Dissolution of gamma' Phase in a Single Crystal Superalloy After High-cycle Fatigue

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	Dissolution of gamma' Phase in a Single Crystal Superalloy After High-cycle Fatigue
	Liu Yuan 2,3; Wang Linning 1,2; Yu Jinjiang 2; Sun Xiaofeng 2
刊名	RARE METAL MATERIALS AND ENGINEERING
	2020-09-01
卷号	49 期号:9 页码:2925-2929
关键词	dissolution precipitation high-cycle fatigue single crystal superalloy
ISSN号	1002-185X
通讯作者	Wang Linning(lnwang00@163.com)
英文摘要	High-cycle fatigue (HCF) tests at different temperatures were performed on a single crystal superalloy SRR99 with [001] orientation. The results demonstrate that conditional fatigue strength increases first and then decreases with the increase of temperature, exhibiting the same tendency with tensile strength at elevated temperatures. The microstructures were observed by SEM and TEM and it is found that the morphology of gamma' particles changes significantly and dissolution of gamma' particles takes place during cyclic loading. This may be induced by the back and forth movement of interface dislocations during the cyclic loading. As a result, the strengthening effect of the coherent gamma/gamma coherent interfaces is gradually deteriorated during high-cycle fatigue deformation. In addition, the fatigue crack propagation is found to be primarily along a specific crystalline plane, which is identified as (111). The specific mechanism for the microstructure evolution during cyclic loading was discussed based on SEM and TEM observations.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000576197200003
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140901]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang Linning
作者单位	1.Tianjin Univ Technol & Educ, Tianjin 300222, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Civil Aviat Univ China, Tianjin 300300, Peoples R China
推荐引用方式 GB/T 7714	Liu Yuan,Wang Linning,Yu Jinjiang,et al. Dissolution of gamma' Phase in a Single Crystal Superalloy After High-cycle Fatigue[J]. RARE METAL MATERIALS AND ENGINEERING,2020,49(9):2925-2929.
APA	Liu Yuan,Wang Linning,Yu Jinjiang,&Sun Xiaofeng.(2020).Dissolution of gamma' Phase in a Single Crystal Superalloy After High-cycle Fatigue.RARE METAL MATERIALS AND ENGINEERING,49(9),2925-2929.
MLA	Liu Yuan,et al."Dissolution of gamma' Phase in a Single Crystal Superalloy After High-cycle Fatigue".RARE METAL MATERIALS AND ENGINEERING 49.9(2020):2925-2929.