Effect of Bimodal Grain Size Distribution on the Strain Hardening Behavior of a Medium-Entropy Alloy

The evolution of strain hardening behavior the Fe50(CoCrMnNi)50 medium-entropy alloy as a function fraction recrystallized microstructure and grain size was studied using Hollomon Ludwigson equations. specimens under study were partially recrystallized, fully with ultrafine-grained microstructure, coarse grains. yield strength decreases steadily increases due to recovery process Hall–Petch effect. Interestingly, bimodal distribution found have significant impact on during plastic deformation. For instance, highest ultimate tensile exhibited by 0.97 μm specimen, which observed contain distribution. Furthermore, equation, effect established from K2 n1 curves. These curves tend show very high values in compared those that homogenous Additionally, contributes extensive Lüders induces deviation equation at lower strains.