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.