = {{5}},
Pages = {{634-641}},
Month = {{MAY}},
Abstract = {{An AlCoCuCrFeNiTi high-entropy alloy (HEA) was prepared by mechanical
   alloying and sintering to study the effect of Ti addition to the widely
   studied AlCoCuCrFeNi system. The structural and microstructural
   characteristics were investigated by X-ray diffraction (XRD), scanning
   electron microscopy (SEM), and transmission electron microscopy (TEM).
   The formation of four micrometric phases was detected: a Cu-rich phase
   with a face-centered cubic (fcc) structure, a body-centered cubic (bcc)
   solid solution with Cu-rich plate-like precipitates (fcc), an ordered
   bcc phase, and a tetragonal structure. The XRD patterns corroborate the
   presence of a mixture of bcc-, fcc-, and tetragonal-structured phases.
   The Vickers hardness of the alloy under study was more than twice that
   of the AlCoCuCrFeNi alloy. Nanoindentation tests were performed to
   evaluate the mechanical response of the individual phases to elucidate
   the relationship between chemical composition, crystal structure, and
   mechanical performance of the multiphase microstructure of the
   AlCoCuCrFeNiTi HEA.}},
DOI = {{10.1007/s12613-019-1771-3}},
ISSN = {{1674-4799}},
EISSN = {{1869-103X}},
ResearcherID-Numbers = {{Olivares Ramirez, Juan Manuel/S-1067-2018
   }},
ORCID-Numbers = {{Olivares Ramirez, Juan Manuel/0000-0003-2427-6936
   Munoz Saldana, Juan/0000-0001-5188-6305}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000466976300011}},
}

@article{ ISI:000465365300021,
Author = {Huang, Wenjiang and Martin, Pedro and Zhuang, Houlong L.},
Title = {{Machine-learning phase prediction of high-entropy alloys}},
Journal = {{ACTA MATERIALIA}},
Year = {{2019}},
Volume = {{169}},
Pages = {{225-236}},
Month = {{MAY 1}},
Abstract = {{High-entropy alloys (HEM) have been receiving intensive attention due to
   their unusual properties that largely depend on the selection among
   three phases: solid solution (SS), intermetallic compound (IM), and
   mixed SS and IM (SS + IM). Accurate phase prediction is therefore
   crucial for guiding the selection of a combination of elements to form a
   HEA with desirable properties. It is widely accepted that the phase
   selection is correlated with elemental features such as valence electron
   concentration and the formation enthalpy, leading to a set of parametric
   phase-selection rules {[}1]. Previous studies on predicting the phase
   selection employed density functional theory (DFT) calculations to
   obtain some correlated parameters. But DFT calculations are time
   consuming and exhibit uncertainties in terms of treating the d orbitals
   of transition-metal atoms that are often components of HEAs. Here we
   employ machine learning (ML) algorithms to efficiently explore phase
   selection rules using a comprehensive experimental dataset consisting of
   401 different HEAs including 174 SS, 54 IM, and 173 SS + IM phases. We
   adopt three different ML algorithms: K-nearest neighbours (KNN), support
   vector machine (SVM), and artificial neural network (ANN). To avoid
   overfitting, we divide the whole dataset into four nearly equal portions
   to perform a cross validation. For the classification of the three
   phases at the same time, the testing accuracy values from the KNN, SVM
   and ANN calculations achieve 68.6\%, 64.3\% and 743\%, respectively. We
   then focus on the classification of two of the three phases using SVM
   and ANN. We find that the testing accuracy values using ANN in
   classifying the SS and IM phases, the SS + IM and IM phases, and the SS
   and SS + IM phases, are 86.7\%, 94.3\%, and 78.9\%, respectively, which
   are higher than the corresponding testing accuracy values using SVM. As
   such, the trained ANN model performs the best among the three ML
   algorithms and is useful for predicting the phases of new HEAs. Our work
   provides an alternative route of computational design of HEAs, which is
   also applicable to accelerate the discovery of other metal alloys for
   modern engineering applications. (C) 2019 Acta Materialia Inc. Published
   by Elsevier Ltd. All rights reserved.}},
DOI = {{10.1016/j.actamat.2019.03.012}},
ISSN = {{1359-6454}},
EISSN = {{1873-2453}},
ORCID-Numbers = {{Zhuang, Houlong/0000-0001-7276-7938}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000465365300021}},
}

@article{ ISI:000466359700005,
Author = {Mikel Sanchez, Jon and Vicario, Iban and Albizuri, Joseba and Guraya,
   Teresa and Maria Acuna, Eva},
Title = {{Design, Microstructure and Mechanical Properties of Cast Medium Entropy
   Aluminium Alloys}},
Journal = {{SCIENTIFIC REPORTS}},
Year = {{2019}},
Volume = {{9}},
Month = {{MAY 1}},
Abstract = {{In this work, the design, microstructures and mechanical properties of
   five novel non-equiatomic lightweight medium entropy alloys were
   studied. The manufactured alloys were based on the Al65Cu5Mg5Si15Zn5X5
   and Al70Cu5Mg5Si10Zn5X5 systems. The formation and presence of phases
   and microstructures were studied by introducing Fe, Ni, Cr, Mn and Zr.
   The feasibility of CALPHAD method for the design of new alloys was
   studied, demonstrating to be a good approach in the design of medium
   entropy alloys, due to accurate prediction of the phases, which were
   validated via X-ray diffraction and scanning electron microscopy with
   energy dispersive spectroscopy. In addition, the alloys were
   manufactured using an industrial-scale die-casting process to make the
   alloys viable as engineering materials. In terms of mechanical
   properties, the alloys exhibited moderate plastic deformation and very
   high compressive strength up to 644 MPa. Finally, the reported
   microhardness value was in the range of 200 HV0.1 to 264 HV0.1, which
   was two to three times higher than those of commercial Al alloys.}},
DOI = {{10.1038/s41598-019-43329-w}},
Article-Number = {{6792}},
ISSN = {{2045-2322}},
ResearcherID-Numbers = {{ALBIZURI, JOSEBA/D-5746-2013
   }},
ORCID-Numbers = {{ALBIZURI, JOSEBA/0000-0002-4516-694X
   Sanchez, Jon Mikel/0000-0003-4062-8137}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000466359700005}},
}

