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Effect of external longitudinal magnetic field on arc plasma characteristics and droplet transfer during laser-MIG hybrid welding

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Abstract

The arc plasma behavior and droplet transfer are investigated using laser-MIG (metal insert gas) hybrid welding assisted by an external longitudinal magnetic field. The characteristic of arc plasma and droplet transfer can be recorded via combining sensing of the welding current and arc voltage with a high-speed imaging. Results indicated that the external longitudinal magnetic field had a significant impact on the arc shape, droplet formation, droplet size, and detaching. Under the magnetic field, the arc shape became a triangle gradually, and the off-axis arc and droplet gradually pointed to the axis of the filler wire. In addition, it has been found that with increasing the magnetic induction intensity, the droplet diameter and cycle time can be reduced. The mechanism of these phenomena was also further analyzed.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, People’s Republic of China

    Xun Zhang, Zeyang Zhao, Gaoyang Mi, Chunming Wang, Ruoyang Li & Xiyuan Hu

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  1. Xun Zhang
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  2. Zeyang Zhao
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  3. Gaoyang Mi
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  4. Chunming Wang
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  5. Ruoyang Li
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  6. Xiyuan Hu
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Correspondence to Chunming Wang.

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Zhang, X., Zhao, Z., Mi, G. et al. Effect of external longitudinal magnetic field on arc plasma characteristics and droplet transfer during laser-MIG hybrid welding. Int J Adv Manuf Technol 92, 2185–2195 (2017). https://doi.org/10.1007/s00170-017-0293-2

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  • DOI: https://doi.org/10.1007/s00170-017-0293-2

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