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OPTIMAL MACHINING CHARACTERISTICS OFMETAL MATRIX COMPOSITES BY POWDERMETALLURGY PROCESS

Abstract

Aluminum Metal Matrix composites founds several applications in automobile, aerospace and otherengineering application due to its mechanical and tribological properties. To improve wear resistance and mechanicalproperties has led to design and selection of newer variants of the composite.The present investigation deal with thestudy of wear behaviour of Al-Sic-Gr MMCs for varying reinforcement content, applied load, sliding velocity.Aluminium MMCs reinforced with three different percentages of reinforcement 2, 4, 6,8% wt. Sic and 2% wt.grprepared by stir casting method. Wear test was performed by using “pin on disk” apparatus. A plan of experimentbased on L9 Taguchi orthogonal array is used to acquire the wear data. An analysis of variance is employed toinvestigate the influence of three controlling parameters, Sic content, Normal load, sliding velocity on dry sliding wearof the composites. It is observed that Sic content, sliding velocity and normal load significantly affect the dry slidingwear. The optimal combination of the three controlling parameters is also obtained for minimum wear.Keywords: Metal matrix composites; Al-Sic-Mg; Stir casting; Wear; Optimization

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Department of Civil Engineering, Amity University Haryana,




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