Low cycle fatigue and high cycle fatigue of K4750 Ni-based superalloy at 600 degrees C: Analysis of fracture behavior and deformation mechanism
文献类型：期刊论文
| 作者 | Hou, Kunlei1,2; Ou, Meiqiong1; Wang, Min1; Hao, Xianchao1; Ma, Yingche1; Liu, Kui1 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2021-07-13 |
| 卷号 | 820页码:13 |
| 关键词 | Ni-based superalloy Low cycle fatigue High cycle fatigue Fracture analysis Stage I II cracking Deformation structure |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2021.141588 |
| 通讯作者 | Ma, Yingche(ycma@imr.ac.cn) ; Liu, Kui(kliu@imr.ac.cn) |
| 英文摘要 | The fracture behavior and deformation mechanism of a new casting Ni-based superalloy K4750 during straincontrolled low cycle fatigue (LCF) and stress-controlled high cycle fatigue (HCF) at 600 degrees C were investigated. The crack in LCF originated from surface and propagated perpendicular to the loading direction in a striationsassisted Stage II manner. Whereas, the crack in HCF mostly initiated at large-size inclusions and its propagation followed a crystallographic Stage I mode. The microstructures controlling the alloy failure in the two tests were also different. The crack propagation in LCF was accelerated by MC carbides which induced second cracks in front of the primary crack tip. By contrast, the formation of crack in HCF was more affected by the inclusion, grain size and grain orientation. Their presence in unfavorable forms led to premature failure of the alloy and a substantial scatter in the stress-life data. In addition, STEM observation showed that the deformation in LCF occurred on multiple parallel {111} planes with high density of entangled dislocations. The produced slip bands were in close proximity with average spacing below 0.1 mu m. However, the distribution of slip bands in HCF was more isolated with separation up to a few microns. The dislocations in slip bands often traversed the gamma/gamma ' structure in pairs as constrained by the anti-phase boundary in gamma ' phase. The heterogeneous deformation in highly isolated slip bands was deemed to account for the Stage I cracking in HCF, which was discussed in this study. |
| 资助项目 | National Natural Science Foundation of China[52001314] ; Natural Science Foundation of Liaoning Province of China[2020BS008] ; China Postdoctoral Science Foundation[2020M671403] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000668746500002 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province of China ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.imr.ac.cn/handle/321006/159908]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Ma, Yingche; Liu, Kui |
| 作者单位 | 1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hou, Kunlei,Ou, Meiqiong,Wang, Min,et al. Low cycle fatigue and high cycle fatigue of K4750 Ni-based superalloy at 600 degrees C: Analysis of fracture behavior and deformation mechanism[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,820:13. |
| APA | Hou, Kunlei,Ou, Meiqiong,Wang, Min,Hao, Xianchao,Ma, Yingche,&Liu, Kui.(2021).Low cycle fatigue and high cycle fatigue of K4750 Ni-based superalloy at 600 degrees C: Analysis of fracture behavior and deformation mechanism.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,820,13. |
| MLA | Hou, Kunlei,et al."Low cycle fatigue and high cycle fatigue of K4750 Ni-based superalloy at 600 degrees C: Analysis of fracture behavior and deformation mechanism".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 820(2021):13. |
入库方式： OAI收割
来源：金属研究所
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