Effects of strain amplitude and temperature on the damping capacity of an Fe-19Mn alloy with different microstructures

►Internal friction of solution treated Fe-19Mn alloy is related to strain amplitude. ►Internal friction of cold-drawn Fe-19Mn alloy is independent of strain amplitude. ►IF of cold-drawn alloy increases from RT to 500 °C. ►There is an IF peak of solution treated alloy in heating and cooling process separately. ►The results can be explained using the movement of dislocations.