VARIATION OF CRYSTALLITE ORIENTATION IN SUBSURFACE LAYERS OF POLYCRYSTALLINE ALUMINUM ON DIFFUSIVE INTERACTION WITH GALLIUM

The evolution of the structural characteristics (stressed state and te xture) of roll-strained (epsilon = 15%) aluminum on gallium diffusion at close to room temperatures was studied. Orientation transformations in subsurface layers of the matrix were observed. At the early stages of Al-Ga interaction the initial texture components disappear and new orientations appear. {100} [001], {100} [011], {112} [110], {111} [11 0] . Primary recrystallization takes place initiated by diffusion of g allium. After 6 h {112} [111] orientation appears in the matrix, then the initial texture components are gradually restored. The predominant role is that of secondary recrystallization processes. The results of the study can elucidate the mechanism of Al-Ga diffusive interaction, conditions of hardening and softening of the matrix metal.