J. Phys. IV France 07 (1997) C5-453-C5-458
Effects of Alloying Elements on Martensitic Transformation Behavior and Damping Capacity in Fe-17Mn AlloyS.H. Baik1, J.C. Kim1, K.K. Jee2, W.Y. Jang3 and M.C. Shin2
1 Woojin Inc., Research Institute of Measuring Technology, C.P.O. Box 6666, Seoul, Korea
2 Korea Institute of Science of Technology, Division of Metals, Seoul 136-791, Korea
3 Chosun University, Department of Metallurgical Engineering, Kwangju 501-759, Korea
Effect of carbon and Ti on γ ←→ εmartensitic transformation behavior and damping capacity has been investigated in an Fe-17Mn alloy. The suppressive force of carbon against γ ←→ ε transformation increases linearly with an increase in carbon content, lowering Ms temperature and volume fraction of ε martensite. Carbon deteriorates damping capacity by reducing the area of γ/ε interfaces and by decreasing the mobility of the interfaces operated as damping source. The reduction in the mobility of the interfaces is accelerated when carbon-containing alloy is aged at high temperatures. The effect of Ti on the damping capacity is found to be beneficial in carbon-containing alloy, because the Ti contributes to depletion of carbon solute by the formation of TiC.
© EDP Sciences 1997