Effect of Ni Foil Interlayer on the Interface Structure and Mechanical Properties of Hot-Rolled Al/Mg Composite Plates

The article delves into the effects of introducing Ni foil interlayers on the interface structure and mechanical properties of hot-rolled Al/Mg composite plates. It examines how varying thicknesses of Ni foil influence the interfacial bonding strength and tensile strength of these composite materials. The study reveals that the optimal thickness of Ni foil for maximizing interfacial peel strength and tensile strength is 25 micrometers. The research highlights the transformation of the interface from a single diffusion between Al and Mg to a multiphase hybrid interface formed by mutual diffusion between Al, Mg, and Ni. This alteration effectively enhances the interfacial bond strength. Additionally, the article discusses the strain-induced plastic deformation at the interface, which refines the grain size of the Mg layer and reduces dislocation density, thereby improving the formability of the Al/Mg composite plate. The grain orientation on the Al side transitions from a single <111> orientation to a mixed <111> and <100> orientation, contributing to a better strengthening effect. Overall, the study concludes that the introduction of Ni foil significantly improves the mechanical properties of Al/Mg composite plates, making it a valuable read for professionals in materials science and engineering.