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Effects of 1 at.% Ta substitution for 1 at.% W on the coarsening kinetics and deformation behavior of gamma'-strengthened CoNi-base superalloys
Qu, Shasha1,2; Li, Yingju1; Tong, Min1; Wang, Cuiping3,4; Yang, Yuansheng1
Corresponding AuthorLi, Yingju(yjli@imr.ac.cn) ; Yang, Yuansheng(ysyang@imr.ac.cn)
2021-08-17
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume823Pages:11
AbstractThe coarsening behavior of the gamma' precipitates and compression deformation mechanism of the gamma'-strengthened CoNi-base superalloys are investigated. By substituting 1 at.% Ta for 1 at.% W, the 4W2Ta alloy exhibits a higher gamma' solvus temperature of 1218 degrees C and a lower mass density of 8.93 g/cm3. During the aging process from 900 to 1000 degrees C, both of the 5W1Ta and 4W2Ta alloys show stable gamma/gamma' two-phase microstructure. The coarsening behavior of the gamma' precipitates in the two alloys follows the classical Lifshitz-Slyozov-Wagner (LSW) model. The coarsening rate constant of the 4W2Ta alloy is approximately two times lower than that of the 5W1Ta alloy, which is attributed to its larger lattice mismatch due to the addition of Ta. Besides, compared with the 5W1Ta alloy, the 4W2Ta alloy has higher high-temperature strength and shows different deformation behavior. When the deformation temperature is lower than 800 degrees C, pairs of dislocations shear the gamma' precipitates and gamma matrix. At 800 degrees C, stacking faults (SFs) appear in the gamma' precipitates and increase with the increasing temperature, whereas most of dislocations bypass the gamma' precipitates at 1000 degrees C.
KeywordCoNi-Base superalloy Microstructural evolution Coarsening kinetics Compression deformation Dislocation structure
Funding OrganizationNational Natural Science Foundation of China ; National Science and Technology Major Project ; Key Research and Development Program of Liaoning Province
DOI10.1016/j.msea.2021.141776
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51831007] ; National Science and Technology Major Project[2017-VI-0003-0073] ; Key Research and Development Program of Liaoning Province[2019JH2/10100009]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000682358100003
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159560
Collection中国科学院金属研究所
Corresponding AuthorLi, Yingju; Yang, Yuansheng
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
3.Xiamen Univ, Coll Mat, Xiamen 361005, Peoples R China
4.Xiamen Univ, Fujian Prov Key Lab Mat Genome, Xiamen 361005, Peoples R China
Recommended Citation
GB/T 7714
Qu, Shasha,Li, Yingju,Tong, Min,et al. Effects of 1 at.% Ta substitution for 1 at.% W on the coarsening kinetics and deformation behavior of gamma'-strengthened CoNi-base superalloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,823:11.
APA Qu, Shasha,Li, Yingju,Tong, Min,Wang, Cuiping,&Yang, Yuansheng.(2021).Effects of 1 at.% Ta substitution for 1 at.% W on the coarsening kinetics and deformation behavior of gamma'-strengthened CoNi-base superalloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,823,11.
MLA Qu, Shasha,et al."Effects of 1 at.% Ta substitution for 1 at.% W on the coarsening kinetics and deformation behavior of gamma'-strengthened CoNi-base superalloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 823(2021):11.
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