Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
619444 | Wear | 2010 | 11 Pages |
Abstract
Wear of etched near-eutectic aluminium-silicon alloy slid against a steel ball under ambient is explored. The sliding velocity is kept low (0.01Â m/s) and the nominal contact pressure is varied in a 15-40Â 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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Anirban Mahato, Thomas A. Perry, Vikram Jayaram, S.K. Biswas,