Mechanism of competitive growth during directional solidification of a nickel-base superalloy in a three-dimensional reference frame
文献类型：期刊论文
| 作者 | X. B. Meng ; Q. Lu ; X. L. Zhang ; J. G. Li ; Z. Q. Chen ; Y. H. Wang ; Y. Z. Zhou ; T. Jin ; X. F. Sun ; Z. Q. Hu |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2012 |
| 卷号 | 60期号:9页码:3965-3975 |
| 关键词 | Directional solidification Competitive growth Non-uniplanar case 3-D reference frame Rotation single-crystal superalloys low-angle boundaries seed melt-back grain structures prediction orientation castings model |
| ISSN号 | 1359-6454 |
| 中文摘要 | The microstructure evolution of bicrystal samples during directional solidification was studied, both by simulation and experiment, to explore the mechanism of competitive growth. A new orientation relationship of bicrystal samples, the non-uniplanar case, is proposed, which expands the orientation relationship of bicrystal samples from two dimensions to three dimensions. The results show that, in the non-uniplanar case, the favorably oriented grain overgrows the unfavorably oriented grain by developing new dendrites in the lateral gap where the primary dendrites of the unfavorably oriented grain diverge from the mold wall. During this process, the grain boundary is found to move in two directions, one perpendicular to the grain boundary and the other parallel to the grain boundary. To characterize the state of dendrite growth, a three-dimensional reference frame is constructed. In this reference frame, the mechanism of competitive growth can be categorized as a converging case, a non-uniplanar case and a diverging case. Furthermore, the simulation results are in good agreement with the experimental findings. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60161]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | X. B. Meng,Q. Lu,X. L. Zhang,et al. Mechanism of competitive growth during directional solidification of a nickel-base superalloy in a three-dimensional reference frame[J]. Acta Materialia,2012,60(9):3965-3975. |
| APA | X. B. Meng.,Q. Lu.,X. L. Zhang.,J. G. Li.,Z. Q. Chen.,...&Z. Q. Hu.(2012).Mechanism of competitive growth during directional solidification of a nickel-base superalloy in a three-dimensional reference frame.Acta Materialia,60(9),3965-3975. |
| MLA | X. B. Meng,et al."Mechanism of competitive growth during directional solidification of a nickel-base superalloy in a three-dimensional reference frame".Acta Materialia 60.9(2012):3965-3975. |
入库方式： OAI收割
来源：金属研究所
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