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Fatigue crack initiation and propagation in an alpha-iron polycrystal
Chu, RQ; Cai, Z; Li, SX; Wang, ZG
Corresponding AuthorChu, RQ()
2001-08-31
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume313Issue:1-2Pages:64-68
AbstractThe 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.
Keywordalpha-iron polycrystal cyclic deformation crack initiation and propagation finite element analysis crystal orientation
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000169772900007
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/112621
Collection中国科学院金属研究所
Corresponding AuthorChu, RQ
AffiliationChinese Acad Sci, Met Res Inst, State Key Lab Fatigue & Fracture Mat, Shenyang 110015, Peoples R China
Recommended Citation
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.
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