Mechanical and wear characteristics of (Al7075/SiC/Gr/Zr) hybrid metal matrix composites using ultrasonic assisted stir casting process

The successful combination of lightweight and high strength continues to propel composite materials into new fields. Due to their surface qualities, composite materials can replace traditional materials such as steel, cast iron, and aluminium alloys. In aeronautical and automotive applications, to replace conventional materials, using the ultrasonic assisted stir casting process, produced the composites based on aluminium alloy (Al7075) were reinforced with a 6% volume fraction of silicon carbide (SiC) particles, 3% volume fraction of zirconium (Zr) particulates, and 2% graphite (Gr) particles make up of the volume portion. The mechanical characteristics of produced composite were evaluated by testing. The density of Al7075/SiC/Gr/Zr was 3.24% greater than pure aluminium and 1.42% lower than Al7075, respectively. Hardness increased by 65.94% when compared to pure aluminium and 22.85% when compared to Al7075. With the aid of universal testing equipment, tensile strength was teste and found to be 59.9% higher than pure aluminium and 44.68% higher than Al7075. Impact strength using the Charpy impact tester decreases by 79% with pure aluminium and 75% with Al7075. When compared to pure aluminum, the composite's yield strength is improved by 64.94 percent. The yield strength of the composite is enhanced by 64.94% when compared to pure aluminium and 16.27% when Al7075 is used. It was discovered that the hybrid metal matrix composite's % elongation was lower than that of pure aluminum and Al7075.The inclusion of SiC reduces the ductility of SiC/Gr/Zr reinforcements. The hybrid metal matrix composite exhibits a reduced elongation of 71.94% when compared to pure aluminium and 25% when compared to Al7075. Scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDS) with elemental mapping and x-ray diffraction (XRD) were used to analyze the distribution of reinforcement particles and their presence in the composite. In order to produce hybrid composites with better properties, it was determined that the ultrasonic stir squeeze casting process is favored to traditional stir casting.