INFLUENCE OF SECONDARY ROLLING DIRECTION ON RECRYSTALLIZATION TEXTURES OF COMMERCIAL PURITY ALUMINUM

摘要

Hot rolled sheets of commercial purity aluminum were rolled to 90 % reduction and annealed at 250°C for 30 min, to partially annealed state about 50 % softening ratio. Subsequently partially annealed sheets were rolled to about 20 % reduction at various directions, i.e. 0, 22.5, 45, 67.5 and 90 °from the primary rolling direction, and annealed fully at 400°C for 2 min. {111} pole figures were measured at the rolling surface and inner layer after chemical polishing. When the secondary rolling direction was parallel to the primary rolling direction, formation of cube texture with orientation spread around the primary rolling direction was observed, being consistent with the result of previous research. A sharp recrystallization texture with two components indexed as near (221) [114] and (121) [113] formed, when the secondary rolling direction was at 45°from the primary rolling direction. This was ascribed to retaining of rolling texture by strain induced boundary migration.