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Aluminum based metal matrix composite was prepared by stir casting process. Generally metal matrix composites are having some benefits due to the present’s reinforcement particles. Basically aluminum material does not have much strength, for increasing its strength and mechanical properties reinforcement particles are like SiC, Boron Carbide, Aluminum Oxide, Titanium Carbide, Fly Ash, Graphite added to base material. In this experiment 2.5% of Al2O3, 5% of Graphite and 5% of Silicon Carbide are added toAl7075 (base material). The Microstructure of composite has been identified under optical microscope. Impact, Hardness, Tensile tests were conducted to find out the strength of the metal matrix composite. To find out the surface finish of composites after machining Taguchi method was adopted for the design of experiments and L9 Orthogonal array was taken to identify the optimum machining parameters affecting surface finish. In adding of 2.5% of Al2O3, 5% of Gr and 5% of SiC the Impact Strength of Izod test is decreased by 23%, 30%, 46% and the Impact Strength of Charpy test is increased by 20%,-20%, and 20% respectively. The Brinell hardness value and Rockwell Hardness is increased by 9%, 3%, 28% and 9%, 1%, 6% respectively compare to the base material Al7075.Tensile Strength is decreased by 17%, 12%, 50% by adding of 2.5% of Al2O3, 5% of Gr and 5% of SiC respectively compare to base alloy. The better surface finish is obtained at speed 1500 rpm, feed 0.05 mm/rev and 1 mm depth of cut for the materials Al7075.The lowest Tool Wear occurred for the material Al7075 at1000 rpm, feed at 0.05 mm/rev and depth of cut at 0.25.

Experimentation on Mechanical Properties and Machinability of Al7075/Al2o3/Gr/Sic Metal Matrix Component