摘要
In recent years,high-entropy alloys(HEAs)have become a research hotspot in materials community,and great progress has been made in exploring various high-performance HEAs.As a special class,the light-weight refractory high-entropy alloys(RHEAs)own both excellent high-temperature comprehensive properties and low density and have accordingly attracted more and more attention.In this paper,we presented a comprehensive review of the recent progress and status in light-weight RHEAs.Based on an exhausting search of the literature reports,one strategy in terms of phase numbers after preparation was first proposed to classify the light-weight RHEAs into three categories.Then,the status on the fundamental thermodynamic and thermophysical data/databases,computational approaches for alloy designing,and preparation/fabrication techniques of light-weight RHEAs was introduced one after another.After that,the progress on mechanical properties and oxidation/corrosion/wear behaviors of light-weight RHEAs at room and high temperatures was summarized.Finally,the conclusions of this review were drawn.By pointing out the shortcomings of the current research,the follow-up development directions in the field of light-weight RHEAs were also given.
基金
Q.Li acknowledges National Natural Science Foundation of China(No.U2102212)
L.Zhang acknowledges the Natural Science Foundation of Hunan Province for Distinguished Young Scholars(No.2021JJ10062)
S.Chen acknowledges the Fundamental Research Funds for the Central Universities of Central South University(No.2019zzts486)
S.Yang acknowledges the financial support from the Fundamental Research Funds for the Central Universities of Central South University(No.2019zzts050)
Postgraduate Scientific Research Innovation Project of Hunan Province(No.CX20190106)
Q.Luo acknowledges the Shanghai Rising-Star Program(No.21QA1403200)
W.Xie.acknowledges the financial support of National Science Foundation of China(No.52003150)
Eastern Young Scholar at Shanghai Institutions of Higher Learning(No.QD2019006).
