Microstructural and Textural Evolutions in a Cold Rolled High Mn TWIP Steel

A fully austenitic TWIP steel was cold rolled. During cold rolling, the evolution of the crystallographic texture was monitored. The development of a brass type of texture was found, which is typical for low stacking fault energy (SFE) materials. Intensive electron microscopic observations, with TEM and SEM, revealed four active deformation mechanisms: micro twinning, dislocation slip, the formation of stacking faults and microscopic shear banding. The effect of macroscopic shear banding was expected to be minimal. Putting together all the results showed that both micro twinning and slip play a major role in the development of the observed brass texture.