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Pressure and thermally induced stages of wear in dry sliding of a steel ball against an aluminium-silicon alloy flat

Mahato, Anirban and Perry, Thomas A and Jayaram, Vikram and Biswas, SK (2010) Pressure and thermally induced stages of wear in dry sliding of a steel ball against an aluminium-silicon alloy flat. In: Wear, 268 (9-10). pp. 1080-1090.

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Official URL: http://dx.doi.org/10.1016/j.wear.2010.01.008

Abstract

Wear of etched near-eutectic aluminium silicon alloy slid against a steel ball under ambient is explored. The sliding velocity is kept low (0.01 m/s) and the nominal contact pressure is varied in a 15-40 MPa range. Four stages of wear are identified; ultra mild wear, mild wear, severe wear and post severe oxidative wear. The first transition is controlled by the protrusions of silicon particles, projecting out of the aluminium alloy matrix. Once these protrusions disappear under pressure and sliding, oxidation and bulk energy dissipation mechanisms take over to institute transitions to other stages of wear. The phenomenological characteristics of wear stages are explored using a variety of techniques including nanoindentation, focused ion beam milling, electron microscopy, X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS) and optical interferometry. (c) 2010 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Sliding wear;Non-ferrous metals;Electron microscopy; Internal combustion engines;Nanoindentation
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 09 Jun 2010 04:32
Last Modified: 19 Sep 2010 06:00
URI: http://eprints.iisc.ernet.in/id/eprint/27237

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