Special Orientation Relationships Observed at the Early Stages of Recrystallization in Pure AlMn Alloy

Electron Back Scattering Diffraction (EBSD) technique in a SEM was used to obtain local orientational information on new grains and their surrounding deformed matrices at the early stages of recrystallization in pure A1-1.3%Mn alloy. Results show that special orientation relationships including twin-relationship often exist between new grains, between new grains and deformed grains or between deformed grains. The occurrence of such special orientation relationships is attributed to the special deformation behavior in the samples with large initial grain size. The formation of recrystallization twins is discussed in a different way to those of traditional ones.