@article{ ISI:000472675900012,
Author = {Zhang, Cui and Liu, Bin and Liu, Yong and Fang, Qihong and Guo, Wenmin
   and Yang, Hu},
Title = {{Effects of Annealing on Microstructure and Mechanical Properties of
   Metastable Powder Metallurgy CoCrFeNiMo0.2 High Entropy Alloy}},
Journal = {{ENTROPY}},
Year = {{2019}},
Volume = {{21}},
Number = {{5}},
Month = {{MAY}},
Abstract = {{A CoCrFeNiMo0.2 high entropy alloy (HEA) was prepared through powder
   metallurgy (P/M) process. The effects of annealing on microstructural
   evolution and mechanical properties of P/M HEAs were investigated. The
   results show that the P/M HEA exhibit a metastable FCC single-phase
   structure. Subsequently, annealing causes precipitation in the grains
   and at the grain boundaries simultaneously. As the temperature
   increases, the size of the precipitates grows, while the content of the
   precipitates tends to increase gradually first, and then decrease as the
   annealing temperature goes up to 1000 degrees C. As the annealing time
   is prolonged, the size and content of the precipitates gradually
   increases, eventually reaching a saturated stable value. The mechanical
   properties of the annealed alloys have a significant correspondence with
   the precipitation behavior. The larger the volume fraction and the size
   of the precipitates, the higher the strength and the lower the
   plasticity of the HEA. The CoCrFeNiMo0.2 high entropy alloy, which
   annealed at 800 degrees C for 72 h, exhibited the most excellent
   mechanical properties with the ultimate tensile strength of about 850
   MPa and an elongation of about 30\%. Nearly all of the annealed HEAs
   exhibit good strength-ductility combinations due to the significant
   precipitation enhancement and nanotwinning. The separation of the coarse
   precipitation phase and the matrix during the deformation process is the
   main reason for the formation of micropores. Formation of large volume
   fraction of micropores results in a decrease in the plasticity of the
   alloy.}},
DOI = {{10.3390/e21050448}},
Article-Number = {{448}},
ISSN = {{1099-4300}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000472675900012}},
}

@article{ ISI:000465500700135,
Author = {Jia, Yuefei and Jia, Yandong and Wu, Shiwei and Ma, Xindi and Wang, Gang},
Title = {{Novel Ultralight-Weight Complex Concentrated Alloys with High Strength}},
Journal = {{MATERIALS}},
Year = {{2019}},
Volume = {{12}},
Number = {{7}},
Month = {{APR 10}},
Abstract = {{To explore a novel high strength and low modulus ultralight-weight
   complex concentrated alloys (ULW-CCAs), a series of light alloys are
   designed and explored based on some low-density and low modulus
   elements, such as Al, Li, Mg, Ca, Si, and Y. An
   Al19.9Li30Mg35Si10Ca5Y0.1 (at \%) CCA with a high specific strength of
   327 KPam(-3) is successfully developed. After adjusting the composition,
   the Al15Li35Mg48Ca1Si1 CCA with the good compressive plasticity is
   successfully developed. The Al15Li38Mg45Ca0.5Si1.5 and
   Al15Li39Mg45Ca0.5Si0.5 CCAs exhibit good plasticity of >45\%, and >60\%,
   respectively. These ULW-CCAs show the high specific strength, good
   ductility, and low Young's modulus, as compared with the previously
   reported CCAs.}},
DOI = {{10.3390/ma12071136}},
Article-Number = {{1136}},
ISSN = {{1996-1944}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000465500700135}},
}

@article{ ISI:000459814000027,
Author = {Tang, Zhaowu and Zhang, Shang and Cai, Ruipeng and Zhou, Qing and Wang,
   Haifeng},
Title = {{Designing High Entropy Alloys with Dual fcc and bcc Solid-Solution
   Phases: Structures and Mechanical Properties}},
Journal = {{METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
   MATERIALS SCIENCE}},
Year = {{2019}},
Volume = {{50A}},
Number = {{4}},
Pages = {{1888-1901}},
Month = {{APR}},
Abstract = {{High entropy alloys (HEAs) with a single fcc phase are usually ductile
   but not strong, while HEAs with a single bcc phase have high strength
   but low ductility. Therefore, the combination of fcc and bcc phases was
   adopted to optimize the mechanical properties. Based on a latest data
   collection of reported HEAs with a single fcc phase, with dual fcc and
   bcc phases, and with a single bcc phase, the current work shows that the
   average valence electron concentration (VEC) and its standard deviation
   (VEC) can describe quantitatively phase selection between the fcc and
   bcc phases in HEAs. Highest (lowest) hardness, highest (lowest)
   strength, and lowest (highest) ductility were found at the same critical
   value of VEC{*} approximate to 6.13 (VEC{*} approximate to 0.207), which
   corresponds to the HEA with a single bcc (fcc) phase. The current work
   provides some quantitative rules for designing HEAs with dual fcc and
   bcc phases as well as modulating strength and ductility.}},
DOI = {{10.1007/s11661-019-05131-1}},
ISSN = {{1073-5623}},
EISSN = {{1543-1940}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000459814000027}},
}

@article{ ISI:000464391400001,
Author = {Tan, Yiming and Li, Jinshan and Wang, Jun and Kou, Hongchao},
Title = {{Effect of Mn Addition on the Microstructures and Mechanical Properties
   of CoCrFeNiPd High Entropy Alloy}},
Journal = {{ENTROPY}},
Year = {{2019}},
Volume = {{21}},
Number = {{3}},
Month = {{MAR 16}},
Abstract = {{CoCrFeNiPdMnx (x = 0, 0.2, 0.4, 0.6, 0.8) high entropy alloys (HEAs)
   were prepared and characterized. With an increase in Mn addition, the
   microstructures changed from dendrites (CoCrFeNiPd with a single
   face-centered-cubic (FCC) phase) to divorced eutectics (CoCrFeNiPdMn0.2
   and CoCrFeNiPdMn0.4), to hypoeutectic microstructures (CoCrFeNiPdMn0.6),
   and finally to seaweed eutectic dendrites (CoCrFeNiPdMn0.8). The
   addition of Mn might change the interface energy anisotropy of both the
   FCC/liquid and MnPd-rich intermetallic compound/liquid interfaces, thus
   forming the seaweed eutectic dendrites. The hardness of the FCC phase
   was found to be highly related to the solute strengthening effect, the
   formation of nanotwins and the transition from CoCrFeNiPd-rich to
   CoCrFeNi-rich FCC phase. Hierarchical nanotwins were found in the
   MnPd-rich intermetallic compound and a decrease in either the spacing of
   primary twins or secondary twins led to an increase in hardness. The
   designing rules of EHEAs were discussed and the pseudo binary method was
   revised accordingly.}},
DOI = {{10.3390/e21030288}},
Article-Number = {{288}},
ISSN = {{1099-4300}},
ResearcherID-Numbers = {{WANG, Jun/A-1526-2015}},
ORCID-Numbers = {{WANG, Jun/0000-0001-8101-2967}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000464391400001}},
}

