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Fatigue cracking and fracture behaviors of coarse-grained copper under cyclic tension-compression and torsion loadings
R. H. Li; P. Zhang; Z. F. Zhang
2013
Source PublicationMaterials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN0921-5093
Volume574Pages:113-122
AbstractIn this study, fatigue damage and fracture behaviors of coarse-grained copper are investigated under cyclic tension-compression and torsion loadings. The cyclic stress response and dislocation patterns of coarse-grained copper under the two fatigue tests are compared. Fatigue crack initiation, propagation and fracture surfaces of the specimens are found to rely on the loading mode. In general, the initiation and early propagation of fatigue cracks are mostly controlled by the direction of the maximum shear stress. The effect of normal stress can be used to explain the common tendency for fatigue cracks to propagate from stage I to stage II. Combining the formation mechanism of fatigue striations with the analysis of stress state, it is found that fatigue cracks are much easier to transform from stage I to stage II under tension-compression fatigue than under torsion fatigue. But under torsion fatigue with higher strain amplitude, because the driving force is much higher, stage II fatigue crack propagation obviously exists. Additionally, by analyzing the growth condition of longitudinal and circumferential cracks, the fracture process of torsion fatigue with different strain amplitudes is discussed. (C) 2013 Elsevier B.V. All rights reserved.
description.department[li, r. h. ; zhang, p. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zhang, zf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zhfzhang@imr.ac.cn
KeywordPolycrystalline Copper Fatigue Crack Torsion Fatigue Striation Electron Channeling Contrast Stress-strain Response Persistent Slip Bands Single-crystals Polycrystalline Copper Deformation-behavior Dislocation Patterns Propagation Behavior Multiaxial Fatigue Magnesium Alloy
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71324
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
R. H. Li,P. Zhang,Z. F. Zhang. Fatigue cracking and fracture behaviors of coarse-grained copper under cyclic tension-compression and torsion loadings[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2013,574:113-122.
APA R. H. Li,P. Zhang,&Z. F. Zhang.(2013).Fatigue cracking and fracture behaviors of coarse-grained copper under cyclic tension-compression and torsion loadings.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,574,113-122.
MLA R. H. Li,et al."Fatigue cracking and fracture behaviors of coarse-grained copper under cyclic tension-compression and torsion loadings".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 574(2013):113-122.
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