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Influence of Ta/Al ratio on the microstructure and creep property of a Ru-containing Ni-based single-crystal superalloy
Song, Wei1,2; Wang, Xinguang1; Li, Jinguo1; Meng, Jie1; Yang, Yanhong1; Liu, Jinlai1; Liu, Jide1; Zhou, Yizhou1; Sun, Xiaofeng1
Corresponding AuthorWang, Xinguang(xgwang11b@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
2021-10-30
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume89Pages:16-23
AbstractTwo alloys with different Ta and Al contents were applied to study the influence of Ta/Al ratio on the microstructural evolution and creep deformation under high temperature. The increase of Ta/Al ratio made the gamma/gamma' lattice misfit more negative and enhanced the volume fraction of gamma' phase, which produced cubic and small gamma' phase in the initial microstructures. These initial tiny gamma' phases impeded the dislocations movement and delayed the course of complete rafted gamma' phase during the origination of creep deformation, which prolonged the time of the primary creep stage. Moreover, the increase of Ta/Al ratio and addition of Ru produced the denser and stable dislocation networks, the high APB energy and better solution strengthening, which hindered the climbing and sliding of dislocations, and restrained the formation of superdislocations in the gamma' precipitate. The second creep stage was extended, and the minimum creep rate was reduced. Hence, the increase of whole creep life of the alloy containing high Ta/Al ratio was attributed to the prolongation of the primary and second creep stages, and the low minimum creep rate. The appearance of the topological inversion phenomenon during the tertiary creep stage was the primary cause for the sudden increase of the creep strain rate of the alloy containing low Ta/Al ratio. However, the high creep strain rate of the alloy containing high Ta/Al ratio during the tertiary creep stage was related to the occurrence and extending of the cracks near the voids. Both alloys would lose efficacy within 20 h-30 h. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordNi-based superalloys Ta/Al ratio High temperature creep Interfacial dislocation networks gamma-rafting
Funding OrganizationNational Science and Technology Major Project ; National Key R&D Program of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences and State Key Lab of Advanced Metals and Materials Open Fund
DOI10.1016/j.jmst.2021.03.002
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[51671188] ; National Natural Science Foundation of China[51601192] ; National Natural Science Foundation of China[51701210] ; Youth Innovation Promotion Association, Chinese Academy of Sciences and State Key Lab of Advanced Metals and Materials Open Fund[2018-Z07]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000696986000002
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167012
Collection中国科学院金属研究所
Corresponding AuthorWang, Xinguang; Li, Jinguo
Affiliation1.Chinese Acad Sci, Inst Met Res, Superalloys Div, 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
Recommended Citation
GB/T 7714
Song, Wei,Wang, Xinguang,Li, Jinguo,et al. Influence of Ta/Al ratio on the microstructure and creep property of a Ru-containing Ni-based single-crystal superalloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,89:16-23.
APA Song, Wei.,Wang, Xinguang.,Li, Jinguo.,Meng, Jie.,Yang, Yanhong.,...&Sun, Xiaofeng.(2021).Influence of Ta/Al ratio on the microstructure and creep property of a Ru-containing Ni-based single-crystal superalloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,89,16-23.
MLA Song, Wei,et al."Influence of Ta/Al ratio on the microstructure and creep property of a Ru-containing Ni-based single-crystal superalloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 89(2021):16-23.
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