EFFECT OF GRIT SIZE AND ABRASIVE TYPE ON SURFACE FINISH OF A MACHINED AL-SICP MMC
Keywords:
Metal Matrix Composites, Machining, Grinding, Surface FinishAbstract
Metal-matrix composites are a relatively new range of materials possessing several characteristics that make them useful in situations where low weight, high strength, high stiffness, and an ability to operate at elevated temperatures are required. Practical considerations for machining MMCp include selection of the cutting speeds, type of grinding wheel and surface roughness. This paper presents results from an ongoing investigation into the factors affecting the finish machining of an Al/SiC MMC. Diamond grinding wheels were used to machine an Al-SiCp (30 vol%) metal-matrix composite. The surface finish is significantly varying based on the coarse or finer grit grinding wheels. The effect of abrasive type on surface finish also studied. It was found that good surface finish can be achieved in terms of lower order grinding force components and low AE energy release. The performance of the different grit size diamond wheels and different abrasive wheels are compared.
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