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Role of Ru on the Microstructural Evolution During Long-Term Aging of Ni-Based Single Crystal Superalloys
Song, Wei; Wang, Xin-Guang; Li, Jin-Guo; Huang, Ye-Shun; Meng, Jie; Yang, Yan-Hong; Liu, Jin-Lai; Liu, Ji-De; Zhou, Yi-Zhou; Sun, Xiao-Feng
Corresponding AuthorWang, Xin-Guang(xgwang11b@imr.ac.cn) ; Li, Jin-Guo(jgli@imr.ac.cn) ; Sun, Xiao-Feng(xfsun@imr.ac.cn)
2020-07-29
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Pages10
AbstractTwo experimental alloys containing different contents of Ru were investigated to study the effect of Ru on the microstructural evolution during long-term thermal exposure. The increase in Ru promoted the formation of cubical, tiny, and even gamma ' phase after full heat treatment. Moreover, the samples after full heat treatment were exposed at 1100 degrees C for different time. Based on the classical model by Lifshitz, Slyozov, and Wagner, the coarsening of gamma ' phase of the alloy containing 2.5 and 3.5 wt.% Ru during the long-term aging was controlled by the interface reaction and diffusion, respectively. The gamma/gamma ' lattice misfit was more negative with the increment of Ru addition, which induced the formation of stable rafted gamma ' phase in the alloy containing 3.5 wt.% Ru at the initiation of long-term aging. Besides, the increase in Ru reduced the diffusion coefficient, which could restrain the gamma ' phase coarsening. The lower gamma/gamma ' lattice misfit of the alloy containing 2.5 wt.% Ru promoted the interface reaction, which induced the rapid coarsening of gamma ' phase. Therefore, the increase in Ru improved the microstructural stability of the alloys. On the other hand, the raise of Ru induced "reverse partitioning" behavior, which was effective in suppressing the emergence of the topologically close-packed phase (TCP phase). The TCP phase occasionally occurred in the alloy containing 2.5 wt.% Ru, which was attributed to the high temperature and the supersaturation of the gamma matrix. Moreover, the TCP phase was determined as mu phase, which had a high concentration of Co, Re, Mo, and W. A sketch map describing the evolution of the TCP phase was also constructed.
KeywordNi-based superalloys Ruthenium Coarsening TCP phase
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 ; State Key Lab of Advanced Metals and Materials Open Fund
DOI10.1007/s40195-020-01110-3
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 ; State Key Lab of Advanced Metals and Materials Open Fund[2018-Z07]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000553704800001
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140005
Collection中国科学院金属研究所
Corresponding AuthorWang, Xin-Guang; Li, Jin-Guo; Sun, Xiao-Feng
AffiliationChinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Song, Wei,Wang, Xin-Guang,Li, Jin-Guo,et al. Role of Ru on the Microstructural Evolution During Long-Term Aging of Ni-Based Single Crystal Superalloys[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2020:10.
APA Song, Wei.,Wang, Xin-Guang.,Li, Jin-Guo.,Huang, Ye-Shun.,Meng, Jie.,...&Sun, Xiao-Feng.(2020).Role of Ru on the Microstructural Evolution During Long-Term Aging of Ni-Based Single Crystal Superalloys.ACTA METALLURGICA SINICA-ENGLISH LETTERS,10.
MLA Song, Wei,et al."Role of Ru on the Microstructural Evolution During Long-Term Aging of Ni-Based Single Crystal Superalloys".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2020):10.
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