International Journal of Applied Engineering Research ISSN 0973-4562 Volume 9, Number 23 (2014) pp. 19279-19285 © Research India Publications http://www.ripublication.com Paper Code: 28005 - IJAER An Experimental Investigation of Dry Sliding Wear Behaviour on Phosphor Bronze/WS 2 Particle Reinforced Composites * Sangaravadivel P, Natarajan N, Krishnaraj V and Rajalingam S * Department of Mechanical Engineering, Bannari Amman Institute of Technology, Sathyamangalam, Tamilnadu, India- 638 401 shankaran.1144@gmail.com Abstract In this work, phosphor bronze alloy composite reinforced with tungsten disulfide (WS 2 ) particles were fabricated by stir casting technique. The sliding wear behaviour of WS 2 particle reinforced composites for different weight percentage of reinforcement has been investigated in unlubricated conditions using pin-on-disk tribometer for various loads and speeds and the results were compared with unreinforced phosphor bronze alloy. The experimental result shows that the wear rate increases with increase in load and sliding speed. The wear rate of the composite specimens decreases for the increase in amount of tungsten disulfide which is lower than that of phosphor bronze alloy. It was observed that the transition phenomenon occurs from mild to severe wear at certain load. The inclusion of tungsten disulfide particles in bronze matrix material improves the tribological properties. The microstructures of the fabricated specimens were examined by SEM (Scanning Electron Microscope) and which shows the fine distribution of reinforcement in the bronze matrix. Keywords: Metal Matrix Composites, Stir casting, Sliding wear, Scanning Electron Microscope I. Introduction Phosphor bronze is the typical copper based alloy in which the addition of phosphor helps to increase the stiffness and wear resistance of the base metal. It exhibits good corrosion resistance, cold workability; good machinability and fatigue resistance which made it suitable for wide range of engineering applications in severe operating conditions such as bearings, springs, worm wheel, fasteners etc [1]. Since, particle reinforced composites revealed better plastic forming capability than that of the