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| Porosity induced fatigue damage of laser welded 7075-T6 joints investigated via synchrotron X-ray microtomography | |
| Wu, SC; Yu, C; Zhang, WH; Fu, YN; Helfen, L | |
| 2015 | |
| Source Publication | SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
 |
| Volume | 20Issue:1Pages:11—19 |
| Subtype | 期刊文献 |
| Abstract | The interaction between the pores and the fatigue damage in 7075-T6 joints was characterised via high resolution synchrotron radiation X-ray microcomputed tomography. The spatial distribution and growth behaviour of the pores were investigated and quantified. The gas porosity inside 7075-T6 hybrid welds was found to play a significant role in the fatigue crack nucleation and propagation process. The volume fraction and the total number of pores increased slightly with increasing number of fatigue cycles, which provides a key indicator for the damage evolution. Experimental results indicate that the micropores grew and distorted during fatigue cyclic loading, eventually resulting in fatigue cracks. Under cyclic loads, the maximum micropore is usually not a favourable site, in terms of physical suitability, for fatigue crack initiation and propagation, and the diameter of the cracked pores is in the range of 10-100 mu m. |
| Keyword | 3-dimensional Visualization Aluminum-alloys Hydrogen Micropores Cast-aluminum Crack Tomography Behavior Deformation |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/24535 |
| Collection | 中科院上海应用物理研究所2011-2020年 |
| Recommended Citation GB/T 7714 | Wu, SC,Yu, C,Zhang, WH,et al. Porosity induced fatigue damage of laser welded 7075-T6 joints investigated via synchrotron X-ray microtomography[J]. SCIENCE AND TECHNOLOGY OF WELDING AND JOINING,2015,20(1):11—19. |
| APA | Wu, SC,Yu, C,Zhang, WH,Fu, YN,&Helfen, L.(2015).Porosity induced fatigue damage of laser welded 7075-T6 joints investigated via synchrotron X-ray microtomography.SCIENCE AND TECHNOLOGY OF WELDING AND JOINING,20(1),11—19. |
| MLA | Wu, SC,et al."Porosity induced fatigue damage of laser welded 7075-T6 joints investigated via synchrotron X-ray microtomography".SCIENCE AND TECHNOLOGY OF WELDING AND JOINING 20.1(2015):11—19. |
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| Porosity induced fat（565KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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