Crystallographic texture evolution of continuous cast Al-Mn-Mg alloy sheet during cold rolling and annealing

摘要

Development of crystallographic texture of continuous cast (CC) Al-Mn-Mg alloy sheet during cold rolling and annealing was studied. We showed that the Cube orientation {0 0 1}< 1 0 0 > is the major recrystallization texture of the hot rolled CC Al-Mn-Mg alloy sheet with intermediate heat-treatment (IHT). Nevertheless, we were somewhat surprised to find that the P orientation {011} < 5 6 6 > is the dominant recrystallization texture of the hot rolled CC Al-Mn-Mg alloy sheet without the IHT. We assessed the earing tendency of the P orientation {01 1}< 566 > using a modified Tucker model. The simulation results showed that the P orientation {01 1} < 5 6 6 > leads to 30°/60° earing, which exhibits the same earing behavior as deformation textures such as the Copper {112}< 111 >, S {123}< 634 >, and Brass {011}< 211 > orientations. These results lead us to believe that, even after complete recrystallization, the 45° earing could remain somewhat pronounced for CC Al-Mn-Mg sheets without the IHT.