Microstructure evolution and composition redistribution of FeCoNiCrMn high entropy alloy under extreme plastic deformation

Materials Research Letters

Wenya Li¹  Zhijun Wang¹  Yongyun Zhang²  Shuo Yin³  Ningsong Fan³  Pengfei Yu³  Rocco Lupoi³ 

[1] Northwestern Polytechnical University;The Hong Kong Polytechnic University;Trinity College Dublin, The University of Dublin;

关键词: high entropy alloy;    ultra-high strain rate;    severe plastic deformation;    cold spray;   

DOI  :  10.1080/21663831.2021.2023678

来源: DOAJ

【 摘 要 】

The microstructure and composition evolution of FeCoNiCrMn high entropy alloy during extreme deformation with a strain rate of 108–109 s−1 induced by cold spray technology was investigated. In the region experiencing extremely large strain and high strain rate deformation, ultrafine nanograins with an average size of smaller than 100 nm were formed due to the occurrence of dynamic recrystallization. Additionally, the rapid redistribution of segregated Mn and Ni elements in extremely deformed FeCoNiCrMn was found for the first time. The reason for this phenomenon is the increased grain boundary area and dislocation density caused by extreme plastic deformation.

【 授权许可】

Unknown