Effect of intermediate annealing on microstructure and mechanical property of a Fe−19Mn−0.6C TWIP steel

Abstract Annealing is an effective strategy to improve the properties of high-strength twin-induced plasticity (TWIP) steels, however, adaption intermediate annealing during cold rolling (CR) scarcely studied. Here, Fe-19Mn-0.6C TWIP steel was subjected CR-annealing and CR-intermediate annealing-CR-annealing processes at room temperature determine role in improvement microstructure mechanical properties. The total cold-rolled reduction both 75%. morphological phase characterizations annealed for 1 h showed that uneven element distribution had occurred as greater than recrystallization start temperature, causing presence minor carbides. Moreover, carbides vanished end were quantitatively analyzed content via refined XRD. Finally, recrystallized austenite grains completely replaced cold-deformed microstructures. At same CR 75%, exerted facilitates formation twins, endowing tensile strength vast increase. This would provide a significant reference steels annealing.