Effects of Deformation Texture and Microstructure on Recrystallization and Grain Growth in Twip Steels

The importance of TWinning Induced Plasticity (TWIP) and TRansformation Induced Plasticity (TRIP) has increased drastically in the recent past due their potential for automobile applications. These steels have good combination of specific strength and ductility, which could improve the crash resistance or energy absorption capacity in the situations like accidents. Stacking Fault Energy (SFE) is the most important parameter for the design of such steels. In low SFE TWIP steels, Brass (Bs)-type texture typically develops during rolling. Present investigation deals with the role of deformation texture, microstructure and SFE in recrystallization kinetics and grain growth, during processing in medium Mn steels. The SFE of Fe-12Mn-0.5C (wt %) alloy could be altered by the addition of alloying elements, such as Al. Recrystallization experiments have been carried out in cold rolled samples for different annealing times. In order to understand the recrystallization kinetics and grain growth phenomenon, detailed microstructural characterization has been performed by using Electron back-scatter diffraction (EBSD).