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The formation and evolution of NiAl phase in a fourth generation nickel-based single crystal superalloy
Song, W.1,2; Wang, X. G.1; Li, J. G.1; Meng, J.1; Duan, T. F.3; Yang, Y. H.1; Liu, J. L.1; Liu, J. D.1; Pei, W. L.2; Zhou, Y. Z.1; Sun, X. F.1
Corresponding AuthorWang, X. G.(xgwang11b@imr.ac.cn) ; Li, J. G.(jgli@imr.ac.cn) ; Sun, X. F.(xfsun@imr.ac.cn)
2020-12-25
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume848Pages:8
AbstractThe formation mechanism of the Ru-rich beta-NiAl phase in a nickel-based single crystal superalloy and its evolution course during the long-term aging were investigated. The beta-NiAl phase confirmed via the XRD and TEM analysis was observed in the solidification process for casting alloy. The intensive study on the formation mechanism of the beta-NiAl phase was conducted based on the analyses of the phase diagram, the incipient melting experiment, and the segregation behavior. In addition, a new phase identified as the 8 phase was also observed in the beta-NiAl phase, which was enriched in Re, Co, W, and Ni. The so- lidification path was determined as L -> beta, L -> beta + delta, L + beta -> gamma', L -> gamma', L -> (gamma + gamma'), which took into consideration the influence of the beta-NiAl phase and the 8 phase. Besides, the high melting point of the beta-NiAl phase induced impediment in homogenizing heat treatment, long-term aging at 1100 degrees C from 100 h to 1000 h was carried out to eliminate the beta-NiAl phase. Hence, the gamma'/beta-NiAl and gamma/beta-NiAl diffusion couples were put forward to interpret the evolution of the beta-NiAl phase during the long-term aging. The TCP phase which was determined as mu phase via the selected diffraction spot was examined in the full heat-treated and long-term aging specimens. The morphology of the TCP phase could be divided into three types: needle-like, rod-like, and bulk-like. The influence of the beta-NiAl phase on the formation of the TCP phase was researched in detail. (C) 2020 Elsevier B.V. All rights reserved.
KeywordNi-based superalloys NiAl Solidification path Long-term aging TCP phase
Funding OrganizationNational Key R&D Program of China ; National Science and Technology Major Project ; National Natural Science Foundation of China(NSFC) ; State Key Lab of Advanced Metals and Materials OpenFund ; Youth Innovation Promotion Association, Chinese Academy of Sciences
DOI10.1016/j.jallcom.2020.156584
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFA0700704] ; National Science and Technology Major Project[2017-VI-0002-0072] ; National Natural Science Foundation of China(NSFC)[51601192] ; National Natural Science Foundation of China(NSFC)[51671188] ; State Key Lab of Advanced Metals and Materials OpenFund[2018-Z07] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000573298300007
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140770
Collection中国科学院金属研究所
Corresponding AuthorWang, X. G.; Li, J. G.; Sun, X. F.
Affiliation1.Chinese Acad Sci, Inst Met Res, Superalloys Div, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China
3.Liaoning Res Insitiute Light Ind, Shenyang 110000, Peoples R China
Recommended Citation
GB/T 7714
Song, W.,Wang, X. G.,Li, J. G.,et al. The formation and evolution of NiAl phase in a fourth generation nickel-based single crystal superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,848:8.
APA Song, W..,Wang, X. G..,Li, J. G..,Meng, J..,Duan, T. F..,...&Sun, X. F..(2020).The formation and evolution of NiAl phase in a fourth generation nickel-based single crystal superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,848,8.
MLA Song, W.,et al."The formation and evolution of NiAl phase in a fourth generation nickel-based single crystal superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 848(2020):8.
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