Studies on machining behaviour of aluminum 7075 hybrid metal matrix composites

Abstract

Aluminum-based composites have gained significant attention in recent newlineyears due to their enhanced mechanical properties and wide range of newlineapplications. From the literature, it is observed that the fabrication of SiC and newlineB4C reinforced MMCs, for characterization and testing are carried out across newlinethe world. Hybrid MMCs with different weight fraction of reinforcements (SiC newlineand B4C) were fabricated by stir-casting method. Taguchi L27 orthogonal array newlinewith ANOVA was used to optimize machining parameters. The mechanical newlineproperties, such as hardness, tensile strength and wear resistance of the newlinefabricated composites are measured and compared with those of the base newlinematerial. newlineIn this research work, the effects of SiC and B4C reinforcement to Al newline7075 alloy on surface roughness and cutting force during milling are studied in newlineterms of parameters such as cutting speed, feed rate and depth of cut to study newlinetheir effects on the machining performance and surface integrity. Machining newlineforces, roughness of the surface are evaluated to assess the machinability of the newlinecomposites. Additionally, the microstructural studies of the machined surfaces newlineare conducted using Scanning Electron Microscopy (SEM) to investigate the newlinedeformation mechanisms and chip formation during the machining process. newline