Fabrication of Mg/Al alloy multilayered composites by accumulative roll-bonding with large number of cycles

Mg/Al alloy multilayered composites were manufactured by accumulative roll-bonding with large number of cycles. Microstructure of the Mg/Al alloy multilayered composites during ARB process was investigated by optical microscope (OM), scanning electronic microscopy (SEM) and energy disperse spectroscopy (EDS). Tensile strength at ambient temperature was tested on a tensile testing machine and the fractograph was studied by means of scanning electronic microscopy (SEM). The results indicate that the intermetallic compounds, which are formed and grown in the interface of Mg/Al alloy multilayered composites, are significantly refined, and the continuous multilayered morphology of intermetallic compounds is gradually observed with the increasing of the number of ARB cycles. Meanwhile, the bonding degree of layer interfaces is also improved. However, irregular change of the tensile strength is taken place during ARB process.