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Tribological characteristics of A356 Al alloy-SiC(P) composite discs

Shivamurthy, RC and Surappa, MK (2011) Tribological characteristics of A356 Al alloy-SiC(P) composite discs. In: Wear, 271 (9-10, ). pp. 1946-1950.

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Official URL: http://dx.doi.org/10.1016/j.wear.2011.01.075

Abstract

The dry sliding wear and friction behaviour of A356 Al alloy and its composites containing 10 and 20 vol.% SiC(P) have been studied using pin-on-disc set up. In these tests, A356 Al alloy and its composites are used as disc whereas brake pad was used in the form of pins. Wear tests were carried out at a load of 192 N and the sliding speed was varied from 1 to 5 m/s. Tests were done for a sliding distance of 15 km. The effects of sliding velocity on the wear rate, coefficient of friction and nature of tribolayers formed on discs have been studied. Wear rates of composites as calculated by weight loss method, found to be negative at sliding speed of more than 2 m/s. Worn surfaces of pins and discs have been analyzed using scanning electron microscope. SEM and EDAX analysis of worn surfaces of composite discs showed formation of tribolayers, consisting of mixture of oxides of Al, Si, Cu, Ca, Ba, Mg, and Fe. In these layers, copper and barium content found to be increase with sliding speed in the case of composites. (C) 2011 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: A356 Al alloy;Al MMCs;Brake discs;Brake pad;Tribolayers
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 29 Nov 2011 09:29
Last Modified: 29 Nov 2011 09:29
URI: http://eprints.iisc.ernet.in/id/eprint/42440

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