高性能高熵合金的基础研究进展  

review on fundamental of high entropy alloys with promising high-temperature properties

作　　者：李国超 魏然[2] 文新理[2] LI Guochao;WEI Ran;WEN Xinli(Beijing Beiye Functional Materials Corporation,Beijing 100192)

机构地区：[1]北京北冶功能材料有限公司材料研究所,北京100192 [2]北京北冶功能材料有限公司,北京100192

出　　处：《金属材料研究》2021年第1期1-12,共12页Research on Metallic Materials

摘　　要：高熵合金(High entropy alloys,HEAs)通常有五种或以上主元素,具有四种核心效应:高熵,缓慢扩散,严重的晶格畸变以及鸡尾酒效应,这些特性使得高熵合金具有很多独特的性能。某些高熵合金具有良好的高温应用前景,有望取代镍基局温合金作为下一代高温材料,例如高摘高温合金(High entropy superalloys,HESAs)和难熔高熵合金。高熵高温合金的显微组织与镍基高温合金类似,也由γ相和γ'相组成。难熔高熵合金包含具有高熔点的难熔合金。本文中综述和讨论了一些高熵高温合金和高熵难容合金的组织、密度、室温力学性能、高温强度、蠕变性能和抗氧化性,并提出了一些未来的研究方向,其中的重点是开发高性能高温材料。High entropy alloys(HEAs)have five or more principal elements with four core effects:high entropy,sluggish diffusion,severe lattice distortion,and cocktail effects.These effects lead to some distinct properties of HEAs.Some HEAs are promising for high temperature applications and have the potential to replace Ni-base superalloys as the next generation high-temperature materials,such as high entropy superalloys(HESAs)and refractory HEAs.The microstructures of HESAs consisting of γ and γ' phases are similar to that of Ni-base superalloys.Refractory HEAs contain refractory elements with high melting temperatures.Thus,a number of aspects of HESAs and refractory HEAs are reviewed and discussed in the present paper,including microstructure,density,room-temperature mechanical properties,high temperature strength,creep behavior,and oxidation resistance.Furthermore,a number of future research topics are suggested,emphasizing on developing high-performance high-temperature materials.

关 键 词：高熵高温合金 难熔高熵合金 高温强度 抗氧化性 密度 

分 类 号：TG1[金属学及工艺—金属学]