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Diffusion Enhancement during Electrically Assisted Brazing of Ferritic Stainless Steel Alloys

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Abstract

The electrically assisted brazing of a ferritic stainless steel with nickel-based filler metal is experimentally investigated. During electrically assisted brazing of a lap joint, the temperature of the joint is first rapidly increased to a brazing temperature and held nearly constant for a specific period using a pulsed electric current. Microstructural analysis results strongly suggest that the electric current during electrically assisted brazing enhances diffusion between the filler metal and the ferritic stainless steel, thus inducing significantly thicker diffusion zones compared with induction brazing. The mechanical test results show that the strength of the electrically assisted brazing joint is comparable to or even superior to those of the joint fabricated by induction brazing, while the process time of the electrically assisted brazing is significantly shorter than that of induction brazing.

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Authors and Affiliations

  1. School of Mechanical Engineering, University of Ulsan, 93, Daehak-ro, Nam-gu, Ulsan, 44610, Republic of Korea

    Viet Tien Luu, Thi Kieu Anh Dinh, Hrishikesh Das, Ju-Ri Kim & Sung-Tae Hong

  2. Department of Materials Science & Engineering and Center for Iron & Steel Research, RIAM, Seoul National University, 1, Gwanak-ro, Gwanak-gu, 08826, Republic of Korea

    Hyun-Min Sung & Heung Nam Han

Authors
  1. Viet Tien Luu
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  2. Thi Kieu Anh Dinh
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  3. Hrishikesh Das
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  4. Ju-Ri Kim
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  5. Sung-Tae Hong
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  6. Hyun-Min Sung
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  7. Heung Nam Han
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Corresponding authors

Correspondence to Sung-Tae Hong or Heung Nam Han.

Additional information

Viet Tien Luu Ph.D. candidate of School of Mechanical Engineering, University of Ulsan. His research interest is advanced metal joining and forming.

Thi Kieu Anh Dinh Ph.D. candidate of School of Mechanical Engineering, University of Ulsan. Her research interest is advanced metal forming.

Hrishikesh Das Postdoctoral researcher of School of Mechanical Engineering, University of Ulsan. His research interest is friction stir welding.

Ju-Ri Kim M.S. graduate of School of Mechanical Engineering, University of Ulsan. She currently works for Hyundai Rotem Company. Her research interest is solid state joining.

Sung-Tae Hong Professor of School of Mechanical Engineering, University of Ulsan. His research interest is advanced metal forming and solid state joining.

Hyun-Min Sung Associate research engineer in Materials & Production engineering Research Institute, LG electronics. His research interest is structural materials.

Heung Nam Han Professor in Department of Materials Science & Engineering, Seoul National University. His research interest is the mechanical behavior and microstructure for materials.

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Luu, V.T., Dinh, T.K.A., Das, H. et al. Diffusion Enhancement during Electrically Assisted Brazing of Ferritic Stainless Steel Alloys. Int. J. of Precis. Eng. and Manuf.-Green Tech. 5, 613–621 (2018). https://doi.org/10.1007/s40684-018-0063-0

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  • DOI: https://doi.org/10.1007/s40684-018-0063-0

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