Microstructure and mechanical properties of a mixed Si–Al TRIP-assisted steel subjected to continuous galvanizing heat treatments

Heat treatments with an isothermal bainitic transformation temperature of 465°C compatible with the continuous galvanizing process were performed on a 0.2C–1.5Mn–1.0Si–0.5Al (wt%) TRIP-assisted steel. The effect of intercritical annealing temperature and isothermal bainitic transformation (IBT) time at 465°C on mechanical properties and microstructure were determined. The best combination of strength and ductility was obtained for the lower …