Microstructural chracterisation of Al-Si-xTi cast alloys

Authors: Zeren, M.1; Karakulak, E.2

Source: Materials Science and Technology, Volume 25, Number 10, October 2009 , pp. 1211-1214(4)

Publisher: Maney Publishing

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Abstract:

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.

Keywords: ALUMINIUM; CASTING; OPTICAL MICROSCOPY; INTERMETALIC

Document Type: Research article

DOI: 10.1179/174328408X382190

Affiliations: 1: Department of Metallurgy & Materials Engineering, Kocaeli University, Turkey 2: Metallurgical and Materials Engineering, Kocaeli University, Umuttepe Kampusu Muh. Fak., Kocaeli 41380, Turkey

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