Influence of Ta/Al ratio on the microstructure and creep property of a Ru-containing Ni-based single-crystal superalloy

doi:10.1016/j.jmst.2021.03.002

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	Influence of Ta/Al ratio on the microstructure and creep property of a Ru-containing Ni-based single-crystal superalloy
	Song, Wei 1,2; Wang, Xinguang 1; Li, Jinguo 1; Meng, Jie 1; Yang, Yanhong 1; Liu, Jinlai 1; Liu, Jide 1; Zhou, Yizhou 1; Sun, Xiaofeng 1
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2021-10-30
卷号	89 页码:16-23
关键词	Ni-based superalloys Ta/Al ratio High temperature creep Interfacial dislocation networks gamma-rafting
ISSN号	1005-0302
DOI	10.1016/j.jmst.2021.03.002
通讯作者	Wang, Xinguang(xgwang11b@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
英文摘要	Two alloys with different Ta and Al contents were applied to study the influence of Ta/Al ratio on the microstructural evolution and creep deformation under high temperature. The increase of Ta/Al ratio made the gamma/gamma' lattice misfit more negative and enhanced the volume fraction of gamma' phase, which produced cubic and small gamma' phase in the initial microstructures. These initial tiny gamma' phases impeded the dislocations movement and delayed the course of complete rafted gamma' phase during the origination of creep deformation, which prolonged the time of the primary creep stage. Moreover, the increase of Ta/Al ratio and addition of Ru produced the denser and stable dislocation networks, the high APB energy and better solution strengthening, which hindered the climbing and sliding of dislocations, and restrained the formation of superdislocations in the gamma' precipitate. The second creep stage was extended, and the minimum creep rate was reduced. Hence, the increase of whole creep life of the alloy containing high Ta/Al ratio was attributed to the prolongation of the primary and second creep stages, and the low minimum creep rate. The appearance of the topological inversion phenomenon during the tertiary creep stage was the primary cause for the sudden increase of the creep strain rate of the alloy containing low Ta/Al ratio. However, the high creep strain rate of the alloy containing high Ta/Al ratio during the tertiary creep stage was related to the occurrence and extending of the cracks near the voids. Both alloys would lose efficacy within 20 h-30 h. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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 and State Key Lab of Advanced Metals and Materials Open Fund[2018-Z07]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000696986000002
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 and 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/321006/167011]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Xinguang; Li, Jinguo
作者单位	1.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Song, Wei,Wang, Xinguang,Li, Jinguo,et al. Influence of Ta/Al ratio on the microstructure and creep property of a Ru-containing Ni-based single-crystal superalloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,89:16-23.
APA	Song, Wei.,Wang, Xinguang.,Li, Jinguo.,Meng, Jie.,Yang, Yanhong.,...&Sun, Xiaofeng.(2021).Influence of Ta/Al ratio on the microstructure and creep property of a Ru-containing Ni-based single-crystal superalloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,89,16-23.
MLA	Song, Wei,et al."Influence of Ta/Al ratio on the microstructure and creep property of a Ru-containing Ni-based single-crystal superalloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 89(2021):16-23.