Control of textures in aluminum solid solution alloys by high-temperature deformation

Abstract

Texture development due to the preferential dynamic grain growth mechanism proposed by the authors is reviewed. The mechanism consists of (1) preferential growth of grains with low stored energy which corresponds to the low value of Taylor factor, (2) enhancement of the orientation dependence of stored energy originating from the homogenous distribution of dislocations caused by the effect of solute atmosphere on dislocation motion, and (3) stability of orientation against deformation. The experimental results supporting the mechanism are given on Al-Mg and Al-Cu alloys deformed at high temperatures by uniaxial compression and plane strain compression deformation. Examination of Fe-Si alloy shows that the mechanism holds also in BCC solid solution alloys.