Determining by Electron Back Scatter Diffraction Technique of the Evolution of the Texture in TRIP Steels Under a Deep-Drawing Multiaxial Stresses System

Transformation induced plasticity (TRIP) steels, which were initially developed for automotive applications, have attracted a growing interest due to the fact that they exhibit a combination of high strength and ductility through their multi-phase microstructure that includes ferrite, bainite and retained austenite. This one transforms to martensite under the external tensile stress. The characterization of microstructure is necessary for understanding its relationship with steel properties. Electron Back Scatter Diffraction (EBSD) technique could be used successfully for determining the texture and fiber-texture components in body centered cubic (BCC) and face centered cubic (FCC) phases and try to establish the role of deformation in microstructure transformation. The main aim of the present work is to evaluate the changes in the microstructure and texture of TRIP sheet steel by EBSD technique due to the multiaxial stresses taking place during stamping operations.