| Pt-Al bond coat dependence on the high-cycle fatigue rupture and deformation mechanisms of a fourth-generation single crystal superalloy at various temperatures | |
| Tao, Xipeng1; Tan, Kejie2,3; Liang, Jingjing1; Wang, Xinguang1; Zhou, Yizhou1; Li, Jinguo1; Sun, Xiaofeng1 | |
| Corresponding Author | Wang, Xinguang(xgwang11b@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn) |
| 2023-05-01 | |
| Source Publication | MATERIALS & DESIGN
 |
| ISSN | 0264-1275 |
| Volume | 229Pages:18 |
| Abstract | The impact of a Pt-Al bond coat on the high-cycle fatigue (HCF) behaviour of fourth-generation single crystal superalloys at 760t and 900t was investigated. The Pt-Al bond coat was found to be almost negligible under low stresses at 760t; however, the bond coat effect was detrimental at 900t or under high stresses at 760t. At 760 degrees C with increasing high-amplitude stress, the tip cracks preferentially nucleated from defects within coat and propagated inwards, accelerating the fracture. The fatigue life of the coated alloys was considerably decreased at 900 degrees C, which was attributed to the damage accumulated in the bond coating via oxidation, crack-induced oxide cracking and interfacial microstructure degradation. An Elevated temperature led to the crack-induced oxides shifting from a small fan-shape to a large umbrella-shape, increasing the density of slip bands and quantity of secondary cracks in the substrate. Furthermore, more Ru diffused outwards at 900t than that at 760t, which caused the disappearance of L-C dislocation locks and tertiary c0 phases and aggravated TCP phases precipitation in the substrate at 900t. Ultimately, to assess the degradation of the HCF life, an empirical life prediction method was developed, and the calculations results well matched the test results. (c) 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
| Keyword | Single crystal superalloy High cycle fatigue Rupture behaviour Deformation mechanisms Pt-Al bond coat |
| Funding Organization | Science Center for Gas Turbine Project ; National Key R&D Program of China ; National Science and Technology Major Project ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences |
| DOI | 10.1016/j.matdes.2023.111880 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Science Center for Gas Turbine Project ; National Key R&D Program of China[P2021-A-IV-002-002] ; National Science and Technology Major Project ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences ; [2017YFA0700704] ; [2017-VI-0002-0072] ; [CXYJJ20-MS-03] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| WOS ID | WOS:001010390900001 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/178157 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang, Xinguang; Zhou, Yizhou |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Cent Iron & Steel Res Inst, High Temp Mat Res Inst, Beijing 100081, Peoples R China |
| Recommended Citation GB/T 7714 | Tao, Xipeng,Tan, Kejie,Liang, Jingjing,et al. Pt-Al bond coat dependence on the high-cycle fatigue rupture and deformation mechanisms of a fourth-generation single crystal superalloy at various temperatures[J]. MATERIALS & DESIGN,2023,229:18. |
| APA | Tao, Xipeng.,Tan, Kejie.,Liang, Jingjing.,Wang, Xinguang.,Zhou, Yizhou.,...&Sun, Xiaofeng.(2023).Pt-Al bond coat dependence on the high-cycle fatigue rupture and deformation mechanisms of a fourth-generation single crystal superalloy at various temperatures.MATERIALS & DESIGN,229,18. |
| MLA | Tao, Xipeng,et al."Pt-Al bond coat dependence on the high-cycle fatigue rupture and deformation mechanisms of a fourth-generation single crystal superalloy at various temperatures".MATERIALS & DESIGN 229(2023):18. |
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