@article{ ISI:000457664900099,
Author = {Gwalani, Bharat and Pohan, Rizaldy M. and Waseem, Owais Ahmed and Alam,
   Talukder and Hong, Soon Hyung and Ryu, Ho Jin and Banerjee, Rajarshi},
Title = {{Strengthening of Al0.3CoCrFeMnNi-based ODS high entropy alloys with
   incremental changes in the concentration of Y2O3}},
Journal = {{SCRIPTA MATERIALIA}},
Year = {{2019}},
Volume = {{162}},
Pages = {{477-481}},
Month = {{MAR 15}},
Abstract = {{The high-entropy alloy (HEA) composite Al0.3CoCrFeMnNi based on the
   face-centered-cubic (FCC) system and reinforced with 0-3 vol\% Y2O3 was
   processed by mechanical alloying followed by spark plasma sintering
   (SPS). The compressive yield strength of the Alo(3)CoCrFeMnNi
   high-entropy alloy (HEA) increased phenomenally, from 0.98 GPa (0 vol\%
   Y2O3) to 1.76 GPa (3 vol\% Y2O3). A quantitative analysis by atom probe
   tomography (APT) suggested the in-situ formation of complex oxide
   resulting from the reaction of Y2O3 with the HEA matrix during
   processing, enhancing the strength. Using the dispersion-barrier
   hardening model, the strengthening by dispersoids in Ala(3)CoCrFeMnNi
   with Y2O3 was calculated, and closely matched the experimental results.
   (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights
   reserved.}},
DOI = {{10.1016/j.scriptamat.2018.12.021}},
ISSN = {{1359-6462}},
ResearcherID-Numbers = {{Ryu, Ho Jin/O-4989-2019
   Waseem, Owais Ahmed/W-1100-2019}},
ORCID-Numbers = {{Ryu, Ho Jin/0000-0002-3387-7381
   Waseem, Owais Ahmed/0000-0002-3928-9644}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000457664900099}},
}

@article{ ISI:000461369400015,
Author = {Gao, Shuo and Kong, Teng and Zhang, Man and Chen, Xiao and Sui, Yan Wei
   and Ren, Yao Jian and Qi, Ji Qiu and Wei, Fu Xiang and He, Ye Zeng and
   Meng, Qing Kun and Sun, Zhi},
Title = {{Effects of titanium addition on microstructure and mechanical properties
   of CrFeNiTix (x=0.2-0.6) compositionally complex alloys}},
Journal = {{JOURNAL OF MATERIALS RESEARCH}},
Year = {{2019}},
Volume = {{34}},
Number = {{5, SI}},
Pages = {{819-828}},
Month = {{MAR 14}},
Abstract = {{CrFeNiTix (x = 0.2, 0.3, 0.4, 0.5, and 0.6 molar ratio) compositionally
   complex alloys were fabricated by vacuum arc melting to investigate the
   microstructure, hardness, and compressive properties. The results
   revealed that CrFeNiTix alloys consisted of the principal face-centered
   cubic (FCC) phase and body-centered cubic (BCC) solid solution, with an
   amount of (Ni, Ti)-rich hexagonal close-packed phase. CrFeNiTix alloys
   exhibited the typical dendrite. Ti0.2 and Ti0.3 alloys were composed of
   FCC and BCC solid solutions in the dendrite, as well as epsilon (Ni3Ti)
   and R (Ni2.67Ti1.33) phases in the inter-dendrite, simultaneously. For
   Ti0.4, Ti0.5, and Ti0.6 alloys, (Fe, Cr)-rich solid solution separated
   out and e phase transformed into R phase gradually. Meanwhile, TEM
   analysis indicated that Ti0.4 alloy matrix consisted of the principal
   FCC phase containing (Ni, Ti)-rich intragranular nanoprecipitates. The
   hardness values of CrFeNiTix alloys were increased with the addition of
   Ti content and the high compressive strength of CrFeNiTix alloys was
   maintained, which was attributed to the solid solution strengthening and
   precipitation hardening.}},
DOI = {{10.1557/jmr.2019.40}},
ISSN = {{0884-2914}},
EISSN = {{2044-5326}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000461369400015}},
}

@article{ ISI:000461369400010,
Author = {Kumar, Devesn and Sharma, Vishnu K. and Prasad, Y. V. S. S. and Kumar,
   Vinod},
Title = {{Materials-structure-property correlation study of spark plasma sintered
   AlCuCrFeMnWx (x=0, 0.05, 0.1, 0.5) high-entropy alloys}},
Journal = {{JOURNAL OF MATERIALS RESEARCH}},
Year = {{2019}},
Volume = {{34}},
Number = {{5, SI}},
Pages = {{767-776}},
Month = {{MAR 14}},
Abstract = {{A novel series of nanocrystalline AlCuCrFeMnWx (x = 0, 0.05, 0.1, 0.5)
   high-entropy alloys (HEAs) were synthesized by mechanical alloying
   followed by spark plasma sintering. The phase evolution of the current
   HEAs was studied using X-ray diffraction (XRD), transmission electron
   microscopy, and selected area electron diffraction. The XRD of the
   AlCuCrFeMn sintered HEA shows evolution of ordered B2 phase (AlFe type),
   sigma phase (Cr rich), and FeMn phase. AlCuCrFeMnWx (x = 0.05, 0.1, 0.5
   mol) shows formation of ordered B2 phases, sigma phases, FeMn phases,
   and BCC phases. Micro-hardness of the AlCuCrFeMnWx samples was measured
   by Vickers microindentation and the maximum value observed is 780 +/- 12
   HV. As the tungsten content increases, the fracture strength under
   compression increases from 1010 to 1510 MPa. Thermodynamic parameters of
   present alloys confirm the crystalline phase formation, and finally
   structure-property relationship was proposed by conventional
   strengthening mechanisms.}},
DOI = {{10.1557/jmr.2019.18}},
ISSN = {{0884-2914}},
EISSN = {{2044-5326}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000461369400010}},
}

@article{ ISI:000461369400004,
Author = {Rahul, M. R. and Samal, Sumanta and Phanikumar, Gandham},
Title = {{Effect of niobium addition in FeCoNiCuNbx high-entropy alloys}},
Journal = {{JOURNAL OF MATERIALS RESEARCH}},
Year = {{2019}},
Volume = {{34}},
Number = {{5, SI}},
Pages = {{700-708}},
Month = {{MAR 14}},
Abstract = {{In the design of high-entropy alloys (HEAs) with desired properties,
   identifying the effects of elements plays an important role. HEAs with
   eutectic microstructure can be obtained by judiciously modifying the
   alloy compositions. In this study, the effect of Nb addition to
   FeCoNiCuNbx (x = 0.5, 5, 7.5, 11.6, 15) alloys was studied by varying
   the Nb concentration (at.\%). FeCoNiCuNb0.5 HEA shows liquid phase
   separation to form Cu-rich and FeCoNiCu-rich phases. Detailed
   solidification paths are proposed for these alloys, which show eutectic,
   peritectic, and pseudo quasi-peritectic reactions. Increasing Nb content
   promotes the liquid phase separation tendency and causes the formation
   of Cu-rich spheres. The effect of Nb on the FeCoNiCu-rich phase was
   studied based on the nanoindentation and correlated with nanohardness.
   The compressive deformation properties of these alloys are studied at
   room temperature and high temperature and correlated with
   microstructure. Fractography results show the mode of fracture and are
   correlated with the microstructure obtained.}},
DOI = {{10.1557/jmr.2019.36}},
ISSN = {{0884-2914}},
EISSN = {{2044-5326}},
ResearcherID-Numbers = {{Samal, Sumanta/S-2867-2019
   Gandham, Phanikumar/B-7915-2008}},
ORCID-Numbers = {{Gandham, Phanikumar/0000-0002-5198-317X}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000461369400004}},
}

