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In the present investigation an attempt is made to evaluate the effect of certain cutting variables on surface roughness in plain turning of aluminium alloy (LM6) -SiCp metal matrix composites under dry cutting condition. Cutting velocity, depth of cut and weight percentage of SiC P in the metal matrix are selected as the influencing parameters. The experiments are conducted based on three factors, two level and central composite face centered design (CCD) with full factorial and the results are analyzed according to the principle of Response Surface Methodology. The equation to the response surface is developed using the design of experiments features of the commercial software package MINITAB-14. The goodness of fit of the regression model is examined using the Analysis of Variance (ANOVA) and the F-ratio test. The contour plots of the process parameters revel that the best surface finish is associated with the lowest level of depth of cut, the lowest level of the weight percentage of SiCp in the metal matrix and the highest level of cutting velocity. These conclusions are further verified through eight confirmatory experiments and with the help of the sensitivity analysis.

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The present paper examines the deformation behavior of solid cylinders of an aluminium alloy metal matrix composite (MMC) undergoing axial compression in a Universal Testing Machine under dry condition. The composite was prepared by the stir casting method from LM6 aluminium alloy using silicon carbide particles (SiC) as reinforcing agent. The effect of weight percentage of silicon carbide on microstructure, hardness and upsetting load is studied. The friction factor at die metal interface is evaluated by ring compression tests and its effect on non-uniform deformation is investigated. The experimental results are finally compared with those obtained by FEM simulation.