Nature of CoCrFeMnNi/Fe and CoCrFeMnNi/Al Solid/Solid Interface

作     者：Zhongtao Li Weidong Zhang Zhenggang Wu Zhongtao Li;Weidong Zhang;Zhenggang Wu

作者机构：College of Materials Science and EngineeringHunan UniversityChangsha 410082China State Key Laboratory of Advanced Design and Manufacturing for Vehicle BodyHunan UniversityChangsha 410082China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2021年第34卷第11期

页      面：1483-1491页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0827[工学-核科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51901077) the Science and Technology Innovation Platform and Talent Plan of Hunan Province(Grant No.2019RS1020) the open Foundation of State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha,China(No.71865003) 

主　　题：High-entropy alloy Microstructure Metallurgical bonding Interface 

摘      要：To shed light into the application potential of high-entropy alloys asinterlayermaterials for Al-steel solid-state joining,we investigated the nature of the CoCrFeMnNi/Fe and CoCrFeMnNi/Al solid/solid interfaces,focusing on the bonding behavior and phase *** metallurgical bonding without the formation of hard and brittle IMC can be achieved for CoCrFeMnNi/Fe solid/solid *** contrast to the formation of Al5 Fe2 phase at the Fe/Al interface,Al13Fe4-type IMC,in which the Fe site is co-occupied equally by Co,Cr,Fe,Mn and Ni,dominates the CoCrFeMnNi/Al *** the formation of IMC at the CoCrFeMnNi/Al interface is not avoidable,the thickness and hardness of the Al13(CoCrFeMnNi)4 phase formed at the CoCrFeMnNi/Al interface are significantly lower than the Al5 Fe2 phase formed at the Fe/Al *** activation energies for the interdiffusion of Fe/Al and CoCrFeMnNi/Al static diffusion couple are 341.6 kJ/mol and 329.5 kJ/mol,*** this similarity,under identical static annealing condition,the interdiffusion coe fficient of the CoCrFeMnNi/Al diffusion couple is significantly lower than that of the Fe/Al diffusion *** is thus mainly a result of the reduced atomic mobility/diffusivity caused by the compositional complexity in CoCrFeMnNi high-entropy alloy.