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Abstract The main purpose of this work is to investigate the effect of hot rolling on the mechanical properties and microstructures of particulate metal matrix composites prepared by the liquid stirring technique. Different matrices, namely, commercial pure Aluminium, Al 6063, Al 6061, A12.8%Si 2%Mg and Al 4.S%Cu have been used. Different volume fractions and different . . particle sizes of silicon carbide and alumina particles were used as reinforcements. The microstructure and mechanical properties of the rolled composites are compared to the properties of the as-cast specimens. The results show that a lower bound of reduction percent is required for composite strengthening depending on the particulate type and size. In all cases, the matrix type played a key role in the composite behavior. Key words: Metal matrix composites, liquid metal processing of composites, Al alloys, SiC and Al203 reinforcements, hot rolling, microstructure-mechanical relationship. |