Role of Ru on the Microstructural Evolution During Long-Term Aging of Ni-Based Single Crystal Superalloys

doi:10.1007/s40195-020-01110-3

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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
刊名	ACTA METALLURGICA SINICA-ENGLISH LETTERS
	2020-07-29
页码	10
关键词	Ni-based superalloys Ruthenium Coarsening TCP phase
ISSN号	1006-7191
DOI	10.1007/s40195-020-01110-3
通讯作者	Wang, Xin-Guang(xgwang11b@imr.ac.cn) ; Li, Jin-Guo(jgli@imr.ac.cn) ; Sun, Xiao-Feng(xfsun@imr.ac.cn)
英文摘要	Two 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.
资助项目	National 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研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
WOS记录号	WOS:000553704800001
资助机构	National 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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140004]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Xin-Guang; Li, Jin-Guo; Sun, Xiao-Feng
作者单位	Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China
推荐引用方式 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.