TitleEffect of T6 Heat Treatment on Wear Properties of AlN Reinforced Al-Si alloy Composites
SourceRTC 045
AuthorM.N Wahab, M.J. Ghazali and A.R. Daud


Dry wear properties of Aluminum nitride (AlN) reinforced aluminum silicon alloy (Al-Si) studied by using a pin-on-disc configuration tester. In this work different weight percentage (wt %) of 0, 2, 5, 7 and 10 of AlN was added in the metal matrix composites. The composites were prepared by a stir casting process which was then aged with a T6 condition prior to the wear test. Detailed analyses on the morphologies were conducted using a scanning electron microscope (SEM) with the aid of an energy dispersive x-ray analyser (EDX). It was clearly observed that the hardness improved from 70 to 240% for the aged samples compared to un-aged samples. The specific wear rate or the K’ valued was 2.06 x 10-4 mm3N -1m -1 and 1.35 x 10-4 mm3N -1m -1 for Al-Si alloy and Al-Si/10%AlN respectively and improved to 70% and 60% respectively after the heat treatment. A surface investigation by the scanning electron microscope (SEM) revealed that thick mixed mechanical layers (MML) with wear delamination occurred on the Al-Si alloys while thin layers (MML) were observed in the AlN reinforced composites. 


RTC 045