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Effect of external applied steady magnetic field on the morphology of laser welding joint of 4-mm 2024 aluminum alloy

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Abstract

Additional external steady magnetic fields were applied to investigate the influence of a steady magnetic field aligned perpendicular to the welding direction during laser beam welding of 2024 aluminum alloy. The flow pattern in the molten pool and the weld seam geometry were significantly changed by the induced Lorentz force distribution in the liquid metal. It revealed that the application of a steady magnetic field to laser beam welding was helpful to the suppression of the characteristic wineglass-shape and the depth-to-width ratio because of the Marangoni convection. The microstructures and component distributions at various laser power and magnetic field intensity were analyzed too. It was indicated that the suppression of the Marangoni convection by Lorentz force was beneficial to accumulation of component and grain coarsening near the fusion line.

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Acknowledgements

The authors gratefully acknowledge the financial support of the project from the National Commercial Aircraft Manufacturing Engineering Technology Research Center Innovation Fund of China (SAMC14-JS-15-052), National Science Foundation of China (No. U1637103) and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

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Authors and Affiliations

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China

    Xiaohong Zhan, Junjie Zhou, Jicheng Chen & Yanhong Wei

  2. Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, 43210, USA

    Xiaohong Zhan & Weihua Sun

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  1. Xiaohong Zhan
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  2. Junjie Zhou
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Correspondence to Xiaohong Zhan.

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Zhan, X., Zhou, J., Sun, W. et al. Effect of external applied steady magnetic field on the morphology of laser welding joint of 4-mm 2024 aluminum alloy. Appl. Phys. A 123, 106 (2017). https://doi.org/10.1007/s00339-016-0671-x

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  • DOI: https://doi.org/10.1007/s00339-016-0671-x

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