Randomization of the annealing texture in aluminum 5182 sheet by cross-rolling

In order to obtain a randomization of the annealing texture in aluminum AA5 182 sheet, the cold-rolling texture is modified through introduction of an additional step of cross-rolling during the deformation. The beta -fiber or ientations that form during the preceding normal cold-rolling are unstable under cross-rolling conditions. Rather, preferred orientations with {011}// ND (alpha -fiber) develop. A proper control of the respective reduction deg rees before and after the cross-rolling leads to the formation of strong or ientation densities along the alpha -fiber. After recrystallization anneali ng, the cross-rolled samples depict a very weak, almost random texture. Thi s texture randomization is explained by a suppression of both the nucleatio n and the subsequent growth of the {001}< 100 > cube orientation which prev ails in normally rolled and recrystallized Al sheets. Because of the result ing homogeneous planar anisotropy (R approximate to 1) of the randomly text ured sheets, a better sheet formability was obtained than in conventional s heets with a pronounced cube texture. (C) 2001 Elsevier Science B.V. All ri ghts reserved.