High cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ951

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	High cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ951
	Z. K. Chu; J. J. Yu; X. F. Sun; H. R. Guan; Z. Q. Hu
	2008
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	496 期号:1-2 页码:355-361
摘要	Smooth and notched specimens of a directionally solidified Ni-base superalloy DZ951 alloy were subjected to high cycle fatigue (HCF) loading at temperatures of 700 and 900 degrees C in ambient atmosphere. The results show that the fatigue strength at 700 degrees C is higher than that at 900 degrees C while the notch sensitivity at 900 degrees C is lower than that at 700 degrees C. As for the smooth specimens, the fracture mode exhibits strong temperature dependence. At 700 degrees C, only stage I crack propagation can be observed while both stage I and stage 11 crack Propagation can be found at 900 degrees C. A correlation exists between the crack propagation mode and deformation mode. The fracture mode observed at 700 degrees C is associated with single planar slip while that at 900 degrees C is associated with the combination action of planar slip, cross-slip and climb of dislocations. The notch effect plays a significant role in crack initiation and propagation process. The multiple primary cracks initiate at the surface for the notched specimens while single primary crack initiates at the carbide/matrix interface for the smooth specimens. (C) 2008 Elsevier B.V. All rights reserved.
部门归属	[chu zhaokuang; yu jinjiang; sun xiaofeng; guan hengrong; hu zhuangqi] chinese acad sci, inst met res, shenyang 110016, peoples r china. [chu zhaokuang] chinese acad sci, grad sch, beijing 100039, peoples r china.;chu, zk (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;zkchu@imr.ac.cn
关键词	Ni-base Superalloy High Cycle Fatigue Notch Sensitivity Slip Bands Single-crystal Superalloy Crack-growth Temperature-dependence Elevated-temperatures Orientation
URL	查看原文
WOS记录号	WOS:000260639400046
引用统计	被引频次：28[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/321006/32693
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. K. Chu,J. J. Yu,X. F. Sun,et al. High cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ951[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2008,496(1-2):355-361.
APA	Z. K. Chu,J. J. Yu,X. F. Sun,H. R. Guan,&Z. Q. Hu.(2008).High cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ951.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,496(1-2),355-361.
MLA	Z. K. Chu,et al."High cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ951".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 496.1-2(2008):355-361.