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

The microstructural and textural changes during recovery and recrystal lization in two high-purity aluminum bicrystals with S orientations de formed by channel die compression have been studied in detail. The def ormation part of the study was reported previously [Blicharski et al., Acta metall. mater. 41, 2007 (1993)]. In the present study, the annea ling kinetics, the microtextural characteristics of nucleation, and th e textures at partial and full recrystallization, were carefully exami ned. The results of the present study, together with those of earlier investigations [Bunge, Texture Analysis in Materials Science, Butterwo rth, 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 expla ining the recrystallization textures. We believe that both of these me chanisms are equally important for the formation of annealing textures .