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Fundamental understanding of mechanical behavior of high-entropy alloys at low temperatures: A review

Published online by Cambridge University Press:  17 August 2018

Zongyang Lyu ,
Xuesong Fan ,
Chanho Lee ,
Shao-Yu Wang ,
Rui Feng  and
Peter K. Liaw
Zongyang Lyu
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA
Xuesong Fan
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA
Chanho Lee
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA
Shao-Yu Wang
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA
Rui Feng
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA
Peter K. Liaw*
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA
*
a)Address all correspondence to this author. e-mail: pliaw@utk.edu
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Abstract

The basic principle of high-entropy alloys (HEAs) is that high mixing entropies of solid-solution phases enhance the phase stability, which renders us a new strategy on alloy design. The current research of HEAs mostly emphasizes mechanical behavior at room and higher temperatures. Relatively fewer papers are focused on low-temperature behaviors, below room temperature. However, based on the published papers, we can find that the low-temperature properties of HEAs are generally excellent. The great potential for cryogenic applications could be expected on HEAs. In this article, we summarized and discussed the mechanical behaviors and deformation mechanisms, as well as stacking-fault energies, of HEAs at low temperatures. The comparison of low-temperature properties of HEAs and conventional alloys will be provided. Future research directions will be suggested at the end.

Keywords

alloystress/strain relationshiptoughness
Type
Invited Review
Information
Journal of Materials Research , Volume 33 , Issue 19: Focus Issue: Fundamental Understanding and Applications of High-Entropy Alloys , 14 October 2018 , pp. 2998 - 3010
Copyright
Copyright © Materials Research Society 2018 

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Footnotes

b)

This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/editor-manuscripts/.

This section of Journal of Materials Research is reserved for papers that are reviews of literature in a given area.

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