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1 International Journal of Applied Mechanics and Engineering

1 2002

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Wear properties of 10% sub-micron Al2O3/6061 aluminium alloy composite

Al-Qutub A. M., Allam I. M., Qureshi T. W.

International Journal of Applied Mechanics and Engineering

2002

Vol. 7, Spec. is

329-334

The effect of reinforcing 6061 Aluminum alloy with 10% sub-micron Al2O3 by volume on the wear properties was studied using a pin-on-disc type tribometer as well as Vickers micro-Hardness tester. The dry wear test, for the alloy and the composite, was performed at room temperature under different loads with a relative speed of 1 m/s. The pin was either made of the 6061 alloy or the composite. The counter face was made of AISI 4140 tool steel disc. Three wear mechanisms were observed: abrasion, surface fatigue, and adhesion. Almost all wear mechanisms were observed in combination under different loads. However, abrasion was dominant at low loads, delamination wear was dominant at higher loads and adhesion was more clear at extreme loads. The presence of sub-micron Al2O3 particles in the composite increased both hardness and wear resistance. Depending on the load, the wear resistance increased by 20% to 106% with the ceramic reinforcement. Also, the transition load, from mild to sever wear, was increased due to the addition of the ceramic.