Strain hardening behavior of a TRIP/TWIP steel with 18.8% Mn

▶ TRIP and TWIP effects coexist in this 18.8Mn steel. ▶ The true stress-strain curve can be divided into 4 regions in tension testing. ▶ Deformation mechanisms follow microstructural evolution changing. ▶ The sequence of the two mechanisms during deformation was clarified in details.