In present contest Aluminium based metal matrix composites are rapidly developing group of materials due to their unique combination of properties that include low weight, elevated strength, improved wear and corrosion resistance and relatively good ductility. Obtaining good properties with aluminium as ductile matrix blended with different reinforcement. Generally most common methods for producing this type of metal matrix composites is powder metallurgy since it has many variations and also is relatively low-cost method. A lot of different techniques of compacting aluminium alloy powders have been previously investigated. Among those techniques equal channel angular pressing and powder metallurgy etc. Equal-channel angular pressing (ECAP) is an effective fabrication process for obtaining ultrafine-grained materials. This paper emphasis on aluminum alloy composite processed by ECAP with different passes at room temperature. The factors influencing the mechanical characters are observed, including the die corner angle within the ECAP die and the number of imposed passes. It is shown that good properties may be achieved through ECAP processing when the number of passes in ECAP is reasonably high.(ECAP) stands out due to its beneficial influence on the main problem that arises during powder compaction and that is a non-uniform distribution of reinforcement particles. This paper gives an overview on ECAP method principles, advantages and produced powder composite properties.
