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Viswanatha B.M.,Kalpataru Institute of Technology Tiptur | Kumar M.P.,Bapuji Institute of Engineering and Technology Davanagere | Basavarajappa S.,Davangere University | Kiran T.S.,Kalpataru Institute of Technology Tiptur
Tribology in Industry | Year: 2014

The present investigation shows the wear behaviour of as-cast and heat treated, A356 aluminium alloy reinforced with SiC and Graphite particles subjected to different ageing durations. The liquid metallurgy technique was used to fabricate the composites. The reinforcement content was varied from 0 to 9 % by weight in steps of 3 % of SiCp and fixed quantity of 3 % by weight of graphite particles. The castings were machined to ASTM standard and T6 heat treatment was carried out at 540 °C ± 5 for 12 hrs and quenched at 60 °C in water. All the specimens were artificially aged at different durations of 3, 6, 9 and 12 hrs at a temperature of155 °C ± 5. The wear tests were performed for alloy and composites by varying load, speed and sliding distance for both aged and as-cast conditions by using a pin on disc wear testing machine. The results reveal that the wear rate of composites was less than that of non-reinforced alloy. It was found that the wear resistances of A356-9 SiCp-3 Gr composites aged at 9 hrs showed better wear resistance compared with other samples. However in both aged and as-cast materials, the wear rate was increased with the increase in load, speed and sliding distance. The tested samples were examined and analyzed using Scanning Electron Microscope (SEM) and X-ray energy-dispersive spectrometry (EDX). © 2014 Published by Faculty of Engineering.

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