Effect of ruthenium on microstructure and high-temperature creep properties of fourth generation Ni-based single-crystal superalloys

doi:10.1016/j.msea.2019.138646

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of ruthenium on microstructure and high-temperature creep properties of fourth generation Ni-based single-crystal superalloys
	Song, W.1,2; Wang, X. G.1; Li, J. G.1; Ye, L. H.1; Hou, G. C.1; Yang, Y. H.1; Liu, J. L.1; Liu, J. D.1; Pei, W. L.2; Zhou, Y. Z.1
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2020-01-20
卷号	772 页码:10
关键词	Ni-based superalloys Ruthenium Elevated temperature creep gamma/gamma ' lattice misfit Interfacial dislocation networks
ISSN号	0921-5093
DOI	10.1016/j.msea.2019.138646
通讯作者	Wang, X. G.(xgwang11b@imr.ac.cn) ; Pei, W. L.(peiwl@atm.neu.edu.cn) ; Sun, X. F.(xfsun@imr.ac.cn)
英文摘要	The effects of Ru on microstructure and creep properties of the two alloys were investigated in detail. According to the creep curves of the two alloys at 1140 degrees C/137 MPa, the creep rupture life was significantly improved with the increase of Ru and the mechanism of each stage during the creep deformation was different. Thus, the evolution of the gamma' phase, the dislocation configuration, and the effect of Ru on solution strengthening were discussed. The gamma/gamma' lattice misfit of the initial microstructure presented increasingly negative as the content of Ru increased, which resulted in smaller and more regular gamma' particles in the initial state. Meanwhile, more consistent and denser dislocation networks on the gamma/gamma' interface during creep deformation were examined. Hence, the addition of Ru decreased the minimum creep rate and prolonged the secondary creep stage. Moreover, the so-called "reverse partitioning" behavior and enhancement of gamma matrix strength appeared with the increase of Ru. When the alloy contained 2.5 wt% Ru, the rapidly increasing in creep strain rate induced by the topological inversion appeared. When the alloy included 3.5 wt% Ru, the needle-like and rod-like topologically close-packed (TCP) phases were observed occasionally. The stress and the supersaturation of refractory elements resulted in the precipitation of the TCP phase. The dramatic increase of the creep strain rate was principally related to the propagation of micro-cracks around the casting and creep voids in the necked regions.
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 (NSFC)[51601192] ; National Natural Science Foundation of China (NSFC)[51671188] ; State Key Lab of Advanced Metals and Materials Open Fund[2018-Z07]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000509621500089
资助机构	National Science and Technology Major Project (2017) ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; 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/321006/137254]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, X. G.; Pei, W. L.; Sun, X. F.
作者单位	1.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
推荐引用方式 GB/T 7714	Song, W.,Wang, X. G.,Li, J. G.,et al. Effect of ruthenium on microstructure and high-temperature creep properties of fourth generation Ni-based single-crystal superalloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,772:10.
APA	Song, W..,Wang, X. G..,Li, J. G..,Ye, L. H..,Hou, G. C..,...&Sun, X. F..(2020).Effect of ruthenium on microstructure and high-temperature creep properties of fourth generation Ni-based single-crystal superalloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,772,10.
MLA	Song, W.,et al."Effect of ruthenium on microstructure and high-temperature creep properties of fourth generation Ni-based single-crystal superalloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 772(2020):10.