Temperature-dependent universal dislocation structures and transition of plasticity enhancing mechanisms of the Fe40Mn40Co10Cr10 high entropy alloy

• Temperature-dependent mechanical properties and deformation mechanisms of the Fe 40 Mn 40 Co 10 Cr 10 alloy were investigated. • Dislocation structures are similar for both the room-temperature deformation and deformation at −50 °C. • The room temperature deformation accompanies deformation twinning and the subzero temperature deformation involves deformation-induced HCP martensite. • At the high deformation level of the deformation at −50 °C,...