An Experimental Study on Mechanical Properties of Stir Casted Hybrid Al Metal Matrix Composite Reinforced with Al2O3 and TiO2

This study investigates the impact of incorporating aluminum oxide (Al2O3) and titanium dioxide (TiO2) into an aluminum matrix. The primary objectives of this research were to create composite materials with a high strength-to-weight ratio and to assess their mechanical properties. The experiment involved the homogenous dispersion of 99.9% pure aluminum powder with Al2O3 and TiO2 reinforcements. Three samples were produced by the stir casting method, utilizing finely ground aluminum powder mixed with an equal proportion of Al2O3 and TiO2 (2.5% Al2O3 + 2.5% TiO2, 5% Al2O3 + 5% TiO2, 7.5% Al2O3 + 7.5% TiO2). The morphological distribution of reinforcements was determined through structural analysis utilizing a scanning electron microscope (SEM). Tests were undertaken to examine the mechanical qualities of hardness, tensile strength and impact strength. The addition of reinforcement to the aluminum matrix leads to a reduction in hardness. The highest tensile strength observed in the sample reinforced with a combination of 5% Al2O3 and 5% TiO2. Conversely, the incorporation of reinforcements was observed to enhance the impact strength. The current hybrid aluminum metal matrix composite is considered valuable for diverse engineering applications that require a high strength-to-weight ratio.