3. Composite leaf spring
To manufacture new composite material, 20% of Boron carbide material used as reinforced material in the Aluminum matrix. Metal Matrix composite based specimen has fabricated by stir casting method. The tensile test and hardness test has performed on the specimen. The result shows that the ultimate tensile strength of new composite material is 595 MPa and hardness is 236 BHN. The hardness of composite leaf spring is higher than the EN45 steel spring (185BHN). The tensile strength and hardness of the composite material have confirmed that material is suitable for the manufacturing of leaf spring. Again for manufacture metal matrix composite leaf spring, Aluminum of grade 7075- T651 has taken as base material and 20% by weight of boron carbide used as reinforcement material. Metal Matrix-based composite leaf spring shown in fig.3.1.