摘要
The bi-crystal competitive growth in a nickel-based superalloy AM3 during the cell/dendrite directional solidification was investigated using seed crystals. The results show that the relative position of <001> orientations in bi-crystal has a great influence on the competitive growth. For bi-crystal with <001> orientations grown in different planes, the competitive growth is dependent on physical blocking between the cell/dendrites. The grain playing dominant blocking at the grain boundary is survived during the competitive growth. For bi-crystal with <001> orientations grown in the same plane, the two seed crystals with their preferred growth directions are far away from that of the maximum temperature gradient in a divergent way, and a stray grain may appear and grow as a single crystal.
| 源语言 | 英语 |
|---|---|
| 页（从-至） | 1622-1626 |
| 页数 | 5 |
| 期刊 | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| 卷 | 42 |
| 期 | 8 |
| 出版状态 | 已出版 - 8月 2013 |