Simultaneous Enhancement of Mechanical Behavior of Al Matrix Composites Reinforced with ZrB2 and TiB2 Particles

The present investigation focused on the mechanical and tribological behavior of Al7075-ZrB2-TiB2 composites has been manufactured by a low cost stir casting technique. Al7075 alloy has rational strength and hardness; this used in the automobile, defense, and aircraft industries. The microstructural characterizations by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and mechanical properties were evaluated by mechanical. The combination of ZrB2 and TiB2 reinforcement to the Al matrix was completed at different weight % such as 2, 4, 6, and 8. Raw Al has a hardness of 87 HRB, and it was enhanced to 104 HRB by ZrB2 and TiB2 reinforcement. ZrB2 and TiB2 reinforcement show significant enhancement in mechanical properties of yield strength as 529 MPa and compressive strength of 630 MPa. The hardness, tensile strength, and compressive strength of the Al7075-8%ZrB2-2%TiB2 composite was enhanced by 24.3%, 25.8%, and 18.2% while compared to raw Al.