Effect of rolling on microstructure and mechanical properties of HPS Al/Mg/Al composite plates

Al/Mg/Al composite plates were fabricated by hot pressed sintering (HPS) and hot rolling. The main purpose of this study is to understand the effect of rolling on the microstructure, interface and mechanical properties of HPS Al/Mg/Al composite plates. Rolling can increase the compactness of the microstructure by improving the distribution of internal voids and promote the diffusion of interfacial elements, forming a transition layer consisting of phases $\beta$-Al₃Mg₂ and $\gamma$-Al${}_{12}$Mg${}_{17}$, which improves the strength, plasticity, interfacial bonding strength and interfacial deformation compatibility of the HPS Al/Mg/Al composite plates. The bending strength, tensile strength and elongation of HPS Al/Mg/Al composite plates after rolling are 520 MPa, 300 MPa and 17%, respectively. The fracture mode changes from brittle intergranular fracture to ductile dimple.