Bonding behavior of Al–Al2O3 laminations during roll bonding process

Accumulative roll bonding (ARB) is used as a novel method to produce particle reinforced metal matrix composites (MMCs). Roll bonding of the sheets with layers of powder on their surfaces is the main stage in this process and it has been found that quality of the bonding has an important role in properties of the product. In this work, the behavior of alumina particles layer at interface during the rolling is investigated and the effects of particle size and amount of particle at interface on bonding of the commercial pure aluminum sheets are also studied. The results of peeling test indicate that presence of the powder at interface reduces the bond strength. However, it is shown that by increasing the thickness reduction and entry temperature the amount of extruded metal is increased and so the bond strength is improved. It is also found that the bond strength is increased by increasing the particle size.