On the microstructure and mechanical properties of FeCoCrCuNi high entropy alloy during hot compression

This study aims to find the optimized parameters such as temperature and strain rate during hot compression of FeCoCrCuNi high entropy alloy. For this purpose, hot compression tests were carried out at temperatures ranging 800-1000 degrees C and strain rates of 0.001-0.1 s(-1). Results indicated that flow stress increases to a peak and then decreases. Also, the magnitude decreases with increasing the deformation temperature or decreasing strain rates. Moreover, accurate analysis of the dendritic structures showed that some of the dendrites were broken during hot compression and partial dynamic recrystallization occurred. To predict high temperature behavior, a constitutive equation was developed using the Zener-Hollomon parameter with a good consistency with experimental results. (C) 2021 The Author(s). Published by Elsevier B.V.

Automated summary

This study investigated the behavior of FeCoCrCuNi high entropy alloy under different temperatures and strain rates through hot compression experiments. The results showed that the flow stress varied with temperature and strain rate, and changes in dendritic structures and partial dynamic recrystallization were observed. A constitutive equation was developed to accurately predict high temperature behavior.