High cycle fatigue behavior of a single crystal superalloy at elevated temperatures

doi:10.1016/j.msea.2006.11.045

IMR OpenIR

	High cycle fatigue behavior of a single crystal superalloy at elevated temperatures
	Liu, Y.; Yu, J. J.; Xu, Y.; Sun, X. F.; Guan, H. R.; Hu, Z. Q.
通讯作者	Liu, Y.(yuanliu@imr.ac.cn)
	2007-04-25
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	454 页码:357-366
摘要	Smooth and notched specimens of single crystal (SC) superalloy SRR99 with [001] orientation were subjected to high-cycle fatigue (HCF) loading at temperatures of 700 degrees C, 760 degrees C, 850 degrees C and 900 degrees C in ambient atmosphere. The results demonstrate that the fatigue strength of smooth specimens reached the maximum at 760 degrees C and decreased with increasing temperature. The alloy became more notching sensitive with increase of temperature while the notch sensitivity declined at 900 degrees C. Analysis on fracture surfaces of both smooth and notched specimen shows that a transition from ductile fracture at lower temperatures to cleavage mode at higher temperatures were observed. Evolution of the microstructure was investigated by SEM and TEM observation. With the process of cyclic plastic deformation at elevated temperatures, the primary cuboidal gamma' precipitates tended to dissolve into the matrix channels, meanwhile a larger number of secondary gamma' particles were formed in the gamma matrix. In addition, different types of dislocation structures were developed during the cyclic deformation, which would have a significant impact on the fatigue life of the material. (C) 2006 Elsevier B.V. All rights reserved.
关键词	single crystal high-cycle fatigue notch sensitivity dislocation networks slip bands
DOI	10.1016/j.msea.2006.11.045
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000245898500049
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：56[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/91112
专题	中国科学院金属研究所
通讯作者	Liu, Y.
作者单位	1.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Liu, Y.,Yu, J. J.,Xu, Y.,et al. High cycle fatigue behavior of a single crystal superalloy at elevated temperatures[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2007,454:357-366.
APA	Liu, Y.,Yu, J. J.,Xu, Y.,Sun, X. F.,Guan, H. R.,&Hu, Z. Q..(2007).High cycle fatigue behavior of a single crystal superalloy at elevated temperatures.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,454,357-366.
MLA	Liu, Y.,et al."High cycle fatigue behavior of a single crystal superalloy at elevated temperatures".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 454(2007):357-366.