@article{ ISI:000461369400002,
Author = {Vaidya, Mayur and Muralikrishna, Garlapati Mohan and Murty, Budaraju
   Srinivasa},
Title = {{High-entropy alloys by mechanical alloying: A review}},
Journal = {{JOURNAL OF MATERIALS RESEARCH}},
Year = {{2019}},
Volume = {{34}},
Number = {{5, SI}},
Pages = {{664-686}},
Month = {{MAR 14}},
Abstract = {{Mechanical alloying (MA) followed by sintering has been one of the most
   widely adopted routes to produce nanocrystalline high-entropy alloys
   (HEAs). Enhanced solid solubility, room temperature processing, and
   homogenous alloy formation are the key benefits provided by MA. Spark
   plasma sintering has largely been used to obtain high-density HEA
   pellets from milled powders. However, there are many challenges
   associated with the production of HEAs using MA, which include
   contamination during milling and high propensity of oxidation. The
   present review provides a comprehensive understanding of various HEAs
   produced by MA so far, with the aim to bring out the governing aspects
   of phase evolution, thermal stability, and properties achieved. The
   limitations and challenges of the process are also critically assessed
   with a possible way forward. The paper also compares the results
   obtained from high-pressure torsion, another severe plastic deformation
   technique.}},
DOI = {{10.1557/jmr.2019.37}},
ISSN = {{0884-2914}},
EISSN = {{2044-5326}},
ORCID-Numbers = {{Mohan Muralikrishna, G./0000-0002-5841-7496}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000461369400002}},
}

@article{ ISI:000460492600025,
Author = {Aguilar-Hurtado, Jose Y. and Vargas-Uscategui, Alejandro and
   Zambrano-Mera, Dario and Palma-Hillerns, Rodrigo},
Title = {{The effect of boron content on the microstructure and mechanical
   properties of Fe50-XMn30Co10Cr10BX (x=0, 0.3, 0.6 and 1.7 wt\%)
   multi-component alloys prepared by arc-melting}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{748}},
Pages = {{244-252}},
Month = {{MAR 4}},
Abstract = {{High and Medium-Entropy Alloys (HEM and MEAs) are a novel type of
   materials, which due to the reduction in configurational entropy, can
   offer an excellent combination of properties, such as, high strength,
   high ductility and moderate hardness. During the study, four alloys
   based on Fe50-XMn30Co10Cr10BX system (x = 0, 0.3, 0.6 and 1.7 wt\%) were
   manufactured by arc melting. The microstructure of the materials was
   analyzed by optical microscopy, scanning electron microscopy, and X-ray
   diffraction. The Vickers microhardness of these alloys were also
   measured. Detailed characterization revealed the formation of a
   dual-phase matrix (fcc + hcp) due to the reduction in the stability of
   the fcc phase that led to a thermal induced partial martensitic
   transformation into a epsilon-hcp phase. The addition of boron promoted
   the formation of M2B-type borides (M = Cr, Fe), whose content increased
   with the addition of B. Changes in the phase composition, specifically
   the decrease of the hcp phase, were mainly due to the loss of manganese
   content. The microstrain analysis showed the absence of residual
   stresses in the crystal lattice due to a decrease in the dislocation's
   density after the martensitic transformation. When boron content was
   brought from 0 wt\% to 1.7 wt\%, the microhardness of the material
   increased from 296HV to 452 HV, which is comparable to the microhardness
   of high-manganese steel. Finally, the thermodynamic parameter Phi was
   calculated using a phase prediction package AlloyASAP, allowing to
   establish that boron addition to Fe50Mn30Co10Cr10 originated
   medium-entropy alloys (Phi < 1), while the absence of boron give a
   high-entropy alloy (Phi > 1).}},
DOI = {{10.1016/j.msea.2019.01.088}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
ResearcherID-Numbers = {{Vargas-Uscategui, Alejandro/H-3731-2016}},
ORCID-Numbers = {{Vargas-Uscategui, Alejandro/0000-0002-4365-8748}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000460492600025}},
}

@article{ ISI:000460492600007,
Author = {Wu, Margaret and Li, Zhiming and Gault, Baptiste and Munroe, Paul and
   Baker, Ian},
Title = {{The effects of carbon on the phase stability and mechanical properties
   of heat-treated FeNiMnCrAl high entropy alloys}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{748}},
Pages = {{59-73}},
Month = {{MAR 4}},
Abstract = {{This work systematically investigates the effect of carbon on the phase
   stability and room- temperature tensile performance of an annealed
   Fe40.4Ni11.3Mn34.8Al7.5Cr6 (at\%) high entropy alloy without (HEA) and
   with 1.1\% carbon (CHEA). Four annealing conditions were investigated:
   773 K for 13 d and 42 d, 973 K for 20 d, and 1073 K and 1423 K for 24 h.
   The resulting microstructures were analyzed using a combination of
   scanning electron microscopy (SEM), transmission electron microscopy
   (TEM), energy dispersive spectroscopy (EDS), and atom probe tomography
   (APT). Vickers hardness testing and room- temperature tensile testing
   were used to determine the mechanical properties of the annealed HEA and
   the CHEA. APT composition profiles revealed fine Ni,Mn,Al-enriched
   matrix precipitates in the CHEA annealed at 773 K for 13 d. After ageing
   at 773 K for 42 d, colonies of (Ni,Fe)(2)MnAl- enriched Heusler phase
   lamellae were observed at the grain boundaries (GBs) and in the matrix
   for the HEA, while GB lamellar colonies of Mn,Cr-enriched M23C6 carbides
   were observed for the CHEA. Due to the presence of the GB carbides, the
   resulting room-temperature elongation to fracture for the CHEA annealed
   at 773 K for 42 d was similar to 1\% compared to similar to 11\% for the
   HEA given the same anneal. At higher annealing temperatures, the
   microstructure contains Ni,Al-rich and Mn,Cr,C-rich precipitates that
   alternate along the GBs and appear to be associated with each other in
   the matrix. Electron diffraction analysis indicates the aforementioned
   Ni,Al-precipitates and Mn,Cr-carbides have b.c.c. and f.c.c. crystal
   structures, respectively. Once again, a low elongation to fracture (2\%)
   was seen for the carbon-containing material compared to its un-doped
   counterpart (23\%) which solely contained NLAl-rich b.c.c. precipitates.}},
DOI = {{10.1016/j.msea.2019.01.083}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
ResearcherID-Numbers = {{LI, Zhiming/F-5049-2012}},
ORCID-Numbers = {{LI, Zhiming/0000-0002-8170-5621}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000460492600007}},
}

