Compositionally complex coherent precipitation-strengthened high-entropy alloys:a critical review  

作　　者：Jin-Xiong Hou Bo-Xuan Cao Bo Xiao Zeng-Bao Jiao Tao Yang 

机构地区：[1]Department of Materials Science and Engineering,City University of Hong Kong,Hong Kong 999077,China [2]Hong Kong Institute for Advanced Study,City University of Hong Kong,Hong Kong 999077,China [3]Department of Mechanical Engineering.The Hong Kong Polytechnic University,Hong Kong 999077,China

出　　处：《Rare Metals》2022年第6期2002-2015,共14页稀有金属（英文版）

基　　金：financially supported by the Hong Kong Research Grant Council,University Grants Committee (RGC) (Nos.21205621 and 9610498);the CityU Shenzhen Research Institute (SRI) (No.2020A1515110647);the National Natural Science Foundation of China (No.52101151)

摘　　要：The coherent precipitation-strengthened high-entropy alloys(CPS-HEAs)as a new type of structural materials are expected to possess many unique mechanical properties,such as the outstanding strength-ductility com-bination at cryogenic and room temperatures.Apart from this,most of their strengths can even be well retained at elevated temperatures.The compositionally complex matrix and nanoprecipitation phases,as well as the coherent interfaces between them,can potentially bring novel merits of these CPS-HEAs,including sluggish dif-fusion,excellent thermal stability,and controlled magnetic properties.Note that the ductile coherent L1_(2)-nanoparticles can improve the strength of alloys without too much reduction of plasticity,while the coherent B2-nanoparticles strengthened HEAs display completely brittle failure upon tensile test at room temperature.An overview of the alloy design,microstructure evolution,oxidation resistance,mechanical and magnetic properties of CPS-HEAs are briefly discussed here.The advantages of multicomponent coherent precipitation-strengthened HEAs as well as the limitations in this field are also summarized.In addition,this review also points out the future research directions and prospects.

关 键 词：High-entropy alloys Coherent precipitation strengthening Multicomponent intermetallic Mechanical properties Magnetic properties 

分 类 号：TG139[一般工业技术—材料科学与工程]