Abstract
Using the good criteria to predict hot tearing is very important during DC casting of aluminium alloys. Among all the hot tearing criteria, a fracture-mechanics based SKK criterion proposed by Suyitno et al. has made considerable improvements in the hot tearing prediction. However, its obtained hot tearing susceptibility (HTS) evolution during solidification is also not completely consistent with real industrial production circumstances, especially when approaching the solidus temperature. In this paper, some further modifications are made based on the SKK criterion to emphasise the important effect of solid bridging/grain coalescence on hot tear propagation. It is proved that the HTS evolution in freezing range predicted by the modified hot tearing criterion is in good agreement with casting practice.
Original language | English |
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Pages (from-to) | 846-854 |
Journal | Materials Science and Technology |
Volume | 32 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2016 |
Keywords
- A modified hot tearing criterion
- Direct chill casting
- Fracture mechanics
- Hot tearing susceptibility