@article{ ISI:000458606500001,
Author = {Huang, Tiandang and Jiang, Hui and Lu, Yiping and Wang, Tongmin and Li,
   Tingju},
Title = {{Effect of Sc and Y addition on the microstructure and properties of
   HCP-structured high-entropy alloys}},
Journal = {{APPLIED PHYSICS A-MATERIALS SCIENCE \& PROCESSING}},
Year = {{2019}},
Volume = {{125}},
Number = {{3}},
Month = {{MAR}},
Abstract = {{This study aimed to design and prepare the following four kinds of
   refractory high-entropy alloys (RHEAs): TiZrHf, TiZrHfSc, TiZrHfY, and
   TiZrHfScY. All the four RHEAs showed a hexagonal close-packed
   (HCP)-based structure. Both the strength and ductility increased in the
   TiZrHfSc alloy compared with the TiZrHf alloy because of the addition of
   Sc element and the formation of a fine needle-like lamellar structure in
   the former. The mechanical properties of TiZrHfY and TiZrHfScY alloys
   decreased after the addition of Y element because of the segregation.
   The conductivity of TiZrHf, TiZrHfSc, TiZrHfY, and TiZrHfScY alloys
   decreased compared with that of pure Ti, Zr, Hf, Sc, and Y elements.
   However, their resistivity was comparable to the traditional electrical
   resistivity of the alloys at room temperature because of the serious
   lattice distortion in the HEAs. All the four alloys showed a typical
   paramagnetic behavior. These characteristics make the alloys suitable
   for industrial applications.}},
DOI = {{10.1007/s00339-019-2484-1}},
Article-Number = {{180}},
ISSN = {{0947-8396}},
EISSN = {{1432-0630}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000458606500001}},
}

@article{ ISI:000453927400051,
Author = {Molnar, David and Vida, Adam and Huang, Shuo and Chinh, Nguyen Q.},
Title = {{The effect of cooling rate on the microstructure and mechanical
   properties of NiCoFeCrGa high-entropy alloy}},
Journal = {{JOURNAL OF MATERIALS SCIENCE}},
Year = {{2019}},
Volume = {{54}},
Number = {{6}},
Pages = {{5074-5082}},
Month = {{MAR}},
Abstract = {{The effect of cooling rate on the microstructure and mechanical
   properties of equimolar NiCoFeCrGa high-entropy alloy (HEA) was studied
   by scanning electron microscopy, energy-dispersive X-ray spectroscopy
   and electron backscatter diffraction (EBSD), as well as by microhardness
   tests. Experimental results show that the cooling rate has a crucial
   impact on the developing microstructure which has a mixture of twoFCC
   and BCCphases, leading to a self-similarity of the solidified structure
   formed in the sample. Furthermore, the cooling rate influences both the
   composition of the two phase-components and the ratio of their volume
   fractions, determining the mechanical properties of the sample. The
   present results confirm the grouping of Co, Fe and Cr in the FCC phase
   and that of Ni and Ga in BCC phase in the NiCoFeCrGa high-entropy alloy
   system. An empirical rule is suggested to predict how the
   phase-components can be expected in this complex high-entropy alloy.}},
DOI = {{10.1007/s10853-018-03196-8}},
ISSN = {{0022-2461}},
EISSN = {{1573-4803}},
ResearcherID-Numbers = {{Nguyen, Quang Chinh/I-5893-2017
   }},
ORCID-Numbers = {{Nguyen, Quang Chinh/0000-0002-6610-7308
   Molnar, David/0000-0002-7355-1941}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000453927400051}},
}

@article{ ISI:000459384700007,
Author = {Yang, Zhongsheng and Wang, Zhijun and Wu, Qingfeng and Zheng, Tao and
   Zhao, Purui and Zhao, Jinkai and Chen, Jiayin},
Title = {{Enhancing the mechanical properties of casting eutectic high entropy
   alloys with Mo addition}},
Journal = {{APPLIED PHYSICS A-MATERIALS SCIENCE \& PROCESSING}},
Year = {{2019}},
Volume = {{125}},
Number = {{3}},
Month = {{MAR}},
Abstract = {{Eutectic high entropy alloys (EHEAs) exhibit excellent mechanical
   properties in the as-cast condition. In this paper, Mo element was
   chosen to further strengthen the EHEAs by solid solution strengthening.
   The microstructures, phase compositions and mechanical properties of
   Co30Cr10Fe10Al18Ni32-xMox (x=0, 1, 2, 3) alloys were investigated. It
   was found that Mo acts as a solid solution strengthening element in the
   face-centered cubic (FCC) and body-centered cubic (BCC) phases.
   Meanwhile, Mo can promote the formation of the primary BCC phase. Among
   all alloys, the alloy with Mo (x=2) has the highest fracture tensile
   strength of 1250MPa and the acceptable elongation of 14\%.}},
DOI = {{10.1007/s00339-019-2506-z}},
Article-Number = {{208}},
ISSN = {{0947-8396}},
EISSN = {{1432-0630}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000459384700007}},
}

@article{ ISI:000465611200013,
Author = {Zhang, Mingyang and Peng, Yingbo and Zhang, Wei and Liu, Yong and Wang,
   Li and Hu, Songhao and Hu, Yang},
Title = {{Gradient Distribution of Microstructures and Mechanical Properties in a
   FeCoCrNiMo High-Entropy Alloy during Spark Plasma Sintering}},
Journal = {{METALS}},
Year = {{2019}},
Volume = {{9}},
Number = {{3}},
Month = {{MAR}},
Abstract = {{A novel graded material of a high-entropy alloy (HEA) FeCoCrNiMo was
   fabricated by spark plasma sintering (SPS) processing. After SPS, the
   HEA specimens consisted of a single face-centred cubic (FCC) phase in
   the center, but dual FCC and a tetragonal structure sigma phase near the
   surface. Surprisingly, the sintering pressure was sufficient to
   influence the proportion of phases, and thus the properties of HEA
   samples. The hardness of the specimens sintered under the pressures of
   30, 35, and 40 MPa increased gradually from 210 HV0.2, which is the
   single FCC phase in the center, to the maximum value near the surface as
   a result of the gradual increase in the fraction of the transformed
   sigma phase. The sigma phase, being a complex hard and brittle
   intermetallic particle to manipulate the properties of FCC-type HEA
   systems, which could be influenced by pressure, indicated a major
   possibility for designing gradient HEA materials.}},
DOI = {{10.3390/met9030351}},
Article-Number = {{351}},
ISSN = {{2075-4701}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000465611200013}},
}

@article{ ISI:000458782100047,
Author = {Qin, Gang and Wang, Shu and Chen, Ruirun and Zheng, Huiting and Wang,
   Liang and Su, Yanqing and Guo, Jingjie and Fu, Hengzhi},
Title = {{Improvement of Microstructure and Mechanical Properties of CoCrCuFeNi
   High-Entropy Alloys By V Addition}},
Journal = {{JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE}},
Year = {{2019}},
Volume = {{28}},
Number = {{2, SI}},
Pages = {{1049-1056}},
Month = {{FEB}},
Abstract = {{V element had positive effect in improving the strength of many alloys,
   so it was possible that V had potential to strengthen CoCrCuFeNi
   high-entropy alloys (HEAs) with face-centered cubic (FCC) crystal
   structure, which was relatively weak in strength and had outstanding
   ductility. In this paper, we studied the alloying effect of V on the
   phase evolution, microstructure and the mechanical properties of the
   (CoCrCuFeNi)(100-x)V-x (x=0-16, atomic ratio, hereafter in at.\%) HEAs
   systematically. The results showed that V element had capacity to induce
   sigma phase precipitation. The volume fraction of sigma phase increased
   from 0 to 12\%; the compressive yield stress of (CoCrCuFeNi)(100-x)V-x
   HEAs increased from 300 to 613MPa with V content increasing from 0 to
   16\% (atomic ratio, hereafter in at.\%). However, the compression
   fracture strain decreased from 50 to 28\%. V addition was beneficial in
   improving the strength of CoCrCuFeNi HEA, and the increase in sigma
   phase volume fraction was the key factor for the improvement of the
   (CoCrCuFeNi)(100-x)V-x HEAs in yield stress.}},
DOI = {{10.1007/s11665-018-3837-1}},
ISSN = {{1059-9495}},
EISSN = {{1544-1024}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000458782100047}},
}

