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

摘要

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}and{011}textures are the dominant recrystallization texture.The{124}texture is the final recrystallization texture.In case of low-temperature thermal exposure(473,573 K),the{011}texture is aggregated to the{112}and{123}textures.During the recrystallization at 723 K,the{001},{111}and{011}textures are the intermediate transition grain orientations.The concurrent precipitation of Al_(20)Cu_(2)Mn_(3)and Al_(3)Zr results in the occurrence of unusually sharp{011}and{001}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.