Is there a relationship between the stacking fault character and the activated mode of plasticity of Fe–Mn-based austenitic steels?

By changing the testing temperature, an austenitic Fe–Mn–Al–Si alloy presents either ε-martensite transformation or mechanical twinning during straining. In order to understand the nucleation and growth mechanisms involved in both phenomena, defects and particularly stacking faults, were characterized by transmission electron microscopy. It is observed that the character of the stacking faults also changes (from extrinsic to intrinsic) together with the temperature and the activated mode of plasticity.