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CAS OpenIR  > 中科院上海应用物理研究所2011-2017年  > 期刊论文
题名:
Corner fatigue cracking behavior of hybrid laser AA7020 welds by synchrotron X-ray computed microtomography
作者: Wu, SC; Yu, C; Yu, PS; Buffiere, JY; Helfen, L; Fu, YN
刊名: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期: 2016
卷号: 651, 期号:-, 页码:604—614
关键词: FINITE-ELEMENT-ANALYSIS ; ALUMINUM-ALLOY ; 3-DIMENSIONAL VISUALIZATION ; MICROSTRUCTURE ; TOMOGRAPHY ; POROSITY ; CLOSURE ; PROPAGATION ; DAMAGE ; STRESS
DOI: 10.1016/j.msea.2015.11.011
通讯作者: Wu, SC (reprint author), Southwest Jiaotong Univ, State Key Lab Tract Power, Chengdu 610031, Peoples R China.
文章类型: 期刊文献
英文摘要: 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.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000367486800072
ISSN号: 0921-5093
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/25669
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
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,2016-01-01,651(-):604—614.
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文件名: Corner fatigue cracking behavior of hybrid laser AA7020 welds by synchrotron X-ray computed microtomography.pdf
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