@article{ ISI:000460742200023,
Author = {Sun, Yuchen and Ke, Boren and Li, Yulin and Yang, Kai and Yang, Mingqi
   and Ji, Wei and Fu, Zhengyi},
Title = {{Phases, Microstructures and Mechanical Properties of CoCrNiCuZn
   High-Entropy Alloy Prepared by Mechanical Alloying and Spark Plasma
   Sintering}},
Journal = {{ENTROPY}},
Year = {{2019}},
Volume = {{21}},
Number = {{2}},
Month = {{FEB}},
Abstract = {{In the study, an equiatomic CoCrNiCuZn high-entropy alloy (HEA) was
   prepared by mechanical alloying (MA) and the phases, microstructures,
   and thermal properties of the alloy powder were explored. The results
   suggest that a solid solution with body-centered cubic (BCC) phase and a
   crystalline size of 10 nm formed after 60 h of milling. Subsequently,
   the alloy powder was consolidated by spark plasma sintering (SPS) at
   different temperatures (600 degrees C, 700 degrees C, 800 degrees C, and
   900 degrees C). Two kinds of face-centered cubic (FCC) phases co-existed
   in the as-sintered samples. Besides, Vickers hardness and compressive
   strength of the consolidated alloy sintered at 900 degrees C were
   respectively 615 HV and 2121 MPa, indicating excellent mechanical
   properties.}},
DOI = {{10.3390/e21020122}},
Article-Number = {{122}},
ISSN = {{1099-4300}},
ORCID-Numbers = {{Ji, Wei/0000-0002-8574-4863}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000460742200023}},
}

@article{ ISI:000460742200015,
Author = {Zyka, Jiri and Malek, Jaroslav and Vesely, Jaroslav and Lukac, Frantisek
   and Cizek, Jakub and Kuriplach, Jan and Melikhova, Oksana},
Title = {{Microstructure and Room Temperature Mechanical Properties of Different 3
   and 4 Element Medium Entropy Alloys from HfNbTaTiZr System}},
Journal = {{ENTROPY}},
Year = {{2019}},
Volume = {{21}},
Number = {{2}},
Month = {{FEB}},
Abstract = {{Refractory high entropy alloys (HEA) are promising materials for high
   temperature applications. This work presents investigations of the room
   temperature tensile mechanical properties of selected 3 and 4 elements
   medium entropy alloys (MEA) derived from the HfNbTaTiZr system. Tensile
   testing was combined with fractographic and microstructure analysis,
   using scanning electron microscope (SEM), wavelength dispersive
   spectroscope (WDS) and X-Ray powder diffraction (XRD). The 5 element HEA
   alloy HfNbTaTiZr exhibits the best combination of strength and
   elongation while 4 and 3 element MEAs have lower strength. Some of them
   are ductile, some of them brittle, depending on microstructure.
   Simultaneous presence of Ta and Zr in the alloy resulted in a
   significant reduction of ductility caused by reduction of the BCC phase
   content. Precipitation of Ta rich particles on grain boundaries reduces
   further the maximum elongation to failure down to zero values.}},
DOI = {{10.3390/e21020114}},
Article-Number = {{114}},
ISSN = {{1099-4300}},
ResearcherID-Numbers = {{Malek, Jaroslav/E-9265-2013
   Lukac, Frantisek/P-2339-2015
   Cizek, Jakub/F-6163-2010}},
ORCID-Numbers = {{Malek, Jaroslav/0000-0002-8809-662X
   Lukac, Frantisek/0000-0002-7589-9474
   Cizek, Jakub/0000-0001-9961-8545}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000460742200015}},
}

@article{ ISI:000457510300034,
Author = {Rodrigues, Joao Felipe Q. and Costa, Diego and Contieri, Rodrigo J. and
   Osorio, Wislei R. and Bortolozo, Ausdinir D.},
Title = {{Microstructural characterization and mechanical behavior of an
   AgA1NbTiZn complex composition alloy produced using powder metallurgy
   (P/M)}},
Journal = {{MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING}},
Year = {{2019}},
Volume = {{744}},
Pages = {{305-315}},
Month = {{JAN 28}},
Abstract = {{This investigation is focused on a complex composition AgAITiNbZn alloy
   manufactured by using the powder metallurgy (P/M) route. Four
   distinctive heat-treating temperatures are used (i.e. 580, 750, 850,
   1000 degrees C). X-ray diffraction (XRD) and scanning electron
   microscopy (SEM) are used in order to characterize the resulting
   microstructural array obtained. Although, theoretical thermodynamic
   parameters from literature are used, a solid solution is not
   constituted. It is found that the TiAl intermetallics are neighboring
   the dispersed Nb particles. Besides, they are also embedded into an AgZn
   matrix. The examined AgA1NbTiZn alloy constitutes a complex
   multicomponent alloy (CCA). Its compressive strength is increased up to
   a heat-treating at 750 degrees C and decreased when at 850 and 1000
   degrees C is carried out. A controlling of the second phase permits to
   preprogram the resulting mechanical strength of the alloy/composite
   examined.}},
DOI = {{10.1016/j.msea.2018.12.020}},
ISSN = {{0921-5093}},
EISSN = {{1873-4936}},
ResearcherID-Numbers = {{Osorio, Wislei R*/E-2585-2013
   CONTIERI, RODRIGO/G-7492-2014
   Rodrigues, Joao Felipe Q/H-3809-2016}},
ORCID-Numbers = {{CONTIERI, RODRIGO/0000-0003-3883-2059
   }},
Times-Cited = {{0}},
Unique-ID = {{ISI:000457510300034}},
}

@article{ ISI:000457979600001,
Author = {El-Hadad, Shimaa and Ibrahim, Mervat and Mourad, Mohamed},
Title = {{Effect of Heat Treatment and Titanium Addition on the Microstructure and
   Mechanical Properties of Cast Fe31Mn28 Ni15Al24.5Tix High-Entropy Alloys}},
Journal = {{ADVANCES IN MATERIALS SCIENCE AND ENGINEERING}},
Year = {{2019}},
Abstract = {{High-entropy alloys (HEAs) are multiprincipal element alloys with
   controllable properties. Studying the mechanical properties of these
   alloys and relating them to their microstructures is of interest. In the
   current investigation, Fe31Mn28 Ni15Al24.5Tix high-entropy alloys with
   Ti content (0-3wt.\%) were prepared by casting in an induction furnace.
   Different heat treatments were applied, and the microstructure and
   hardness of the cast samples were studied. It was observed that addition
   of up to 3.0 wt.\% Ti significantly increases the hardness of the alloy
   from 300 to 500 (Hv) by the combined effect of solid solution
   strengthening and via decreasing lamellar spacing. Heat treatment at 900
   degrees C for 10h enhanced the hardness at lower Ti percentages (0.0-0.8
   wt.\%) by decreasing the lamellar spacing, while no change was observed
   at higher Ti content. It was also observed that extending the treatment
   time to 20h affected negatively the hardness of the alloy. Concluding,
   HEAs can achieve high hardness using low-cost principle elements with
   minor alloying additives compared to the other traditional alloys.}},
DOI = {{10.1155/2019/2157592}},
Article-Number = {{2157592}},
ISSN = {{1687-8434}},
EISSN = {{1687-8442}},
ORCID-Numbers = {{El-Hadad, Shimaa/0000-0001-8751-6330
   ibrahim, mervat/0000-0001-5696-9097}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000457979600001}},
}

