An Investigation on Workpiece Reinforcement Percentage on Volume of Sic Particles on A356 Alloy

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An Investigation on workpiece reinforcement percentage on volume of SiC particles on A356 alloy

S.Madhavan1*, Deepak2, D.Hariprasad3, N.Muthukrishnan4

1,2,3,4 Department of Mechanical Engineering, Sri Venkateswara college of Engineering, Pennalur, Sriperumbudur – 602 105, Tamil Nadu, India

1*Corresponding author, Phone: 09543193510/ (044)26572970, e-mail: madhavan.tes@gmail.com

Abstract

Aluminum silicon carbide Metal Matrix Composites (Al-MMC) are widely used in aeronautical and automobile industries due to their excellent mechanical and physical properties. However machining this composites find difficult because of the reinforcement particles. Tools wear more quickly and reduce the life of the tool. This paper presents the experimental investigation on machining two different A356 matrix metal reinforced with 10 % and 20 % by weight of Silicon carbide (SiCp) particles is fabricated in house by stir casting method. Fabricated samples are turned on medium duty lathe with Poly crystalline Diamond (PCD) insert of 1600 grade at various cutting conditions. Parameters such as power consumed by main spindle, machined surface roughness and tool wear are studied and influence of SiC particles percentage on tool wear also discussed. Scanning Electron Microscope (SEM) images support the result. It is evident that, tool wear is strongly dependent on reinforcement percentage.
Key words: A356 Alloy, PCD, Power consumed, Surface roughness, SiC percentage
1. Introduction

Metallic matrix composites have found considerable applications in aerospace, automotive and electronic industries [1] because of their improved strength, stiffness and increased wear resistance over unreinforced alloys [2]. However, the final conversion of these composites in to engineering products is always associated with machining, either by turning or by milling. A…...

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