中国物理B ›› 2017, Vol. 26 ›› Issue (5): 54214-054214.doi: 10.1088/1674-1056/26/5/054214

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Novel inspection of welded joint microstructure using magneto-optical imaging technology

Xiang-dong Gao(高向东), Zheng-wen Li(李正文), De-yong You(游德勇), Seiji Katayama   

  1. 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
  • 收稿日期:2016-11-11 修回日期:2017-01-05 出版日期:2017-05-05 发布日期:2017-05-05
  • 通讯作者: Xiang-dong Gao E-mail:gaoxd666@126.com
  • 基金资助:
    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).

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. 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
  • Received:2016-11-11 Revised:2017-01-05 Online:2017-05-05 Published:2017-05-05
  • Contact: Xiang-dong Gao E-mail:gaoxd666@126.com
  • Supported by:
    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).

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摘要： 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.

关键词: welded joint inspection, microstructure property, magneto-optical imaging

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.

Key words: welded joint inspection, microstructure property, magneto-optical imaging

中图分类号:  (Laser applications)

  • 42.62.-b
78.20.Ls (Magneto-optical effects) 81.20.Vj (Joining; welding)