Study of cutting forces in machining of magnesium composite by response surface methodology

• Main Authors: M. Saravanakumar, N. Natarajan, V. Krishnaraj
• Format: Article
• Language: English
• Published: Applied Science Innovations Private Limited 2015-01-01
• Series: Carbon: Science and Technology
• Subjects: Metal Matrix composites
• Online Access: http://www.applied-science-innovations.com/cst-web-site/CST-7-1-2015/CST%20-%20108%20-%20FINAL.pdf

Metal Matrix composites (MMCs) has many excellent engineering properties like good strength to weight ratio, stiffness and increased wear resistance etc., These properties are the main requirements in aerospace, automotive industries and hence the MMCs are extensively used in these industries. This paper presents the detailed experimental study on cutting forces and surface roughness aspects in turning of 5% Graphite reinforced AZ91D Magnesium alloy metal matrix composite (AZ91D Magnesium alloy matrix + 5 % Graphite reinforcement). The stir casting process under inert atmosphere is followed for synthesis of the composite. The turning process is followed using Tungsten carbide cutting tool, in a lathe. The effect of machining parameters viz., cutting speed, feed rate and depth of cut, on the cutting forces and surface roughness (Ra) achieved during the machining are analysed and modelled through the response surface methodology (RSM). Study of effect of machining parameters and their interactions are carried out by using the surface, contour plots of RSM. The experimental result shows that the most significant machining parameter affecting surface roughness and cutting forces is cutting speed. The experimental results and predicted values are observed as in good agreement.