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Co content dependence on the microstructure characteristic and creep performance at elevated temperature in Ru-containing single crystal superalloys
Tan, Z. H.1,2; Wang, X. G.1; Cheng, Y.1; Li, Y. M.1; Yang, Y. H.1; Liu, J. L.1; Liu, J. D.1; Li, J. G.1; Zhou, Y. Z.1; Sun, X. F.1
Corresponding AuthorWang, X. G.(xgwang11b@imr.ac.cn) ; Sun, X. F.(xfsun@imr.ac.cn)
2021-09-21
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume825Pages:12
AbstractThe composition design and optimization of Ru-containing fourth generation single crystal superalloys, which are currently considered as the most advanced and practical materials for manufacturing high-pressure turbine blades of aero-engines, have been in increasing and urgent demands. In this work, significant adjustments to the pivotal alloying element Co were made and the synthetic effect of Co on the microstructure as well as hightemperature creep property in Ru-containing alloys were systematically evaluated. The results illustrated that the size of gamma ' phase was inversely proportional to the Co content but the volume fraction of gamma ' precipitates stayed the same in different alloys. The TCP phases were more likely to precipitate in alloys with lower or extremely high Co addition during long-term aging, while the morphology of these particles transformed from long needlelike to short rod-like or blocky as Co content increased. It was noted that the element diffusion as well as the resultant coarsening and rafting of gamma/gamma ' structures were favorably facilitated by the increasing Co addition. The alloy with 12 wt% Co exhibited the longest stress rupture life at 1140 degrees C/137 MPa, regardless of the moderate precipitation of blocky TCP particles during creep. Moreover, the TCP phases in different alloys were analyzed to be typical mu phase but the specific element distributions varied with Co addition. Moreover, plenty of 2nd gamma ' precipitates were observed after creep rupture, while their nucleation and precipitation could be affected by the Co addition in alloys. Ultimately, the comprehensive Co-effect was discussed and the optimum Co content was determined, in order to provide further guidance in the design and development of Ru-containing single crystal superalloys.
KeywordRu-containing single crystal superalloys Co Creep property Microstructural stability Precipitates
Funding OrganizationNational Science and Technology Major Project ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences ; National Key R&D Program of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences
DOI10.1016/j.msea.2021.141906
Indexed BySCI
Language英语
Funding ProjectNational Science and Technology Major Project[2017-VI-0002-0072] ; National Science and Technology Major Project[2017-VI-0003-0073] ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences[CXYJJ20-MS-03] ; National Key R&D Program of China[2017YFA0700704] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000695929500001
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/166998
Collection中国科学院金属研究所
Corresponding AuthorWang, X. G.; Sun, X. F.
Affiliation1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Tan, Z. H.,Wang, X. G.,Cheng, Y.,et al. Co content dependence on the microstructure characteristic and creep performance at elevated temperature in Ru-containing single crystal superalloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,825:12.
APA Tan, Z. H..,Wang, X. G..,Cheng, Y..,Li, Y. M..,Yang, Y. H..,...&Sun, X. F..(2021).Co content dependence on the microstructure characteristic and creep performance at elevated temperature in Ru-containing single crystal superalloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,825,12.
MLA Tan, Z. H.,et al."Co content dependence on the microstructure characteristic and creep performance at elevated temperature in Ru-containing single crystal superalloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 825(2021):12.
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