Deformation mechanisms operating in TWIP/TRIP steels processed by warm to hot working

Abstract

The mechanical properties of medium to high-Mn austenitic TWIP/TRIP steels subjected to warm to hot working were studied. The steel samples were processed by plate rolling at various temperatures ranging from 500 ◦C to 1150 ◦C. The deformation microstructures depend significantly on the rolling temperature. The discontinuous dynamic recrystallization readily developed during hot rolling at temperatures of T ≥ 800 ◦C, whereas the work hardened microstructures with high dislocation densities evolved by warm rolling at temperatures below 800 ◦C