| Effects of Crystal Orientations on the Low-Cycle Fatigue of a Single-Crystal Nickel-Based Superalloy at 980 degrees C | |
| Liu, Liu1,2; Meng, Jie2; Liu, Jin-Lai2; Zhang, Hai-Feng1,3; Sun, Xu-Dong1; Zhou, Yi-Zhou2 | |
| Corresponding Author | Meng, Jie(jmeng@imr.ac.cn) |
| 2019-03-01 | |
| Source Publication | ACTA METALLURGICA SINICA-ENGLISH LETTERS
 |
| ISSN | 1006-7191 |
| Volume | 32Issue:3Pages:381-390 |
| Abstract | The influence of crystal orientations on the low-cycle fatigue (LCF) behavior of a 3Re-bearing Ni-based single-crystal superalloy at 980 degrees C has been investigated. It is found that the orientation dependence of the fatigue life not only depends on the elastic modulus, but also the number of active slip planes and the plasticity of materials determine the LCF life, especially for the [011] and [111] specimens. The [011] and [111] specimens with better plasticity withstand relatively concentrated inelastic deformation caused by fewer active slip planes, compared to the [001] specimens resisting widespread deformation caused by a higher number of active slip planes. Additionally, fatigue fracture is also influenced by cyclic plastic deformation mechanisms of the alloy with crystal orientations, and the [001] specimens are plastically deformed by wave slip mechanism and fracture along the non-crystallographic plane, while the [011] and [111] specimens are plastically deformed by planar slip mechanism and fracture along the crystallographic planes. Moreover, casting pores, eutectics, inclusions and surface oxide layers not only initiate the crack, but also reduce the stress concentration around crack tips. Our results throw light upon the effect of inelastic strain on the LCF life and analyze the cyclic plastic deformation for the alloy with different orientations. |
| Keyword | Single-crystal superalloy Low-cycle fatigue Anisotropy Fracture behavior |
| Funding Organization | National Natural Science Foundation of China ; Shenyang Science and Technology Project |
| DOI | 10.1007/s40195-018-0779-4 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51571196] ; National Natural Science Foundation of China[51671188] ; National Natural Science Foundation of China[5160119] ; Shenyang Science and Technology Project[17-101-2-00] |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000462257400011 |
| Publisher | CHINESE ACAD SCIENCES, INST METAL RESEARCH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/132456 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Meng, Jie |
| Affiliation | 1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Liaoning, Peoples R China 3.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China |
| Recommended Citation GB/T 7714 | Liu, Liu,Meng, Jie,Liu, Jin-Lai,et al. Effects of Crystal Orientations on the Low-Cycle Fatigue of a Single-Crystal Nickel-Based Superalloy at 980 degrees C[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2019,32(3):381-390. |
| APA | Liu, Liu,Meng, Jie,Liu, Jin-Lai,Zhang, Hai-Feng,Sun, Xu-Dong,&Zhou, Yi-Zhou.(2019).Effects of Crystal Orientations on the Low-Cycle Fatigue of a Single-Crystal Nickel-Based Superalloy at 980 degrees C.ACTA METALLURGICA SINICA-ENGLISH LETTERS,32(3),381-390. |
| MLA | Liu, Liu,et al."Effects of Crystal Orientations on the Low-Cycle Fatigue of a Single-Crystal Nickel-Based Superalloy at 980 degrees C".ACTA METALLURGICA SINICA-ENGLISH LETTERS 32.3(2019):381-390. |
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