Effect of rolling rates on microstructure and mechanical properties of 6061/AZ31/6061 composite plates
6061/AZ31/6061 composite plates were prepared at different rolling rates at 400℃and 40%reduction.The microstructure,interface morphology,and element distribu-tion of the magnesium layer in 6061/AZ31/6061 composite plates under different rolling rates were observed with optical microscopy(OM),scanning electron microscopy(SEM),and energy dispersive spectroscopy(EDS).The bonding strength and mechanical properties of composite plates under different rolling rates were tested with universal tensile testing ma-chine.The results indicate that AZ31/6061 interface in composite plates is relatively straight and well bonded.As the rolling rate increases,the dynamic recrystallization of AZ31 magne-sium alloy layer gradually increases and the grains become finer.The bonding strength of the composite plate first increases and then slightly decreases,while the yield strength and ten-sile strength gradually decrease,and the elongation gradually increases.
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