Fatigue crack initiation and propagation in an alpha-iron polycrystal

IMR OpenIR

	Fatigue crack initiation and propagation in an alpha-iron polycrystal
	Chu, RQ; Cai, Z; Li, SX; Wang, ZG
通讯作者	Chu, RQ()
	2001-08-31
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	313 期号:1-2 页码:64-68
摘要	The cyclic deformation and crack initiation and propagation of alpha-iron polycrystals have been studied under stress-control with emphasis on the dependence on the stress amplitudes and orientation of grains. The orientations of grains surrounding cracks were determined by the electron backscatter diffraction (EBSD). It was found that cracks did not originate at grain boundaries but along the slip lines intersecting with the free surface at the corner of the specimen. At lower stress amplitude, the crack propagated in a transgranular mode, but at higher stress amplitude the crack propagated in a mixed mode-transgranular mode and intergranular mode. The stress distribution along the loading axis of grains surrounding the crack was calculated using a three-dimensional anisotropic finite element method (FEM). In the present work, it was shown that the crack initiation mainly depends on three factors: higher stress distribution, abundant dislocation sources and less resistance to dislocation motion. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词	alpha-iron polycrystal cyclic deformation crack initiation and propagation finite element analysis crystal orientation
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:000169772900007
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：13[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/321006/112621
专题	中国科学院金属研究所
通讯作者	Chu, RQ
作者单位	Chinese Acad Sci, Met Res Inst, State Key Lab Fatigue & Fracture Mat, Shenyang 110015, Peoples R China
推荐引用方式 GB/T 7714	Chu, RQ,Cai, Z,Li, SX,et al. Fatigue crack initiation and propagation in an alpha-iron polycrystal[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2001,313(1-2):64-68.
APA	Chu, RQ,Cai, Z,Li, SX,&Wang, ZG.(2001).Fatigue crack initiation and propagation in an alpha-iron polycrystal.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,313(1-2),64-68.
MLA	Chu, RQ,et al."Fatigue crack initiation and propagation in an alpha-iron polycrystal".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 313.1-2(2001):64-68.