Influence of texture pre-regulation on anisotropy of Mg/Al composite plates and microstructure evolution in magnesium matrix

To address the issue of anisotropy in hot-rolled Al/Mg/Al composite plates, a magnesium alloy sheet with a deflection texture was pre-prepared through the bending limit width straightening (BLWS) process, and then hot-rolled composite with aluminum alloy. The influence of microstructural evolution in magnesium matrices on the mechanical properties of composite plates was investigated. The results indicate that both partial continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) diverge from the orientation of the parent grain, thereby significantly decrease the strength of the basal texture. When the initial texture exhibits non-basal orientation, the activation of the (10−10) < 1–210 > prismatic slip system is facilitated, thereby enhancing the coordinated deformation capability of grains along the C-axis direction. Consequently, the fracture elongation (FE) in the rolling direction (RD) increased from 4.6 % to 23.7 %, while that in the transverse direction (TD) rose from 21.3 % to 24.8 %, which makes the composite plate isotropic. The texture pre-regulation process offers a novel approach for optimizing the mechanical properties of Al/Mg/Al composite plates.