@article{ ISI:000458410800007,
Author = {Emamifar, Armin and Sadeghi, Behzad and Cavaliere, Pasquale and Ziaei,
   Hosein},
Title = {{Microstructural evolution and mechanical properties of AlCrFeNiCoC high
   entropy alloy produced via spark plasma sintering}},
Journal = {{POWDER METALLURGY}},
Year = {{2019}},
Volume = {{62}},
Number = {{1}},
Pages = {{61-70}},
Month = {{JAN 1}},
Abstract = {{AlCrFeCoC high entropy alloy was synthesised through mechanical alloying
   and spark plasma sintering. The milling time had a strong influence on
   the particles shape and structure and consequently on microstructural
   and mechanical evolution of the material after sintering. The material's
   microstructure after spark plasma sintering contained FCC and BCC phases
   as well as ordered BCC and C23C6 carbide. The material's strength
   increased with increasing the milling time because of the finer
   microstructure and phases formation evolution.}},
DOI = {{10.1080/00325899.2019.1576389}},
ISSN = {{0032-5899}},
EISSN = {{1743-2901}},
ORCID-Numbers = {{sadeghi, behzad/0000-0001-6585-8356}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000458410800007}},
}

@article{ ISI:000457815200016,
Author = {Hou Lili and Yao Yuhong and Liang Xiaoyu and Chen Jian and Liu Jiangnan},
Title = {{Microstructure and Mechanical Properties of AlxFeCoNiB0.1 High Entropy
   Alloy}},
Journal = {{RARE METAL MATERIALS AND ENGINEERING}},
Year = {{2019}},
Volume = {{48}},
Number = {{1}},
Pages = {{111-115}},
Month = {{JAN}},
Abstract = {{AlxFeCoNiB0.1 (x=0.4, 0.5, 0.8, 1.2, 1.6, at\%) high entropy alloys were
   prepared by vacuum arc melting. The microstructure and mechanical
   properties of AlxFeCoNiB0.1 were investigated. The results show that
   with the increase of Al content, the cast dendrites of the alloy changes
   from fcc phase to B-2(AlNi)/bcc phase. When x=0.4 and 0.5, the
   microstructures of the alloys consist of dendrite fcc phase and the
   interdendritic B-2 phase and (Fe, Co)(2)B; when x=0.8, the dendrites are
   composed of B-2 phase, and the interdendrites are composed of fcc phase
   and (Fe, Co)(2)B; when x=1.2, the interdendritic structures consist of
   eutectic fcc+(Fe, Co)(2)B, and the nanoscale granules are the bcc phase;
   when x=1.6, the eutectic structures disappear. With the increase of Al
   content, the compressive strength increases first and then decreases.
   When the content of Al is 0.8 at\%, it reaches its peak value of 2243
   MPa. An appropriate amount of Al can improve the comprehensive
   mechanical properties of high entropy alloy.}},
ISSN = {{1002-185X}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000457815200016}},
}

@article{ ISI:000462031700005,
Author = {Marych, M. V. and Bagliuk, G. A. and Mamonova, A. A. and Gripachevskii,
   A. N.},
Title = {{The Influence of Synthesis Conditions on the Phase Composition,
   Structure, and Properties of the High-Entropy Ti-Cr-Fe-Ni-Cu Alloy}},
Journal = {{POWDER METALLURGY AND METAL CERAMICS}},
Year = {{2019}},
Volume = {{57}},
Number = {{9-10}},
Pages = {{533-541}},
Month = {{JAN}},
Abstract = {{The influence of production conditions on the structure, phase
   composition, and properties of the high-entropy Ti-Cr-Fe-Ni-Cu alloy has
   been studied. The starting materials were Cr, Fe, Ni, Cu, and Ti powders
   in the equiatomic ratio. To prepare the starting charge, the powders
   were mixed and mechanically alloyed in a planetary-ball mill. The
   compacted billets were hot-forged and then annealed at 1000, 1100, and
   1200 degrees C. The phase composition of the hot-forged and annealed
   alloys is mainly represented by FCC structure. There are few peaks of
   BCC structures, intermetallides, and titanium. Mechanical synthesis
   leads to significant distortion of crystalline lattices of all elements
   in the powder mixture, which is evidenced by substantial broadening of
   interference lines. The hardness and lattice distortion of the
   hot-forged samples decrease after annealing with increasing temperature.
   The materials made of the starting mixtures subjected to preliminary
   mechanical alloying show higher hardness. The hardness increases with
   grinding time for both unannealed samples and those annealed at all
   temperatures concerned.}},
DOI = {{10.1007/s11106-019-00012-z}},
ISSN = {{1068-1302}},
EISSN = {{1573-9066}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000462031700005}},
}

@article{ ISI:000458411800001,
Author = {Ni, Xuyao and Dai, Ting and Lu, Tao and Pan, Jiayi and Li, Miao and Dai,
   Jianwen},
Title = {{Microstructure and properties of CrMnFeCoNi high-entropy alloy prepared
   by mechanical alloying and spark plasma sintering}},
Journal = {{POWDER METALLURGY}},
Year = {{2019}},
Volume = {{62}},
Number = {{1}},
Pages = {{38-43}},
Month = {{JAN 1}},
Abstract = {{The equiatomic ratio CrMnFeCoNi high entropy alloy (HEA) was prepared by
   mechanical alloying (MA) and spark plasma sintering. This paper reports
   the behaviour of MA, the phase formation, microstructure and mechanical
   properties of CrMnFeCoNi HEA. With the increase of milling time, solid
   solution with single FCC phase was gradually formed. The single FCC
   phase remained as matrix after SPS at 1373 K and 50 MPa.
   Ultrafine-grained microstructure and good mechanical properties were
   obtained: At room temperature, the as-sintered bulks exhibit an
   excellent combination of high compressive strength (2390 MPa) and high
   fracture strain (47\%).}},
DOI = {{10.1080/00325899.2018.1554834}},
ISSN = {{0032-5899}},
EISSN = {{1743-2901}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000458411800001}},
}

