Effect of Co addition on crystal structure and mechanical properties of Ti0.5CrFeNiAlCo high entropy alloy

A high entropy alloy of Ti0.5CrFeNiAlCo can form two BCC crystal structures, one is with larger lattice parameter, and another with smaller one. In this paper, more Co was added in the Ti0.5CrFeNiAlCo alloy to detect the crystal structure and the properties changes. It is found that, with the increase of Co addition, the smaller BCC prefers to transit to FCC firstly, and the compressive strength deceased slightly.