Mechanical Properties of 7075 Aluminum Alloy Matrix/Al2O3 Particles Reinforced Composites

Abstract

7075 Aluminum alloy metal matrix composites (í µí±€í µí±€í µí° ¶ í µí±) with different wt % of Al2O3. (0.2, 0.4, 0.6, 0.8, and 1), the size of reinforced particles is 10 Nano meter , were fabricated using stir casting technique. The influence of adding Al2O3 particles content on the mechanical properties of the í µí±€í µí±€í µí° ¶ í µí±. It was observed that the nanomaterial reinforcement led to high improvement in BHN hardness ultimate strength (í µí¼Ž í µí±¢), yield stress (í µí¼Ž í µí±¦) and ductility. The improvements were due to regular distribution of Al2O3 and refinement of aluminum 7075 grains. The maximum improvement in BHN hardness, í µí¼Ž í µí±¢ and í µí¼Ž í µí±¦ was observed at 0.2 wt %. Al2O3. While the minimum value of ϵ % was obtained at 0.2 wt % Al2O3. Keywords-7075 Al. matrix, Al2O3 nanomaterial, stir casting method í µí±€í µí±€í µí° ¶ í µí± , mechanical properties (í µí±€í µí±€í µí° ¶ í µí±).