Materials Science Forum, Vol.408-4, 1501-1506, 2002
Texture evolution during hot deformation and annealing of AA5182 alloy
Specimens of high initial cube texture in AA5182 alloy have been deformed at 400degreesC to a strain of 2.0 under plane strain compression conditions. Bulk texture analysis shows that significant fractions of cube grains are maintained after deformation, but that they are diminished during subsequent annealing. The progression of recrystallisation in the deformed matrix has been studied by the techniques of orientation imaging microscopy (OIM) and 3 dimensional X-ray diffraction microscopy (3DXRD). Microtexture data from OIM show that while the deformed bands of cube subgrains are partly consumed by the recrystallising grains of non-cube orientations, they also remain to be the last part of the deformed matrix to recrystallise. Results from the 3DXRD experiments indicate that the nucleation frequency of cube grains is so low that the final texture is dominated by random orientations.