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Dry sliding wear behaviour of al-4si-4mg alloys by addition of cerium

Anasyida A.S., and Daud A.R., and Ghazali M.J., (2009) Dry sliding wear behaviour of al-4si-4mg alloys by addition of cerium. International Journal of Mechanical and Materials Engineering, 4 (2). pp. 127-130. ISSN 1823-0334

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Affiliations

Universiti Kebangsaan Malaysia, Faculty of Science and Technology, School of Applied Physics
Universiti Kebangsaan Malaysia, Faculty of Science and Technology, School of Applied Physics
Universiti Kebangsaan Malaysia, Dept. of Mechanical and Materials Engineering

Abstract

The effect of cerium addition on wear behaviour of as-cast Al-4Si-4Mg alloys has been studied. Dry sliding wear tests were performed against a hardened carbon steel (Fe-2.3%Cr-0.9%C) using a pin-on-disc configuration with fixed sliding speed of 1 m/s and a range of load 10 N, 30 N and 50 N at room temperature (25oC). Morphologies of both worn surfaces and collected debris were characterised by a scanning electron microscope (SEM) equipped with an energy dispersive X-ray spectrometer (EDX). It was revealed that 1 - 5 wt% of cerium addition resulted in the formation of intermetallic phase Al-Ce and Al-Si-Ce. The increase of cerium content in the alloy led to higher wear resistance behaviour for as-cast alloys. Formation of craters and localised plastic deformation were observed on the worn surface of the alloys, resulting fine particulate and sheet-like wear debris. The change in morphology of the wear debris was also found consistent with the change in worn surface appearance.

Item Type:Journal
Keywords:Wear resistance, Cerium, Friction, Aluminium alloy, Worn surface.
Subjects:T Technology, Engineering
ID Code:10279

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