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Advances in Tribology
Volume 2014, Article ID 273738, 8 pages
Research Article

Characterization and Empirical Modelling of Sliding Wear on Sintered Aluminium-Graphite Composites

Department of Mechanical Engineering, Pondicherry Engineering College, Puducherry 605014, India

Received 5 June 2013; Revised 14 December 2013; Accepted 11 February 2014; Published 30 March 2014

Academic Editor: S. Aravindan

Copyright © 2014 Amrishraj Doraisamy and Senthilvelan Thiagarajan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Aluminium-graphite composites were synthesized using powder metallurgy route. Graphite was added as reinforcement in the range of 0, 3, and 6 weight % and composites were prepared by P/M. Microstructural analysis of the newly synthesized composites was carried out using SEM. The hardness of the composites was studied using Vickers microhardness tester, by applying a load of 1 kg for 5 sec. Also the amount of porosity was determined. Further the wear test was conducted on the sintered specimens using pin-on-disc wear apparatus according to ASTM-G99 standards. A regression model was developed to predict the wear rate of the specimen. Then the worn images were studied using SEM based on response surface methodology in order to understand the various wear mechanisms involved. The study revealed that mild wear, oxidational wear, plowing, cutting, and plastic deformation are the main mechanisms responsible for causing the wear.