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Phase precipitation behavior and tensile properties of as-cast Ni-based superalloy during heat treatment
Gao, Shuang1,2; Hou, Jie-shan1; Guo, Yong-an1; Zhou, Lan-zhang1
Corresponding AuthorHou, Jie-shan(jshou@imr.ac.cn)
2018-09-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume28Issue:9Pages:1735-1744
AbstractThe phase precipitation behavior and tensile properties of an as-cast Ni-based alloy, IN617B alloy, after solution heat treatment and long-term aging treatment were investigated. Ti(C,N), M6C and M23C6 are the primary precipitates in as-cast microstructure. After solution heat treatment, most of carbides dissolve into the matrix except a few fine Ti(C,N) within grains. During long-term aging at 700 degrees C, the phase precipitation behaviors of the alloy are characterized as follows: (1) M23C6 carbides at grain boundaries (GBs) transform from film-like shape to cellular shape and gradually coarsen due to the decrease of the surface energy and element aggregation to GBs; (2) M23C6 carbides within grains have a bar-like morphology with a preferential growth direction [110] and have a cube-on-cube coherent orientation relationship with the matrix gamma; (3) gamma' particles inhibit the coarsening of M23C6 within grains by constraining the diffusion of formation elements. Furthermore, the tensile strength of the alloy obviously increases, but the ductility significantly decreases after the aging for 5000 h. The alloy has a relatively stable microstructure which guarantees the excellent tensile properties during long-term aging.
KeywordNi-based superalloy phase precipitation carbide gamma' phase tensile properties
Funding OrganizationNational Natural Science Foundation of China ; National Energy Administration Program of China
DOI10.1016/S1003-6326(18)64817-4
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51571191] ; National Energy Administration Program of China[NY 20150102]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000446870200006
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/129774
Collection中国科学院金属研究所
Corresponding AuthorHou, Jie-shan
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Gao, Shuang,Hou, Jie-shan,Guo, Yong-an,et al. Phase precipitation behavior and tensile properties of as-cast Ni-based superalloy during heat treatment[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2018,28(9):1735-1744.
APA Gao, Shuang,Hou, Jie-shan,Guo, Yong-an,&Zhou, Lan-zhang.(2018).Phase precipitation behavior and tensile properties of as-cast Ni-based superalloy during heat treatment.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,28(9),1735-1744.
MLA Gao, Shuang,et al."Phase precipitation behavior and tensile properties of as-cast Ni-based superalloy during heat treatment".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 28.9(2018):1735-1744.
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