Effects of Carbon Content and Cold Working on Damping Capacity and Mechanical Property of Fe-17wt.%Mn Martensitic Alloy

Effect of carbon content on damping capacity of Fe-17%Mn alloy is investigated by varying the carbon content from 0.02wt% to 0.28wt%. And cold rolling is conducted to examine its influence on damping capacity and mechanical properties in an Fe-17%Mn-0.02%C alloy. With the increase in carbon content, damping capacity decreases due to the area reduction of γ/ε boundaries and their mobility. Cold rolling up to 10% is found to improve strength as well as damping capacity in an Fe-17%Mn-0.02%C alloy without significant decrease in elongation. Fe-17%Mn-X%C alloy system containing carbon below about 0.1wt%, exhibiting superior mechanical properties and good damping capacities at high strain amplitudes, can preferably be applied as structural materials subjected to high amplitude vibration