Texture evolution behavior and anisotropy of 2A97 Al–Li alloy during recrystallization at elevated temperature

Abstract

2A97 Al–Li alloy was cold-rolled to 2 mm and then thermally exposed at different temperatures for 1 h and at 723 K for different time, respectively. The texture evolution behavior and the anisotropy of 2A97 Al–Li alloy were investigated. The result shows that the {001} 〈120〉 and {011} 〈233〉 textures are the dominant recrystallization texture. The {124} 〈211〉 texture is the final recrystallization texture. In case of low-temperature thermal exposure (473, 573 K), the {011} 〈211〉 texture is aggregated to the {112} 〈111〉 and {123} 〈634〉 textures. During the recrystallization at 723 K, the {001} 〈110〉, {111} 〈112〉 and {011} 〈100〉 textures are the intermediate transition grain orientations. The concurrent precipitation of Al20Cu2Mn3 and Al3Zr results in the occurrence of unusually sharp {011} 〈233〉 and {001} 〈120〉 texture components during recrystallization. The alloy with both recrystallization and deformation texture possesses the smallest anisotropic, and the texture is the direct reason that results in the anisotropy.