High strength Al with uniformly distributed Al2O3 fragments fabricated by accumulative roll bonding and plasma electrolytic oxidation

Accumulative roll bonding (ARB) and plasma electrolytic oxidation (PEO) were used to fabricate Al/Al2O3 composite. A uniform distribution of Al2O3 fragments was achieved within the Al matrix after six ARB cycles. In contrast to the large fragments, small fragments contained no porosity and revealed good bonding at interfaces. The Al/Al2O3 composite exhibited improved tensile strength of about 180 MPa, in comparison to the annealed Al (47 MPa).