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L12-strengthened high-entropy alloys for advanced structural applications

Published online by Cambridge University Press:  22 June 2018

Tao Yang ,
Yilu Zhao ,
Weihong Liu ,
Jijung Kai  and
Chaintsuan Liu
Tao Yang
Affiliation:
Center for Advanced Structural Materials, College of Science and Engineering, City University of Hong Kong, Hong Kong, China
Yilu Zhao
Affiliation:
Center for Advanced Structural Materials, College of Science and Engineering, City University of Hong Kong, Hong Kong, China
Weihong Liu*
Affiliation:
Center for Advanced Structural Materials, College of Science and Engineering, City University of Hong Kong, Hong Kong, China
Jijung Kai
Affiliation:
Center for Advanced Structural Materials, College of Science and Engineering, City University of Hong Kong, Hong Kong, China
Chaintsuan Liu*
Affiliation:
Center for Advanced Structural Materials, College of Science and Engineering, City University of Hong Kong, Hong Kong, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Advanced alloys with both high strength and ductility are highly desirable for a wide range of engineering applications. Conventional alloy design strategies based on the single-principle element are approaching their limits in further optimization of their performances. Precipitation-hardened high-entropy alloys (HEAs), especially those strengthened by coherent L12-nanoparticles, have received considerable interest in recent years, enabling a new space for the development of advanced structural materials with superior mechanical properties. In this review, we highlight recent important advances of the newly developed L12-strengthened HEAs, including the aspects of computation-aided alloy design, unique properties, atomic-level characterization, phase evolution, and stability. In particular, we focus our attention on elucidating fundamental scientific issues involving the alloying effects, precipitation behaviors, mechanical performances, and the corresponding deformation mechanisms, all of which provide a comprehensive metallurgical understanding and guidance for the design of this new class of HEAs. Finally, future research directions and prospects are also critically assessed.

Keywords

alloynanostructurephase transformation
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. 2983 - 2997
Copyright
Copyright © Materials Research Society 2018 

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Footnotes

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

References

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