Characteristics of the Cold-Rolled Multi-Phase Cr30Fe30Ni15Co10Cu10Ti5 High-Entropy Alloy

Microstructure and mechanical behavior of a non-equiatomic Cr30Fe30Ni15Co10Cu10Ti5 high-entropy alloy were investigated during cold rolling. The alloy was cast by vacuum arc melting and after homogenization, it was hot rolled and solution annealed. The as-cast microstructure consisted of two face-centered cubic (FCC1: Ni-rich, FCC2: Cu-rich) and a hard Cr-rich σ phases. The dendritic structure disappeared after solution annealing and the σ phase partially transformed to a softer phase with a body-centered cubic (BCC) structure. The addressed thermomechanical process was found to result in favorable microstructural characteristics, which provided the possibility of subsequent heavy cold rolling up to 85