Rolling and recrystallization textures in directionally solidified aluminium

Abstract

From directionally solidified aluminium with a 〈100〉 fibre texture specimens of different orientations were cut and the textures after rolling (95% reduction) and recrystallization were determined. The results are discussed on the basis of the current concepts on deformation and recrystallization in single and polycrystalline materials. Due to the strong influence of the different starting textures, characteristic differences in the rolling textures are obtained. For the first time, a case is reported for which an experimental rolling texture is completely explicable in terms of the Taylor theory under full constraints condition. Further, the recrystallization textures, although appearing more uniform, exhibit clear differences which yield new evidence with respect to the mechanisms of formation of the cube texture. It shows that in the present case for obtaining a pronounced cube texture, both the conditions of oriented growth (in the sense of 40° 〈111〉 rotations) and oriented nucleation (in the sense of properly oriented transition bands) must occur.