A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

The CoCrFeMnNi alloy is one of the most notable first-generation high-entropy alloys and also known as a Cantor alloy. This was first proposed in 2004 shows promising performance at cryogenic temperatures (CTs). Subsequent research has indicated that equiatomic ternary CoCrNi medium-entropy (MEA), subset family, better mechanical properties than Interestingly, both strength ductility MEA are higher CTs room temperature. CoCrNi-based have attracted considerable attention metallic materials community it therefore important to generalize summarize latest progress research. present review initially briefly introduces discovery MEA. Subsequently, its tensile response deformation mechanisms summarized. In particular, effects parameters, such critical resolved shear stress, stacking fault energy short-range ordering, on behavior discussed detail. methods for strengthening then reviewed divided into two categories, namely, modifying microstructures adjusting chemical compositions. addition, MEAs, including their dynamic properties, creep fracture toughness, deliberated. Finally, development prospects MEAs proposed.