SEM-EBSD Observations of Crack Initiation and Propagation due to Orientation Changes during Forming in Mild Steel

The change in crystallographic orientation distribution during deformation by deep drawing in mild steel has been investigated in order to understand their role in initiation and propagation of crack. The results show that the change of grain orientation from the initial recrystallization texture component of {111} to deformation orientation {111} incites the initiation and propagation of transgranular cracking in the region of {111} small grains. Moreover, the transgranular misorientation and local orientation are analyzed in detail to discuss the change from {111} to {111}. The SEM-EBSD technique was used to reveal that change of orientationm, XRD was performed for the characterization of the global evolution of texture for deformed samples.