Effect of asymmetric rolling on texture and plastic ductility of aluminum

The development of crystallographic texture during the asymmetric rolling of pure aluminum was investigated both experimentally and through modeling. The rolling asymmetry was introduced by differences in the diameters of the rolls, which rotated at the same angular velocity. Additionally, a tilted entry of the rolled band between the rolls was used to enhance the process asymmetry. Crystallographic texture variation across the thickness of the rolled bar was determined using X-ray diffraction and analyzed theoretically. The Finite Element Method (FEM) was used to calculate the stress and strain fields in the material, which were then applied as boundary conditions in crystal plasticity (CP) modeling.

The observed effects of asymmetric rolling include shifts of the selected texture maxima in the orientation space. Furthermore, asymmetric rolling leads to texture homogenization throughout the sample's depth, driven by the development of strong shear stress and strain components within the material. This texture homogenization influences plastic ductility, as evidenced by an increase in the maximum strain at fracture during tensile tests.

This work was supported by a grant from the National Science Centre (NCN), No. UMO-2023/49/B/ST11/00774.