Heat Treatment and Wear Characteristics of Al2O3 and TiC Particulate Reinforced AA6063 Al Alloy Hybrid Composites

[+] Author and Article Information
M. Abdel Aziz, Z. I. Zaki

 Central Metallurgical Research and Development Institute (CMRDI), Helwan, Cairo, Egypt

T. S. Mahmoud, A. M. Gaafer

Mechanical Engineering Department, Faculty of Engineering,  Banha University, Cairo, Egypt

J. Tribol 128(4), 891-894 (Jun 07, 2006) (4 pages) doi:10.1115/1.2345416 History: Received August 03, 2005; Revised June 07, 2006

In this article, the heat treatment and dry sliding wear behavior of Al-based AA6063 alloy reinforced with both TiC and Al2O3 ceramic particles were studied. The particles were synthesized by self-propagating high temperature synthesis (SHS) technique. The prepared composite alloy contains 5vol.%Al2O3 and 5vol.% TiC particles. The composite alloy was prepared by vortex method. To attain the peak hardness values of the alloys, age hardening behavior of the monolithic alloy and also the composite alloy was investigated. The wear tests were performed at room temperature using a pin-on-disk type apparatus. The results showed that the addition of TiC and Al2O3 particles increases the hardness of the AA6063 Al alloy and at the same time accelerates the aging kinetics. The sliding wear properties of AA6063 Al alloy were significantly improved by the addition of TiC and Al2O3 particles.

Copyright © 2006 by American Society of Mechanical Engineers
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Figure 3

Results of weight loss versus sliding distance for the unreinforced AA6063 and the AA6063∕Al2O3∕TiC composite under various loads (sliding velocity of 0.4ms−1)

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Figure 4

SEM photographs of the worn surfaces: (a,c) monolithic alloy at 15N, (b,d) composite alloy at 15N (v=0.4m∕s and sliding distance=150m)

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Figure 2

Age hardening curves of Al AA6063 and Al AA6063∕Al2O3∕TiC composite alloys

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Figure 1

Optical micrograph showing a typical microstructure of the Al 6063∕Al2O3∕TiC composite



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