EBSD Characterization of Microstructure and Micro-texture in a Friction Stir-Welded DP600 Steel

The microstructure and micro-texture in different areas of a friction stir (FS)-welded DP600 steel were investigated by means electron backscatter diffraction. volume fraction martensite non-polygonal ferrite was evaluated based on the image quality (IQ) parameter. Analysis grain boundaries revealed that sub-grain as well low-angle heat-affected zone (HAZ) (SZ) more than doubled compared to those base metal (BM). examination BM showed strong {112} < 110 > {111} 112 components with an intensity 4.6 times random texture. texture memory effect HAZ, reduced overall intensity. Within SZ, D1, D2 E shear together cube component developed. Formation these attributed transformation B R prior austenite, which are evidences continuous dynamic recrystallization mechanism SZ stir-welded steel.