MATERIALS SCIENCE AND TECHNOLOGY, vol.25, no.10, pp.1211-1214, 2009 (SCI-Expanded)
The present paper reports the existence and morphology of intermetallic particles in Al-Si-xTi cast alloys. Near eutectic Al-Si alloys with 0, 0.1, 1, 2, and 5% Ti have been utilised for this purpose. Metallographic observations were made by the combination of an optical microscope and a scanning electron microscope. Wear tests were performed in a pin on disc tribometer under dry sliding conditions. The addition of Ti to the Al-Si alloys led to the precipitation of TiAlSi intermetallic phase. By increasing Ti content, hardness increases due to increasing volume fraction of relatively hard intermetallics.