A Study on the Turning Characteristics and Optimization of MOS
p and SiCp-Reinforced Al-Si10Mg Metal Matrix Composites
In the fabrication of parts in auto and aero segments, the use of ceramic (SiCp, Al2O3p) reinforces aluminum alloy found to be increased than that of steel and cast iron. This matrix-reinforced alloy has a high strength to weight ratio along with higher modulus and hardness, the lower thermal coefficient of expansion, and improved tribological properties. To this extent, this paper investigates the turning characteristics and optimization study of newly developed metal matrix composites by the addition of both hard ceramic SiCp and soft stable lubricant molybdenum disulfide (MoS2p). The samples such as Sample 1: AlSi10Mg/3SiCp, Sample 2: AlSi10Mg/2MoS2p and Sample 3: AlSi10Mg/3SiCp /2MoS2p are prepared using the automated stir-casting machine. The particles are observed to be uniformly distributed in the composite. After density and hardness measurement, the samples are subjected to machining, and the responses are optimized by using response surface method. From the optimal points of investigation, the addition of MoS2P along with SiCp in sample 3 prevent the entrapment of hard particles in tool/workpiece interface for both sharp and dull thus tool life is increased 14 min that of 10 min for sample 1. The controlled formation of built-up edge protects the cutting edge and acts as a sacrificial coating also contributed to improving the tool life for sample 3 that of sample 1. Also, the surface morphology of flank face reveals abrasive, and adherence is the primary wear mechanism at the time of machining. Further, the investigation results show that for industrial applications the addition of solid lubricant MOS2p alone to aluminum does not help to improve lubrication properties of the aluminum alloy.