Achieving dual-phase structure and improved mechanical properties in AlCoCrFeTi0.5 high-entropy alloys by addition of Ni

High-entropy alloys (HEAs) have attracted increasing attention as structural materials due to their excellent mechanical properties; however, most single-phase HEAs still encounter the conflict between strength and plasticity, which greatly limits their engineering applications. Here we reported the use of composition design, that is the addition of Ni element into a base alloy of AlCoCrFeTi0.5 HEA, to obtain the body-centered cubic...