Abstract
The experiments on the cellular/dendritic selection of Al-0.53wt%Zn alloy at medium growth rate during unidirectional solidification were performed. The cellular/dendritic and dendritic/cellular transition of the Al-Zn alloy were observed. No dendrites appear within the whole growth rate range and full cellular growth is observed. The cellular/dendritic transition appears when the growth rate is in the range of 30-45 μm/s, which agrees with the predicted one by Trivedi model. The dendritic/cellular transition appears when the growth rate is in the range of 600-700 μ/s at temperature gradient of 145 K/min. If the freeze range of the alloy is sufficiently small and the temperature gradient is high enough during directional solidification, the dendritic/cellular transition velocity will be larger than cellular/dendritic one.
| Original language | English |
|---|---|
| Pages (from-to) | 52-55 |
| Number of pages | 4 |
| Journal | Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University |
| Volume | 18 |
| Issue number | 1 |
| State | Published - Feb 2000 |