The influence of deformation texture on nucleation and growth of cube grains during primary recrystallization of AA1050 alloy

The influences of microstructure and texture on the early stages of recrystallization of a commercial AA1050 alloy have been characterized with particular attention to cube grain formation. Samples were deformed along two deformation modes to form different as-deformed texture components and then lightly annealed: one group was plane strain compressed (PSC) in a channel-die, whereas the second group was deformed by equal channel angular extrusion (ECAE). The textures were measured by X-ray diffraction and SEM/EBSD. After both deformation modes a very weak residual cube texture component was observed in the samples. Cube-oriented grains were not formed during annealing of the ECAE samples whose main as-deformed texture components were close to {124}< 651 >. During recrystallization these transformed to two components of similar to{100}< 011 > and similar to{221}< 114 >-type essentially by < 110 > rotations. Cube grains were extensively formed only during annealing of PSC samples. They were situated preferentially inside or in between the S-oriented deformed areas with local misorientations about < 111 > axes. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.