Elevated Temperature Tensile Behavior of a Nb-Mo Microalloyed Medium Mn Alloy under Quasistatic Loads

The elevated temperature tensile behavior of a Nb-Mo microalloyed medium steel was investigated over the ?50 to 150 °C range. ultimate strength significantly reduced with increasing deformation temperature, but both YS (yield strength) and EI (total elongation) values changed slightly. best product UTS (ultimate (~59.5 GPa·%) can be achieved at 50 °C, implying an excellent combination ductility. Furthermore, change in strain hardening rate as function further explained by following two aspects: dependence mechanical stability retained austenite on well mechanism temperature. Theoretical models experimental observations demonstrate that dominant present Mn from single transformation-induced plasticity (TRIP) effect multiple TRIP + TWIP (twinning-induced plasticity) 50–150 °C.