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Entropy 2019, 21(3), 239; https://doi.org/10.3390/e21030239

High-Pressure Induced Phase Transitions in High-Entropy Alloys: A Review

1
Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
2
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
3
China Academy of Engineering Physics, Mianyang 621900, China
4
Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
*
Author to whom correspondence should be addressed.
Received: 24 January 2019 / Revised: 22 February 2019 / Accepted: 26 February 2019 / Published: 2 March 2019
(This article belongs to the Special Issue New Advances in High-Entropy Alloys)
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Abstract

High-entropy alloys (HEAs) as a new class of alloy have been at the cutting edge of advanced metallic materials research in the last decade. With unique chemical and topological structures at the atomic level, HEAs own a combination of extraordinary properties and show potential in widespread applications. However, their phase stability/transition, which is of great scientific and technical importance for materials, has been mainly explored by varying temperature. Recently, pressure as another fundamental and powerful parameter has been introduced to the experimental study of HEAs. Many interesting reversible/irreversible phase transitions that were not expected or otherwise invisible before have been observed by applying high pressure. These recent findings bring new insight into the stability of HEAs, deepens our understanding of HEAs, and open up new avenues towards developing new HEAs. In this paper, we review recent results in various HEAs obtained using in situ static high-pressure synchrotron radiation x-ray techniques and provide some perspectives for future research. View Full-Text
Keywords: high pressure; polymorphic transition; high-entropy alloy high pressure; polymorphic transition; high-entropy alloy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Zhang, F.; Lou, H.; Cheng, B.; Zeng, Z.; Zeng, Q. High-Pressure Induced Phase Transitions in High-Entropy Alloys: A Review. Entropy 2019, 21, 239.

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