@article{ ISI:000455266500057,
Author = {Pi, Jinhong and Yu, Changfu and Sun, Chao and Du, Hailong and Fan,
   Yinlong and Zhang, BaoSen and Yang, Shaofeng},
Title = {{Effect of Cold Deformation and Heat Treatment on the Microstructure and
   Mechanical Behavior of High Entropy Alloy CuCrFeNi2Al0.5}},
Journal = {{JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE}},
Year = {{2019}},
Volume = {{28}},
Number = {{1}},
Pages = {{586-592}},
Month = {{JAN}},
Abstract = {{CuCrFeNi2Al0.5, a high entropy alloy (HEA) with a single FCC phase, was
   deformed at room temperature and then heat treated. The small particles
   precipitated from the deformed FCC solid solution matrix after heating
   at 700 degrees C, softening the solid solution matrix. This outcome
   confirms that the microstructure of HEAs can be controlled by heat
   treatment in addition to controlling the chemical composition and the
   rate of cooling from liquid alloys. The hardness of the samples
   increased due to precipitation hardening, and the specimen heated at 700
   degrees C with 10\% predeformation had the highest hardness. As the
   predeformation increases, the precipitates tend to interweave in the
   network morphology. Meanwhile, grains in all specimens became more
   severely coarse after heat treatment at 1100 degrees C. Predeformation
   followed by annealing can obviously slow down the creep rate, indicating
   that annealing at an appropriate temperature can improve the mechanical
   properties of deformed HEA.}},
DOI = {{10.1007/s11665-018-3822-8}},
ISSN = {{1059-9495}},
EISSN = {{1544-1024}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000455266500057}},
}

@article{ ISI:000459740300015,
Author = {Tseng, Ko-Kai and Juan, Chien-Chang and Tso, Shuen and Chen, Hsuan-Chu
   and Tsai, Che-Wei and Yeh, Jien-Wei},
Title = {{Effects of Mo, Nb, Ta, Ti, and Zr on Mechanical Properties of Equiatomic
   Hf-Mo-Nb-Ta-Ti-Zr Alloys}},
Journal = {{ENTROPY}},
Year = {{2019}},
Volume = {{21}},
Number = {{1}},
Month = {{JAN}},
Abstract = {{Nowadays refractory high-entropy alloys (RHEAs) are regarded as great
   candidates for the replacement of superalloys at high temperature. To
   design a RHEA, one must understand the pros and cons of every refractory
   element. However, the elemental effect on mechanical properties remains
   unclear. In this study, the subtraction method was applied on equiatomic
   HfMoNbTaTiZr alloys to discover the role of each element, and, thus,
   HfMoNbTaTiZr, HfNbTaTiZr, HfMoTaTiZr, HfMoNbTiZr, HfMoNbTaZr, and
   HfMoNbTaTi were fabricated and analyzed. The microstructure and
   mechanical properties of each alloy at the as-cast state were examined.
   The solid solution phase formation rule and the solution strengthening
   effect are also discussed. Finally, the mechanism of how Mo, Nb, Ta, Ti,
   and Zr affect the HfMoNbTaTiZr alloys was established after comparing
   the properties of these alloys.}},
DOI = {{10.3390/e21010015}},
Article-Number = {{15}},
ISSN = {{1099-4300}},
ResearcherID-Numbers = {{Tsai, Che-Wei/S-2698-2019}},
ORCID-Numbers = {{Tsai, Che-Wei/0000-0003-3072-7916}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000459740300015}},
}

@article{ ISI:000457786200016,
Author = {Xu, Juan and Wang, Shouren and Shang, Caiyun and Huang, Shifeng and
   Wang, Yan},
Title = {{Microstructure and Properties of CoCrFeNi(WC) High-Entropy Alloy
   Coatings Prepared Using Mechanical Alloying and Hot Pressing Sintering}},
Journal = {{COATINGS}},
Year = {{2019}},
Volume = {{9}},
Number = {{1}},
Month = {{JAN}},
Abstract = {{The CoCrFeNi high-entropy alloy coatings (HEACs) with different weight
   ratios (10 and 30 wt.\%) of WC additions have been prepared using
   mechanical alloying and a vacuum hot pressing sintering technique on a
   Q235 steel substrate. The microstructures, microhardness, wear
   resistance, and corrosion resistance of HEACs were studied. The
   CoCrFeNi(WC) powders were obtained by mixing the CoCrFeNi HEA powders
   and WC particles. The sintered products of both HEACs with high relative
   density contained one solid solution phase with face-centered cubic
   structure, WC, and unknown precipitate phases. The transition boundary
   had a good metallurgical bonding with the coating and substrate. The
   average microhardness values of CoCrFeNi HEACs with 10 and 30 wt.\% WC
   additions reached 475 and 531 HV respectively, which were far higher
   than that of the substrate (160 HV). Moreover, both coatings exhibited
   better wear resistance than the substrate under the same wear
   conditions. The 30 wt.\% WC HEAC displayed the lower friction
   coefficient, and the shallower wear groove depth. The grain refinement
   strengthening and second-phase particle strengthening could be
   beneficial to the enhanced hardness and wear resistance of coatings with
   WC additions. The corrosion behavior of the tested samples in the 3.5
   wt.\% NaCl solution were investigated using electrochemical polarization
   measurements. The CoCrFeNi(WC) coatings all revealed the improved
   corrosion resistance. Especially, a 10 wt.\% WC addition remarkably
   enhanced the comprehensive corrosion resistance and easy passivation of
   CoCrFeNi HEAC.}},
DOI = {{10.3390/coatings9010016}},
Article-Number = {{16}},
ISSN = {{2079-6412}},
ORCID-Numbers = {{Wang, Yan/0000-0002-4482-6387}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000457786200016}},
}

@article{ ISI:000471199800006,
Author = {Yang, Shaofeng and Zhang, Yan and Yan, Xing and Zhou, Hang},
Title = {{Enhancement of Mechanical Properties and Corrosion Resistance of
   Ultra-Fine Grain Al0.4FeCrCo1.5NiTi0.3 High-Entropy Alloy by MA and SPS
   Technologies}},
Journal = {{MATERIALS SCIENCE-MEDZIAGOTYRA}},
Year = {{2019}},
Volume = {{25}},
Number = {{3}},
Pages = {{259-264}},
Abstract = {{Al0.4FeCrCo1.5NiTi0.3 high-entropy alloy (HEA) was prepared by
   mechanical alloying (MA) and spark plasma sintering (SPS), which were
   evaluated in this study by XRD and TEM. After SPS, the bulk alloy
   exhibited a structure with a dominant fcc phase, a minor volume fraction
   of bcc phase, and the formation of TiAl3 intermetallic compound.
   Deformation twinning was observed in the fcc phase in the bulk HEA. The
   latter had a compressive strength, strain and Vickers hardness of 2225
   +/- 15 MPa, 17.52 +/- 0.50 \% and 515 +/- 16 HV, respectively. The
   corrosion resistance studies indicated that Al0.4FeCrCo1.5NiTi0.3 with
   ultra-fine grained micro-structure was easier to passivate and possessed
   excellent corrosion resistance.}},
DOI = {{10.5755/j01.ms.25.3.19452}},
ISSN = {{1392-1320}},
EISSN = {{2029-7289}},
Times-Cited = {{0}},
Unique-ID = {{ISI:000471199800006}},
}