Evolution of microstructure and strength during the ultra-fast tempering of Fe–Mn–C martensitic steels

Ultra-fast tempering cycles, combining a rapid heating rate (RH = 300 °C/s) from room temperature to a peak temperature within the range 400–700 °C and subsequent rapid cooling, were performed on a Fe–Mn–C martensitic steel. The influence of the peak temperature reached during the cycle was determined on both the tensile properties of the steel and on its microstructure. The mechanisms controlling the microstructural evolution occurring during …