Corner fatigue cracking behavior of hybrid laser AA7020 welds by synchrotron X-ray computed microtomography
文献类型：期刊论文
| 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 |
| ISSN号 | 0921-5093 |
| 通讯作者 | Wu, SC (reprint author), Southwest Jiaotong Univ, State Key Lab Tract Power, Chengdu 610031, Peoples R China. |
| 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 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/25669]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 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,&Fu, YN.(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. |
入库方式： OAI收割
来源：上海应用物理研究所
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