Evolution of the Brass texture in an Al-Cu-Mg alloy during hot rolling

Texture and microstructure development of Al-4Cu-1.6Mg alloy during hot rolling was examined by using XRD, EBSD and TEM. The results showed that starting with a random texture during the early stages of rolling with reduction lower than 58.9% at blooming temperature of 430 degrees C, the materials developed a typical a-fiber texture in the center layer as deformation reduction reached 75.7%. And then the a-fiber textures in the center layer rotated into Brass component mainly through the activity of {111} < 110 > slip system as the reduction reached 96.3%. Different from the center textures, the main texture in the surface layer was r-Cube with 96.3% reduction. The increase in rolling temperature was beneficial for the enhanced texture intensity of Brass component in the center layer. The analysis of substructure energy density indicated that Brass subgrain had a lower substructural energy density than other oriented subgrains, which together with increased slip rate at elevated temperature, contributed to the development of center Brass texture. (C) 2016 Elsevier B.V. All rights reserved.