Influence on Microstructural and Mechanical Properties of Al2O3/Graphite/Flyash-Reinforced Hybrid Composite Using Scrap Aluminum Alloy

This study assessed the possibility of using scrap aluminium alloy as a matrix material and a novel combination of compacted reinforcements were added to molten melt to evaluate their mechanical properties in terms of Compressive Strength, 0.2% offset Yield strength, Ultimate Tensile Strength, Ductility, Hardness and Impact Energy. Fine grain structure was observed in the fabricated composite compared to cast aluminium alloy. The improved mechanical behavior of the fabricated composite may be attributed to the combined effect of grain refinement, dislocation bowing and shear lag mechanism. Fracture morphology of uniaxial tensile test confirmed the transformation of ductile to cleavage fracture. The tensile strength, hardness and compressive strength were overall improved by similar to 34%, similar to 63% and similar to 32%, respectively.