A REVIEW ON MACHINING AND TRIBOLOGICAL BEHAVIORS OF ALUMINIUM HYBRID COMPOSITES

Aluminium hybrid metal matrix composites have been widely used as substitute materials in automobile, aero space and structural applications because of their high wear resistance and strength to weight ratio. Manufacturing these types of composites is growing worldwide. Hybrid metal matrix composites are advance engineering materials reinforced with two or more different materials which posses combined and improved physical, mechanical and tribological properties. The present study deals with aluminium metal matrix composites with multiple reinforcement showing improved mechanical and tribological properties. The addition of graphite content to aluminium composites improves the tensile strength, elastic modulus and machinablity due to the solid lubricating property of the graphite particles. It also increases the thermal and electrical conductivity that can improve the conducting capability of these composites. The effect of adding alumina into aluminium composites also increases the tribological and mechanical properties. The addition of the fly ash also increases the properties such as tensile strength, compressive strength, yield strength and hardness of the aluminium composites and hence it can be a better substitute for single reinforced composites.