High cycle fatigue behavior of a single crystal superalloy at elevated temperatures
文献类型：期刊论文
| 作者 | Liu, Y.; Yu, J. J.; Xu, Y.; Sun, X. F.; Guan, H. R.; Hu, Z. Q. |
| 刊名 | Materials science and engineering a-structural materials properties microstructure and processing
 |
| 出版日期 | 2007-04-25 |
| 卷号 | 454页码:357-366 |
| 关键词 | Single crystal High-cycle fatigue Notch sensitivity Dislocation networks Slip bands |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2006.11.045 |
| 通讯作者 | Liu, y.(yuanliu@imr.ac.cn) |
| 英文摘要 | Smooth and notched specimens of single crystal (sc) superalloy srr99 with [001] orientation were subjected to high-cycle fatigue (hcf) loading at temperatures of 700 degrees c, 760 degrees c, 850 degrees c and 900 degrees c in ambient atmosphere. the results demonstrate that the fatigue strength of smooth specimens reached the maximum at 760 degrees c and decreased with increasing temperature. the alloy became more notching sensitive with increase of temperature while the notch sensitivity declined at 900 degrees c. analysis on fracture surfaces of both smooth and notched specimen shows that a transition from ductile fracture at lower temperatures to cleavage mode at higher temperatures were observed. evolution of the microstructure was investigated by sem and tem observation. with the process of cyclic plastic deformation at elevated temperatures, the primary cuboidal gamma' precipitates tended to dissolve into the matrix channels, meanwhile a larger number of secondary gamma' particles were formed in the gamma matrix. in addition, different types of dislocation structures were developed during the cyclic deformation, which would have a significant impact on the fatigue life of the material. (c) 2006 elsevier b.v. all rights reserved. |
| WOS关键词 | CRACK-GROWTH ; ORIENTATION ; DEPENDENCE ; STRENGTH ; FRACTURE ; ALLOY ; CREEP |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS类目 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000245898500049 |
| 出版者 | ELSEVIER SCIENCE SA |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2381616 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Liu, Y. |
| 作者单位 | 1.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Y.,Yu, J. J.,Xu, Y.,et al. High cycle fatigue behavior of a single crystal superalloy at elevated temperatures[J]. Materials science and engineering a-structural materials properties microstructure and processing,2007,454:357-366. |
| APA | Liu, Y.,Yu, J. J.,Xu, Y.,Sun, X. F.,Guan, H. R.,&Hu, Z. Q..(2007).High cycle fatigue behavior of a single crystal superalloy at elevated temperatures.Materials science and engineering a-structural materials properties microstructure and processing,454,357-366. |
| MLA | Liu, Y.,et al."High cycle fatigue behavior of a single crystal superalloy at elevated temperatures".Materials science and engineering a-structural materials properties microstructure and processing 454(2007):357-366. |
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来源：中国科学院大学
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