EFFECT OF DEGASSING AND GRAIN REFINEMENT ON HOT TEARING TENDENCY IN Al8Si3Cu ALLOY


Uludag M., Cetin R., Dışpınar D. , Tiryakioglu M.

INTERNATIONAL JOURNAL OF METALCASTING, vol.12, no.3, pp.589-595, 2018 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 12 Issue: 3
  • Publication Date: 2018
  • Doi Number: 10.1007/s40962-017-0197-9
  • Title of Journal : INTERNATIONAL JOURNAL OF METALCASTING
  • Page Numbers: pp.589-595

Abstract

The effect of melt quality on hot tearing susceptibility of Al8Si3Cu alloy was examined under six different conditions, by using a traditional T-shaped mold. Grain refinement was carried out by two different modifiers: AlTi5B1 and Al3B. For each test, samples were cast before and after degassing of melt. Therefore, a new hot tearing tendency index was developed by both bifilm calculations and porosity that occurred in the middle of T-zone of casting parts. Results indicated that hot tearing of cast aluminum alloys was a complex phenomenon, and bifilms play a major role, especially by compensating for shrinkage and consequently contributing to the inconsistencies in results.