IMR OpenIR
Pt-Al bond coat dependence on the creep stress distribution, deformation and fracture behaviour in a second generation Ni-based single crystal superalloy
Tao, X. P.1,2; Wang, X. G.1; Zhou, Y. Z.1; Tan, K. J.1,2; Liang, J. J.1; Yang, Y. H.1; Liu, J. L.1; Liu, J. D.1; Li, J. G.1; Sun, X. F.1
Corresponding AuthorWang, X. G.(xgwang11b@imr.ac.cn) ; Zhou, Y. Z.(yzzhou@imr.ac.cn)
2021-02-23
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume805Pages:13
AbstractAn evaluation was conducted on the impact of a Pt-Al bond coat on the creep behaviours of a second-generation Ni-based single crystal superalloy at 750 degrees C/820 MPa, 850 degrees C/630 MPa, 1038 degrees C/137 MPa and 1100 degrees C/112 MPa, respectively. As revealed by the creep results, the creep behaviours of the coated superalloy were inferior to those of the bare superalloy to some extent under all testing conditions. The maximum deterioration in the strainto-fracture and time-to-rupture was observed at 1100 degrees C/112 MPa (7.3%) and 750 degrees C/820 MPa (74.7 h), respectively. Following the creep test, deconvolution calculations were performed, which indicated that the creep stress for all core superalloys was as low as approximately 1.7-1.9% of the applied stress while the bond coat stress was 4.0-10.4% that at the minimum creep rate. Moreover, TEM analyses revealed that within the superalloy substrate adjacent to the bond coat, there were fewer stacking faults and an abundance of dislocation debris observed within gamma'-Ni3Al at 750 degrees C/820 MPa. The misfit of the gamma/gamma' phase was insignificant and the dislocation networks became irregular at 1100 degrees C/112 MPa. With an increase in temperature from 750 degrees C to 1100 degrees C, the fracture mechanism of both the substrate and bond-coat was found to shift from quasi-cleavage to micro-void coalescence. The quasi-cleavage cracks occurring within the bond coat increased the number of connections with creep cracks to cause spreading from the interior of the samples, thus resulting in premature failure at 750 degrees C/820 MPa and 850 degrees C/630 MPa. However, the degradation at 1038 degrees C/137 MPa and 1100 degrees C/112 MPa was ascribed to the increasing thickness of the inter-diffusion zone, as well as the volume of the blocky gamma'-Ni3Al phase inside the bond coat and topologically close-packed phases in the superalloy near the bond coat.
KeywordCreep stress distribution Deformation mechanism Fracture behaviour Single crystal superalloy Pt-Al bond Coat
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Science and Technology Major Project ; National Key R&D Program of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences
DOI10.1016/j.msea.2020.140575
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[51701210] ; National Natural Science Foundation of China (NSFC)[51671188] ; National Science and Technology Major Project[2017-VI-0002-0072] ; National Key R&D Program of China[2017YFA0700704] ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences[CXYJJ20-MS-03]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000620162200002
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/160866
Collection中国科学院金属研究所
Corresponding AuthorWang, X. G.; Zhou, Y. Z.
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Tao, X. P.,Wang, X. G.,Zhou, Y. Z.,et al. Pt-Al bond coat dependence on the creep stress distribution, deformation and fracture behaviour in a second generation Ni-based single crystal superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,805:13.
APA Tao, X. P..,Wang, X. G..,Zhou, Y. Z..,Tan, K. J..,Liang, J. J..,...&Sun, X. F..(2021).Pt-Al bond coat dependence on the creep stress distribution, deformation and fracture behaviour in a second generation Ni-based single crystal superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,805,13.
MLA Tao, X. P.,et al."Pt-Al bond coat dependence on the creep stress distribution, deformation and fracture behaviour in a second generation Ni-based single crystal superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 805(2021):13.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Tao, X. P.]'s Articles
[Wang, X. G.]'s Articles
[Zhou, Y. Z.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Tao, X. P.]'s Articles
[Wang, X. G.]'s Articles
[Zhou, Y. Z.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Tao, X. P.]'s Articles
[Wang, X. G.]'s Articles
[Zhou, Y. Z.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.