Microstructural chracterisation of Al-Si-xTi cast alloys


ZEREN M. , Karakulak E.

MATERIALS SCIENCE AND TECHNOLOGY, vol.25, no.10, pp.1211-1214, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 25 Issue: 10
  • Publication Date: 2009
  • Doi Number: 10.1179/174328408x382190
  • Title of Journal : MATERIALS SCIENCE AND TECHNOLOGY
  • Page Numbers: pp.1211-1214
  • Keywords: Aluminium, Casting, Optical microscopy, Intermetalic, WEAR PROPERTIES, TI ADDITION

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.