Formation Mechanism of Fusion Zone in Growth of Single Crystal Superalloy with Low-Segregated Heterogeneous Seed
文献类型：期刊论文
| 作者 | Guo Jing1,3; Li Jinguo3; Liu Jide3; Huang Ju2,3; Meng Xiangbin3; Sun Xiaofeng3 |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2018-03-11 |
| 卷号 | 54期号:3页码:419-427 |
| 关键词 | Ni-based single crystal superalloy seed solidification interface fusion zone |
| ISSN号 | 0412-1961 |
| DOI | 10.11900/0412.1961.2017.00144 |
| 通讯作者 | Li Jinguo(jgli@imr.ac.cn) |
| 英文摘要 | Seeding technique is a promising method for growing single crystal superalloy blade. However, sometimes stray grains nucleate in the transformation process of single crystal structure from a seed, which always cause failure of single crystal growth. In order to obtain single crystal with high perfection structure, Ni-based single crystal superalloy was prepared with low-segregated seeds by high rate solidification (HRS) method in the dual heating zone furnace. The melt-back zones of seeds were investigated systematically, and the results showed that a fusion zone without microsegregation exists in front of the melt-back equilibrium interface of seeds, in which solidification interface transited from planar to cellular. Further experiments showed that increasing the W content of seeds or the solidification rate can both accelerate the whole non-steady transition process and make fusion zone shrink. Compared with the traditional seeding method, the low segregated heterogeneous seeding technique can increase the casting yield by avoiding the nucleation of stray grains in the fusion zone, which caused by the pinched-off secondary dendrites and constitutional undercooling. |
| 资助项目 | National Natural Science Foundation of China[51331005] ; National Natural Science Foundation of China[U1508213] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000427121400008 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/127518]  |
| 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 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo Jing,Li Jinguo,Liu Jide,et al. Formation Mechanism of Fusion Zone in Growth of Single Crystal Superalloy with Low-Segregated Heterogeneous Seed[J]. ACTA METALLURGICA SINICA,2018,54(3):419-427. |
| APA | Guo Jing,Li Jinguo,Liu Jide,Huang Ju,Meng Xiangbin,&Sun Xiaofeng.(2018).Formation Mechanism of Fusion Zone in Growth of Single Crystal Superalloy with Low-Segregated Heterogeneous Seed.ACTA METALLURGICA SINICA,54(3),419-427. |
| MLA | Guo Jing,et al."Formation Mechanism of Fusion Zone in Growth of Single Crystal Superalloy with Low-Segregated Heterogeneous Seed".ACTA METALLURGICA SINICA 54.3(2018):419-427. |
入库方式： OAI收割
来源：金属研究所
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