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Pt-Al bond coat dependence on the high-cycle fatigue rupture and deformation mechanisms of a fourth-generation single crystal superalloy at various temperatures

文献类型：期刊论文

作者Tao, Xipeng2; Tan, Kejie1,3; Liang, Jingjing2; Wang, Xinguang2; Zhou, Yizhou2; Li, Jinguo2; Sun, Xiaofeng2
刊名MATERIALS & DESIGN
出版日期2023-05-01
卷号229页码:18
关键词Single crystal superalloy High cycle fatigue Rupture behaviour Deformation mechanisms Pt-Al bond coat
ISSN号0264-1275
DOI10.1016/j.matdes.2023.111880
通讯作者Wang, Xinguang(xgwang11b@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn)
英文摘要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/).
资助项目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研究方向Materials Science
语种英语
WOS记录号WOS:001010390900001
出版者ELSEVIER SCI LTD
资助机构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
源URL[http://ir.imr.ac.cn/handle/321006/178156]  
专题金属研究所_中国科学院金属研究所
通讯作者Wang, Xinguang; Zhou, Yizhou
作者单位1.Cent Iron & Steel Res Inst, High Temp Mat Res Inst, Beijing 100081, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式
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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来源：金属研究所

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