TEXTURE EVOLUTION OF IF STEEL DUE TO RECRYSTALLIZATION

The evolution of texture due to recrystallization was investigated in cold rolled Ti-bearing IF steel sheets using Electron Back Scattering Pattern (EBSP). The aim of this study was to obtain a real picture of the formation of the recrystallization texture of IF steel sheets, whi ch would contribute to proper texture control for improving deep drawa bility. The deformed grains can be roughly classified by the following 5 orientation groups: (1) ND//[111] and RD//[112]similar to[110], (2) ND//[111]similar to[335] and RD//[110], (3) around {112}[110], (4) ar ound {100}[110] and (5) widely scattered orientations. Their ratios of frequency of finding are approximately 12:4:4:5:2. Deformed grains of types (1) and (5) recrystallized at the early stage of recrystallizat ion. The nucleation sites are both grain boundaries and grain interior , The orientations of grains recrystallized from a grain of type (1) a re ND//(111) and RD//[112]similar to[110] while the orientations of gr ains recrystallized from a grain of type (5) are widely scattered. Mos t of the deformed grains of types (2), (3) and (4) recrystallized at t he later stage of recrystallization. The recrystallization of these gr ains of types progresses through the growth of already recrystallized neighboring grains if the neighboring grains are types (1) and (5). Th ere exist no preferential misorientation axes for migrating recrystall ization fronts. Most of the misorientation angles lie between 20 degre es and 55 degrees.