CREEP CHARACTERISTICS OF A Ni BASE SINGLE CRYSTAL SUPERALLOY WITH [011] ORIENTATION
文献类型：期刊论文
| 作者 | Shui Li1,2; Jin Tao1; Hu Zhuangqi1 |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2009-11-11 |
| 卷号 | 45期号:11页码:1349-1355 |
| 关键词 | [011] orientated Ni base single crystal tensile creep dislocation |
| ISSN号 | 0412-1961 |
| 通讯作者 | Shui Li(dcbsy@yahoo.com.cn) |
| 英文摘要 | The creep behavior of a Ni base single crystal superalloy with [011] orientation under three conditions of temperature and stress level has been investigated. Creep deformation of the tested alloy occurs largely through dislocation activity in the gamma matrix channel. Shearing of the gamma' precipitates is observed, while at higher temperature, this does not occur until late in life by means of the passage of superpartial dislocation. At lower temperature (750 degrees C) and high stress level, shearing of the gamma' precipitates is observed in the relatively early creep through the passage of 1/3 < 112 > dislocation, which leaves superlattice stacking faults (SSFs) in the precipitates. The creep behavior is closely related to microstructure evolution, the creep curve at 750 degrees C exhibits higher primary and steady creep rates, and thereby the creep life is shorter. Under the condition of 870 degrees C and 500 MPa, the steady-stage creep does not appear, it is suggested that the creel) life is greatly influenced by the inhomogeneous slip band. At higher temperature and lower stress, such as 980 degrees C and 200 MPa, the alloy has longer creep life and lower steady creep rate. Observation of the dislocation configuration shows that the hexagonal dislocation network appears on the gamma/gamma' interface at the early creep stage, the regular and denser dislocation networks can inhibit dislocation cutting into gamma' phase and enhance the resistance of dislocation movement. In the later stage, gamma' precipitates are sheared by dislocation, which leads to an acceleration of creep rate. |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000272502600012 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.imr.ac.cn/handle/321006/99141]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Shui Li |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110168, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shui Li,Jin Tao,Hu Zhuangqi. CREEP CHARACTERISTICS OF A Ni BASE SINGLE CRYSTAL SUPERALLOY WITH [011] ORIENTATION[J]. ACTA METALLURGICA SINICA,2009,45(11):1349-1355. |
| APA | Shui Li,Jin Tao,&Hu Zhuangqi.(2009).CREEP CHARACTERISTICS OF A Ni BASE SINGLE CRYSTAL SUPERALLOY WITH [011] ORIENTATION.ACTA METALLURGICA SINICA,45(11),1349-1355. |
| MLA | Shui Li,et al."CREEP CHARACTERISTICS OF A Ni BASE SINGLE CRYSTAL SUPERALLOY WITH [011] ORIENTATION".ACTA METALLURGICA SINICA 45.11(2009):1349-1355. |
入库方式： OAI收割
来源：金属研究所
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