High cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ951
文献类型：期刊论文
| 作者 | Z. K. Chu ; J. J. Yu ; X. F. Sun ; H. R. Guan ; Z. Q. Hu |
| 刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 2008 |
| 卷号 | 496期号:1-2页码:355-361 |
| 关键词 | Ni-base superalloy High cycle fatigue Notch sensitivity Slip bands single-crystal superalloy crack-growth temperature-dependence elevated-temperatures orientation |
| ISSN号 | 0921-5093 |
| 中文摘要 | Smooth and notched specimens of a directionally solidified Ni-base superalloy DZ951 alloy were subjected to high cycle fatigue (HCF) loading at temperatures of 700 and 900 degrees C in ambient atmosphere. The results show that the fatigue strength at 700 degrees C is higher than that at 900 degrees C while the notch sensitivity at 900 degrees C is lower than that at 700 degrees C. As for the smooth specimens, the fracture mode exhibits strong temperature dependence. At 700 degrees C, only stage I crack propagation can be observed while both stage I and stage 11 crack Propagation can be found at 900 degrees C. A correlation exists between the crack propagation mode and deformation mode. The fracture mode observed at 700 degrees C is associated with single planar slip while that at 900 degrees C is associated with the combination action of planar slip, cross-slip and climb of dislocations. The notch effect plays a significant role in crack initiation and propagation process. The multiple primary cracks initiate at the surface for the notched specimens while single primary crack initiates at the carbide/matrix interface for the smooth specimens. (C) 2008 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32693]  |
| 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 | Z. K. Chu,J. J. Yu,X. F. Sun,et al. High cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ951[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2008,496(1-2):355-361. |
| APA | Z. K. Chu,J. J. Yu,X. F. Sun,H. R. Guan,&Z. Q. Hu.(2008).High cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ951.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,496(1-2),355-361. |
| MLA | Z. K. Chu,et al."High cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ951".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 496.1-2(2008):355-361. |
入库方式： OAI收割
来源：金属研究所
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