ANNEALING OF ALUMINUM BICRYSTALS WITH S-ORIENTATIONS DEFORMED BY CHANNEL DIE COMPRESSION

The microstructural and textural changes during recovery and recrystallization in two high-purity aluminum bicrystals with S orientations deformed by channel die compression have been studied in detail. The deformation part of the study was reported previously [Blicharski et al., Acta metall. mater. 41, 2007 (1993)]. In the present study, the annealing kinetics, the microtextural characteristics of nucleation, and the textures at partial and full recrystallization, were carefully examined. The results of the present study, together with those of earlier investigations [Bunge, Texture Analysis in Materials Science, Butterworth, London (1982); Hjelen et al., Acta metall. mater. 39, 1377 (1991)], indicate strongly that either the oriented nucleation mechanism or the oriented growth mechanism alone appears to be inadequate for explaining the recrystallization textures. We believe that both of these mechanisms are equally important for the formation of annealing textures.