Effect of Rolling Speed, Friction, and Strain on Microstructure, Grain Structure, and Mechanical Properties of Al/Mg/Al Laminated Composite

The effect of rolling speed, rolling friction, and rolling strain on microstructure, grain structure, and mechanical properties of Al/Mg/Al laminated composite fabricated by accumulative roll bonding (ARB) was explored in this study. The microstructural findings showed that more plastic instabilities occurred at higher strains, lower speeds, and higher frictions. Additionally, more reduction in grain size was found in Al and Mg layers at higher strains, lower speeds, and higher frictions. Similarly, the hardness of Al and Mg layers showed the highest values of 70 and 68 HV, respectively, after processing by the lowest rolling speed and the highest rolling friction. However, the variations of tensile properties were different versus rolling conditions. By increasing the rolling strain and friction, the strength of composites increased while the elongation decreased. Also, by increasing the rolling speed, the elongation of composites grew while the strength declined. After the final ARB pass, the highest strength of 400 MPa was obtained using the highest friction and the lowest speed while the highest elongation of 8% was achieved by employing the lowest speed.