Tensile properties of high- and medium-entropy alloys

Equiatomic, face-centered-cubic, high- and medium-entropy alloys were arc melted, hot-rolled to produce recrystallized sheets, and tensile tested. The alloys having the compositions CrMnFeCoNi and CrFeCoNi exhibited a strong temperature-dependent decrease in strength with increasing temperature from −196 °C to 1000 °C, and a relatively weak strain-rate dependence (at 10−3 and 10−1 s−1). Ductility did not vary inversely with yield strength;...