| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Novel inspection of welded joint microstructure using magneto-optical imaging technology |
| Xiang-dong Gao(高向东)1, Zheng-wen Li(李正文)1, De-yong You(游德勇)1, Seiji Katayama2 |
1 School of Electromechanical Engineering, Guangdong University of Technology, Guangdong 510006, China;
2 Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan |
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Abstract A novel method for measuring differences of microstructure by advanced use of the Faraday magneto-optical effect is proposed. Two groups of YAG laser welds on Q235 have been investigated in order to compare MO imaging and traditional methods. Microstructure images have been compared with MO images, and MO diagrams display different colors and gray scales for the base metal, the weld zone, and the heat affected zone. Experimental results indicate that the welded joint microstructure can be inspected by MO imaging without metallographic preparation.
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Received: 11 November 2016
Revised: 05 January 2017
Accepted manuscript online:
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PACS:
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42.62.-b
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(Laser applications)
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78.20.Ls
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(Magneto-optical effects)
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81.20.Vj
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(Joining; welding)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51675104), the Science and Technology Planning Project of Guangzhou, China (Grant No. 201510010089), and the Science and Technology Planning Public Project of Guangdong Province, China (Grant No. 2016A010102015). |
Corresponding Authors:
Xiang-dong Gao
E-mail: gaoxd666@126.com
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Cite this article:
Xiang-dong Gao(高向东), Zheng-wen Li(李正文), De-yong You(游德勇), Seiji Katayama Novel inspection of welded joint microstructure using magneto-optical imaging technology 2017 Chin. Phys. B 26 054214
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