Effects of alloying elements on martensitic transformation behavior and damping capacity in Fe–17Mn alloy

Abstract Effect of carbon and Ti on ɣ ↔ e martensitic transformation behavior and damping capacity is investigated in an Fe–17Mn alloy. The suppressive force of carbon against ɣ → e transformation increase linearly with an increase in its content, lowering Ms temperature and volume fraction of e martensite. Carbon deteriorates damping capacity by reducing the area of ɣ/e boundaries and mobility of the boundaries contributing to anelastic deformation. The reduction in the mobility of the boundaries is accelerated when carbon-containing alloy is aged at higher temperatures than room temperature. The effect of Ti on damping capacity is found to be beneficial in carbon-containing alloy, which is attributed to the depletion of carbon solute due to the formation of TiC.