多主元高熵合金的凝固组织及晶粒细化进展  

Progress in Solidification Microstructures and Grain Refinement of Multi-principal-element High-entropy Alloys

作　　者：应泽辰 高妞 谢伦杰 程奎 马县能 杨力[1] 樊自田[1] 刘鑫旺[1] Ying Zechen;Gao Niu;Xie Lunjie;Cheng Kui;Ma Xianneng;Yang Li;Fan Zitian;Liu Xinwang(State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology)

机构地区：[1]华中科技大学材料科学与工程学院材料成形与模具技术国家重点实验室,武汉430074

出　　处：《特种铸造及有色合金》2021年第8期944-951,共8页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51971099)。

摘　　要：多主元高熵合金将成分设计范围延伸到多元相图纵深区域,其没有明确的溶剂和溶质区别,因此此类合金具有更加复杂的成分、独特的原子结构和高混合熵,表现出很多不同于传统固溶体的独特性能。这些独特特征也决定了多主元高熵合金的凝固行为区别于传统合金,尤其是溶质再分配、凝固组织形成和晶粒细化方法等方面。从多主元高熵合金的成分角度出发,主要综述了典型多主元高熵合金体系的凝固组织特征、成分偏析和晶粒细化方法,并对多主元高熵合金凝固行为和组织调控的研究进行了展望。Multi-principal-element high-entropy alloy extends the composition design to the deep regions of the multicomponent phase diagram,which has no clear difference between solvent and solute.Therefore,these alloys have a more complex composition,unique atom structure and high mixing entropy and manifest lots of distinctive properties,determining that the solidification behavior of the multi-principal element high entropy alloy is different from that of the traditional alloy,especially in aspects of solute redistribution,solidification microstructure formation and grain refinement methods.Based on the complex compositions of multi-principal-element high entropy alloys,the solidification structure,composition segregation and methods of grain refinement of some typical systems were mainly reviewed,and the future research on solidification behaviors and microstructure control was prospected.

关 键 词：多主元高熵合金 凝固组织 成分偏析 晶粒细化 

分 类 号：TG146.1[一般工业技术—材料科学与工程]