The effect of precipitation on the evolution of recrystallization textures in an AA 8011 aluminum alloy sheet

Abstract

The texture of an AA 8011 aluminum alloy sheet cold rolled by 95% showed a typical β-fiber, which runs from the copper orientation [C={112}<111>] over S [{123}<634>] to brass [B={011}<112>]. The development of annealing textures depended on annealing temperatures due to the interaction between precipitation and recrystallization. Upon annealing at a low temperature of 275 o C, precipitation took place before recrystallization. This led to a weak recrystallization texture consisting of {011}<122>, {001}<100>, and {hk0}<001>, among which the {011}<122> orientation developed near large FeAl 3 particles as the main orientation and the cube [{001}<100>] orientation originating from the matrix was relatively weak. After annealing at 350 and 500 o C, a strong cube texture developed along with a weak {011}<122> orientation. When the cube orientation developed, the copper orientation disappeared most rapidly. These results were discussed based on the interaction between precipitation and recrystallization.

Evolution of Recrystallization Textures in Cold-Rolled Commercially Pure Aluminum

“…It is interesting to note that the cube component is lacking in the cold-rolling texture, but it evolves in the annealed sheets. Similar result was obtained in an AA8011 Al alloy sheet [2]. This result cannot be explained by the well-known oriented nucleation (ON) theory [3] and oriented growth (OG) theory [4] for the Rex texture evolution.…”