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Effects of B content on microstructure and high-temperature stress rupture properties of a high chromium polycrystalline nickel-based superalloy
Wang, Haiwei1,2; Yang, Jinxia1; Meng, Jie1; Ci, Shiwei1,2; Yang, Yanhong1; Sheng, Naicheng1; Zhou, Yizhou1; Sun, Xiaofeng1
Corresponding AuthorYang, Jinxia(jxyang@imr.ac.cn) ; Meng, Jie(jmeng@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn)
2021-04-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume860Pages:11
AbstractEffects of boron (B) addition on microstructure and high-temperature stress rupture properties of a heat-treated high chromium polycrystalline Nickel-based superalloy were investigated by adjusting B content (0, 0.016 wt%, 0.048 wt%, 0.09 wt%). The results indicated that the grain boundary characteristics were altered by B addition, such as the morphologies of the MC carbides, M23C6 carbides and precipitation of gamma' particles along grain boundaries. Meanwhile, it was confirmed that B existed in the form of Cr-rich M5B3 borides in the boron-containing alloys. Moreover, boron addition aggravated the inhomogeneity of microstructures, and reduced the volume fraction of secondary gamma' particles. Additionally, the rupture life was remarkably improved as the B content was increased to 0.016 wt%, whilst the elongation tended to improve as the B content was increased to 0.048 wt%. The improvement of stress rupture properties was mainly contributed to the modification of the grain boundary characteristics which retarded crack nucleation and propagation at grain boundaries. However, with excessive addition of B, the stress rupture properties were reduced significantly, as the solid solution strengthening and precipitation strengthening tended to be weakened by B addition, in addition the incipient melting regions and lager size borides promoted the intragranular crack nucleation and propagation. (C) 2020 Elsevier B.V. All rights reserved.
KeywordNickel-based superalloy Boron Microstructure Grain boundary Stress rupture properties
Funding OrganizationNational Key R&D Program of China ; National Science and Technology Major Project ; National Natural Science Foundation of China
DOI10.1016/j.jallcom.2020.157929
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2019YFA0705300] ; National Science and Technology Major Project[2017-.-0003-0073] ; National Natural Science Foundation of China[51701210]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000614154600031
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159196
Collection中国科学院金属研究所
Corresponding AuthorYang, Jinxia; Meng, Jie; Zhou, Yizhou
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, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Wang, Haiwei,Yang, Jinxia,Meng, Jie,et al. Effects of B content on microstructure and high-temperature stress rupture properties of a high chromium polycrystalline nickel-based superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,860:11.
APA Wang, Haiwei.,Yang, Jinxia.,Meng, Jie.,Ci, Shiwei.,Yang, Yanhong.,...&Sun, Xiaofeng.(2021).Effects of B content on microstructure and high-temperature stress rupture properties of a high chromium polycrystalline nickel-based superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,860,11.
MLA Wang, Haiwei,et al."Effects of B content on microstructure and high-temperature stress rupture properties of a high chromium polycrystalline nickel-based superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 860(2021):11.
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