基于参数计算设计一种新型双相高强韧高熵合金  

Design of a Novel Dual-phase High Strength-ductile HEA Based on Parameter Calculation

作　　者：郑伟杰 钟雨江 王明梓 张震 郭威 吕书林[1,2] 吴树森[1,2] Zheng Wejie;Zhong Yujiang;Wang Mingzi;Zhang Zhen;Guo Wei;LüShulin;Wu Shusen(State Key Laboratory of Material Processing and Die&Mould Technology,Huazhong University of Science and Technology;School of Materials Science and Engineering,Huazhong University of Science and Technology;State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University;Research Institute of Huazhong University of Science and Technology in Shenzhen)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室 [2]华中科技大学材料科学与工程学院 [3]湖南大学汽车车身设计及制造国家重点实验室 [4]深圳华中科技大学研究院

出　　处：《特种铸造及有色合金》2022年第8期1005-1011,共7页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52101138);湖北省自然科学基金资助项目(2020CFB259);新金属材料国家重点实验室开放基金资助项目(2020-Z01);金属材料强度国家重点实验室开放基金资助项目(20202205);广东省基础与应用基础研究基金资助项目(2020A1515110531);汽车车身设计及制造国家重点实验室开放基金资助项目(32015001)。

摘　　要：基于高熵合金固溶体相形成设计参数,在Co-Cr-Fe-Ni合金体系基础上,通过添加轻质及难熔元素优化体系设计参数,获得了一种具有双相(BCC+FCC)结构,且具有较好高温强度的新型轻质高强韧高熵合金。研究发现,最优合金成分CoCrFeNiAl_(2)CuV_(0.8)具有(FCC+AlCu)的双相结构,且在室温及高温环境下拥有良好的压缩性能,但其塑性变形能力有待进一步改善。试验结果与参数设计的预期结果基本相符,证明了基于参数计算进行高熵合金成分设计的可行性。Based on the solid solution phase formation design parameters of high entropy alloy,Co-Cr-Fe-Ni alloy system was optimized by adding light and refractory elements,and a new type of light-weight,high strength-ductile HEAs with dual phase(BCC+FCC) structure and desirable high temperature strength was obtained.The results indicate that the optimal CoCrFeNiAl_(2)CuV_(0.8)Valloy possesses the expected dual-phase structure,and maintains excellent compression performance at room temperature and even high temperature,while the plastic deformation ability needs to be further improved.The experimental results are basically consistent with the expectations from the parameter design,verifying the feasibility of composition design for HEAs based on parameter calculation.

关 键 词：高熵合金 固溶体设计参数 双相结构 轻质高强韧 

分 类 号：TG249.9[金属学及工艺—铸造] TP311[自动化与计算机技术—计算机软件与理论]