Effect of Al on the stacking fault energy of Fe–18Mn–0.6C twinning-induced plasticity

The effect of Al on the stacking fault energy (SFE) of Fe–18Mn–0.6C twinning-induced plasticity steel was investigated by means of weak-beam dark-field transmission electron microscopy. The SFE of Fe–18Mn–0.6C steel was measured to be 13 ± 3 mJ m−2 and the actual increase in SFE due to adding 1 wt.% Al was approximately +11.3 mJ m−2.