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Effect of long-term aging on microstructural stability and tensile deformation of a Fe-Ni-based superalloy
Huang, Yeshun1,2; Zhang, Rui1; Zhou, Zijian1; Yan, Jingbo3; Yuan, Yong3; Gu, Yuefeng3,4; Cui, Chuanyong1; Zhou, Yizhou1; Sun, Xiaofeng1
Corresponding AuthorCui, Chuanyong(chycui@imr.ac.cn)
2022-07-07
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume847Pages:11
AbstractThe microstructural evolution, tensile behavior and deformation mechanism of a Fe-Ni-based superalloy for advanced ultra-supercritical coal-fired power plant during long-term isothermal exposure at 700-800 degrees C for 500-3000 h were investigated. The coarsening rate constant of gamma ' phase in the alloy exposured at 700 degrees C, 750 degrees C and 800 degrees C were about 47.543 nm3/h, 277.963 nm3/h and 2201.937 nm3/h, respectively. The activation energy for gamma ' growing is around 250.24 kJ/mol. The results showed Al, Ti and Ni elements primarily gathered into gamma ' precipitates, while Cr and Fe mainly partitioned into gamma matrix in Fe-Ni base alloy. After long-term aging, there was no precipitation of harmful phases such as the eta and sigma phases, but the decomposition of MC + gamma -> M23C6 + gamma ' was observed. The microcracks were prone to initiate and propagate around pores formed by MC decomposition and lamellar M23C6 carbide, which might result in the premature fracture failure of the alloy. The yield strength first remained stable with a slight increase in the gamma ' phase diameter and then decreased after further thermal exposure. The variation of tensile strength with precipitate size could be rationalized by the transformation between shearing model and Orowan looping mechanism of gamma ' precipitates with increasing the gamma ' precipitate size.
KeywordFe-Ni-based alloy Long-term aging ? ? precipitate MC decomposition Tensile deformation
Funding OrganizationNational Key R&D Program of China ; Innovation Program of Institute of Metal Research, Chinese Academy of Sciences ; National Natural Science Foundation of China ; Liaoning Province
DOI10.1016/j.msea.2022.143298
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2021YFB3700600] ; National Key R&D Program of China[2017YFA0700703] ; National Key R&D Program of China[2019YFA0705300] ; Innovation Program of Institute of Metal Research, Chinese Academy of Sciences[2021-PY09] ; National Natural Science Foundation of China[92060102] ; Liaoning Province[2020-BS-007]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000809662100002
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174402
Collection中国科学院金属研究所
Corresponding AuthorCui, Chuanyong
Affiliation1.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.Xian Thermal Power Res Inst Co Ltd, Xi'an 710032, Peoples R China
4.Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China
Recommended Citation
GB/T 7714
Huang, Yeshun,Zhang, Rui,Zhou, Zijian,et al. Effect of long-term aging on microstructural stability and tensile deformation of a Fe-Ni-based superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,847:11.
APA Huang, Yeshun.,Zhang, Rui.,Zhou, Zijian.,Yan, Jingbo.,Yuan, Yong.,...&Sun, Xiaofeng.(2022).Effect of long-term aging on microstructural stability and tensile deformation of a Fe-Ni-based superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,847,11.
MLA Huang, Yeshun,et al."Effect of long-term aging on microstructural stability and tensile deformation of a Fe-Ni-based superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 847(2022):11.
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