Nanostructured AA5005/Al2O3 composite manufactured by anodising and accumulative roll bonding

Abstract

ABSTRACTIn this study, nanostructured AA5005/6 vol.-% Al2O3 composite manufactured by anodising and accumulative roll bonding (ARB) processes was investigated. The microstructure of the AA5005/Al2O3 composite after ninth ARB cycle exhibited a good distribution of alumina reinforcement particles in the AA5005 matrix. It was found that with increasing the number of cycles, the tensile strength of the monolithic and composite samples increased, but their ductility decreased at the first ARB cycle and then increased. The mean grain size of the composite sample after the ninth cycle was 88 nm. The tensile strength of the composite was 3.3 times higher than the initial AA5005 sheet. Observations revealed that the failure mode in the AA5005/Al2O3 composite was the shear ductile fracture.