Modeling and Analysis of Machining Parameters by Wavelet Transformation of Stir Cast Aluminium Silicon Alloy Metal Matrix Composite with Silicon Metal Matrix Composite with Silicon Carbide Particulate SICP

Abstract

Metal matrix composites (MMC) are extensively used new class of material, which is characterized by greater strength, light in weight and higher wear resistant than those of conventional materials. Aluminium metal matrix composite have high strength to weight ratio, it has a wide application in the field of aerospace and automobile industrial applications. The machining of MMC s pose high degree of vibration/force and chatter during machining affecting the accuracy and surface finish of the machined components. These factors limits the usage of MMC s in industrial sectors. Hence optimization of machining parameters and tool condition monitoring are important to assess the machinability of the composites. In the first phase of the study, aluminium metal matrix composite was fabricated by stir casting method using AA413 alloywhich is near eutectic composition of aluminium silicon alloy reinforced with 0, 4, 8 and 12 weight percentage. It is conventionally used in the automobile application as a piston material. Microstructural characterization of the MMC have been carried out by optical microscope and scanning electron microscope. Micrograph reveals that fairly uniform distribution of SiC particulates throughout the AA413 matrix with the lower porosity. Elemental mapping of AA413 reinforced with SiC composite was carried out to infer the elemental composition. Energy dispersive X-Ray analysis (EDS) was used to confirm the elements present in the composite. Tensile test and Vickers Hardness test performed on the composite showed an increasing trend with increase in the wt% SiC reinforcement. Pin on disc machine was used to study the abrasive wear.