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, cilt.12, sa.3, ss.589-595, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 12 Konu: 3
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/s40962-017-0197-9
  • Dergi Adı: INTERNATIONAL JOURNAL OF METALCASTING
  • Sayfa Sayıları: ss.589-595

Özet

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.