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The effect of coarsening of gamma ' precipitate on creep properties of Ni-based single crystal superalloys during long-term aging
Huang, Y. S.1,2; Wang, X. G.1; Cui, C. Y.1; Li, J. G.1; Ye, L. H.1; Hou, G. C.1; Yang, Y. H.1; Liu, J. L.1; Liu, J. D.1; Zhou, Y. Z.1; Sun, X. F.1
Corresponding AuthorWang, X. G.(xgwang11b@imr.ac.cn) ; Cui, C. Y.(chycui@imr.ac.cn) ; Sun, X. F.(xfsun@imr.ac.cn)
2020-01-31
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume773Pages:8
AbstractThe correlation between the coarsening of gamma' precipitate and creep properties during long-term aging at 1000 degrees C for 100-1000 h of a fourth-generation nickel-based single crystal superalloy was investigated. The average size of gamma' precipitate increased with the extension of aging time and the morphology of gamma' precipitate kept cuboidal shape after 1000 h. Experimental observation on the coarsening of gamma' phase demonstrated that the relationship between r(t)(3) - r(0)(3) and t was in accordance with the LSW theory and the coarsening rate k was about 5954 nm(3)/h. The creep life of aged samples at 1140 degrees C/137 MPa increased firstly and then decreased with the exposure time prolonging. The casting pores and creep pores were observed on the fracture surface of samples after creep rupture. Compared with the creep pores, the microcracks formed at the edge of casting pores had greater effect on the creep life. The creep properties of samples during aging were mostly affected by the size of gamma' phase. The promotion of creep life of aged sample was rationalized by the slightly grown gamma' phase, the diffusion of the refractory elements and the accumulation of dislocations in the gamma channel. The decrease of creep life was predominantly affected by the seriously coarsened gamma' phase because the significant increase of the size of gamma' phase leaded to a decrease in the resistance of dislocation movement.
KeywordNi-based single crystal superalloys Long-term aging gamma ' coarsening Creep properties
Funding OrganizationNational Science and Technology Major Project ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; State Key Lab of Advanced Metals and Materials Open Fund
DOI10.1016/j.msea.2019.138886
Indexed BySCI
Language英语
Funding ProjectNational Science and Technology Major Project[2017-VI-0002-0072] ; National Key R&D Program of China[2017YFA0700704] ; National Natural Science Foundation of China (NSFC)[51601192] ; National Natural Science Foundation of China (NSFC)[51671188] ; State Key Lab of Advanced Metals and Materials Open Fund[2018-Z07]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000513985200031
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137408
Collection中国科学院金属研究所
Corresponding AuthorWang, X. G.; Cui, C. Y.; Sun, X. F.
Affiliation1.Chinese Acad Sci, Inst Met Res, Superalloys Div, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Nano Sci & Technol Inst, Suzhou 215123, Peoples R China
Recommended Citation
GB/T 7714
Huang, Y. S.,Wang, X. G.,Cui, C. Y.,et al. The effect of coarsening of gamma ' precipitate on creep properties of Ni-based single crystal superalloys during long-term aging[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,773:8.
APA Huang, Y. S..,Wang, X. G..,Cui, C. Y..,Li, J. G..,Ye, L. H..,...&Sun, X. F..(2020).The effect of coarsening of gamma ' precipitate on creep properties of Ni-based single crystal superalloys during long-term aging.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,773,8.
MLA Huang, Y. S.,et al."The effect of coarsening of gamma ' precipitate on creep properties of Ni-based single crystal superalloys during long-term aging".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 773(2020):8.
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