RECRYSTALLIZATION BEHAVIOR AT DEFORMATION BANDS IN [011]ALUMINUM SINGLE-CRYSTALS

Changes of recrystallization behavior at the special type of band of s econdary slip, which the authors call ''SBSS'', were investigated for [011] aluminum single crystals deformed in tension to 30 and 70% strai ns. At 30% strain, recrystallized grains (RGs) were formed along the S BSSs. They had relationships of [111] rotations or unknown orientation s to the deformed matrix (DM) or SBSS. At 70%, in addition to the form ation of RGs with the above relationships, recrystallized areas were n ewly formed due to the strain induced boundary migration (SIBM). At bo th 30 and 70% strains, the RGs characterized by the [111] rotations do not indicate any specific angle relationship, for example, the 40 deg rees [111] rotation to DM. The ''secondary deformation bands'' (SDBs), which were formed at the wavy pseudo-boundaries (WPBs) at 70% strain, contribute to the formation of recrystallized areas due to the SIBM. A mechanism of orientation selectivity of recrystallized structure wit h increasing strain is discussed.