Corner fatigue cracking behavior of hybrid laser AA7020 welds by synchrotron X-ray computed microtomography
Wu, SC; Yu, C; Yu, PS; Buffiere, JY; Helfen, L; Fu, YN; Wu, SC (reprint author), Southwest Jiaotong Univ, State Key Lab Tract Power, Chengdu 610031, Peoples R China.
2016
发表期刊MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
卷号651期号:-页码:604—614
文章类型期刊文献
摘要To elucidate the fatigue corner cracking behaviors related with gas pores of hybrid laser arc welded 7020-T651 alloys, both high-resolution in situ synchrotron X-ray computed microtomography and finite element based predictions containing the closure effect or significant plasticity have been undertaken in the domain of fracture mechanics. It is found that fatigue cracks are preferentially initiated from a pore intersecting with the corner free surface and that it steadily propagates inside the weld with a quarter elliptical shape. Moreover, the fatigue corner crack exhibits a very complex morphology. A quantitative agreement between the experiment and prediction of crack shape under executed loading cycles is observed. By using the critical stress intensity factor along the crack line, the modified fracture toughness of a given hybrid laser weld can also be determined numerically for three-dimensional non-penetration curved fatigue cracks. (C) 2015 Elsevier B.V. All rights reserved.
关键词Finite-element-analysis Aluminum-alloy 3-dimensional Visualization Microstructure Tomography Porosity Closure Propagation Damage Stress
DOI10.1016/j.msea.2015.11.011
收录类别SCI
语种英语
WOS记录号WOS:000367486800072
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25669
专题中科院上海应用物理研究所2011-2018年
通讯作者Wu, SC (reprint author), Southwest Jiaotong Univ, State Key Lab Tract Power, Chengdu 610031, Peoples R China.
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GB/T 7714
Wu, SC,Yu, C,Yu, PS,et al. Corner fatigue cracking behavior of hybrid laser AA7020 welds by synchrotron X-ray computed microtomography[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016,651(-):604—614.
APA Wu, SC.,Yu, C.,Yu, PS.,Buffiere, JY.,Helfen, L.,...&Wu, SC .(2016).Corner fatigue cracking behavior of hybrid laser AA7020 welds by synchrotron X-ray computed microtomography.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,651(-),604—614.
MLA Wu, SC,et al."Corner fatigue cracking behavior of hybrid laser AA7020 welds by synchrotron X-ray computed microtomography".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 651.-(2016):604—614.
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