Mechanical characterization of alumina and graphite dual particulates reinforced hybrid aluminum alloy (Al2219) matrix composites

The current study involved the production of hybrid composites employing a liquid metallurgical technique, combining Al2219 alloy with Al2O3 and graphite. The Al2219 alloy was employed to fabricate hybrid composites consisting of Al2O3 particles, ranging from 3 to 6 weight percent, and a constant 2 weight percent of graphite particles. The generated composites underwent microstructural investigation using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The density, hardness, ultimate strength, yield strength, and elongation were determined according to ASTM standards. The SEM revealed that both graphite and Al2O3 particles were uniformly distributed within the Al2219 alloy. The EDS revealed the presence of hybrid particles in the Al2219 alloy. The incorporation of dual particles into the matrix resulted in a decrease in the density of aluminium alloy composites. The incorporation of dual particles enhanced the hardness of Al2219 alloy by 22%, ultimate strength by 36.7%, and yield strength 38.5%. The EDS results indicated that the Al2219 alloy contains hybrid particles. The incorporation of dual particles into the matrix resulted in a decrease in t