COMPETITIVE GROWTH IN BI-CRYSTAL OF Ni-BASED SUPERALLOYS DURING DIRECTIONAL SOLIDIFICATION
文献类型：期刊论文
| 作者 | Lu Qi; Li Jinguo; Jin Tao; Zhou Yizhou; Sun Xiaofeng; Hu Zhuangqi |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2011-06-11 |
| 卷号 | 47期号:6页码:641-648 |
| 关键词 | superalloy directional solidification competitive growth dendrite growth |
| ISSN号 | 0412-1961 |
| DOI | 10.3724/SP.J.1037.2010.00697 |
| 通讯作者 | Li Jinguo(jgli@imr.ac.cn) |
| 英文摘要 | Single crystal nickel-based superalloys, which offer improved creep-rupture, fatigue, oxidation and coating properties, have been widely applied in turbine blades and vanes. In general, the single crystal structure is produced through competitive grain growth by directional solidification technology. However, in actual directional solidification process, the orientations of the primary and secondary dendrites are random due to the randomness of the grain nucleation. Therefore, the actual competitive grain growth during directional solidification is a three-dimensional process. However the related literatures are fewer. In the present study, an experimental study had been conducted to investigate the three-dimensional competitive grain growth behavior under different withdrawal velocities by the bi-crystal samples with special orientation relationships. The results showed that the whole sample with bi-crystal microstructure could be obtained when the two seeds were with the same primary dendrites orientation paralleled to the heat flow direction but different orientations of the secondary dendrites. And the withdrawal velocity had little influence on the competitive grain growth in this disposition relationship. However, only the favorably oriented grain could be obtained when the two seeds were with the non-coplanar primary dendrites and a group of secondary dendrites with the same orientation. The favorably oriented grain overgrew the misaligned grain in a heliciform way. And the overgrowth velocity was in direct proportion to the withdrawal velocity. |
| 资助项目 | National Basic Research Program of China[2010CB631206] ; National Natural Science Foundation of China[50931004] ; National Natural Science Foundation of China[U1037601] ; National Natural Science Foundation of China[50971124] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000292787700001 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Basic Research Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/104901]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Li Jinguo |
| 作者单位 | Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu Qi,Li Jinguo,Jin Tao,et al. COMPETITIVE GROWTH IN BI-CRYSTAL OF Ni-BASED SUPERALLOYS DURING DIRECTIONAL SOLIDIFICATION[J]. ACTA METALLURGICA SINICA,2011,47(6):641-648. |
| APA | Lu Qi,Li Jinguo,Jin Tao,Zhou Yizhou,Sun Xiaofeng,&Hu Zhuangqi.(2011).COMPETITIVE GROWTH IN BI-CRYSTAL OF Ni-BASED SUPERALLOYS DURING DIRECTIONAL SOLIDIFICATION.ACTA METALLURGICA SINICA,47(6),641-648. |
| MLA | Lu Qi,et al."COMPETITIVE GROWTH IN BI-CRYSTAL OF Ni-BASED SUPERALLOYS DURING DIRECTIONAL SOLIDIFICATION".ACTA METALLURGICA SINICA 47.6(2011):641-648. |
入库方式： OAI收割
来源：金属研究所
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