Al6061-GRAPHITE-TUNGSTEN CARBIDE HYBRID COMPOSITES : LAP Lambert Academic Publishing : 9786202799584 : 6202799587 : 09 Sep 2020 : This Book describes the investigations carried out on base Al6061 alloy, Al6061-WC MMCs and Al6061-WC-Gr MMHCs. The composites were developed by liquid metallurgy technique. In the development of Al6061-WC MMCs and Al6061-WC-Gr MMHCs the tungsten carbide of 1-4 wt% used as a primary reinforcement, and a constant 4 wt% graphite (Gr) used as a secondary reinforcements in Al6061-WC-Gr MMHCs.The manufactured composites were treated with T6 heat treatment for different ageing times of 1, 3 and 5 h. As-cast and heat treated composites were characterized for their physical, mechanical and tribological properties. The mechanical and wear properties were investigated according to the ASTM standard testing procedures. The composites properties were investigated in as- cast and heat treated conditions.Scanning Electron Micrographs (SEM) of tensile fracture surfaces of