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The effect of wobbling on the welding characteristics in Al/Cu fiber laser welded joints

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Abstract

The IR laser welding of aluminum and copper materials for lithium-ion batteries has limitations due to inadequate joint strength caused by their high thermal conductivity and reflectivity. To overcome these problems, this study has applied beam oscillation to increase the joint area of welded joints. A 1000 series aluminum alloy and oxygen-free copper sheets with a thickness of 0.5 mm were welded through 2.5 kW fiber laser welding. The effect of the welding parameters of amplitudes (0, 0.2, 0.4, 0.6 mm) on weldability and electrical characteristics of welded joints has been investigated. The results confirmed that as the amplitude increases, the bead width at the interface increases, and penetration depth decreases. In addition, the tensile-shear load increased with higher amplitudes, and the maximum tensile-shear load was 1.1 kN at a travel speed of 400 mm/s with an amplitude of 0.6 mm. The minimum electrical resistance obtained was 82 µΩ at an amplitude of 0.6 mm, which was approximately 25% lower compared to the amplitude of 0 mm due to the reduction of intermetallic compounds.

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Funding

This paper was supported by the Korea Institute for Advancement of Technology (KIAT) grant funded by the Korean Government (MOTIE) (P0008425, The Competency Development Program for Industry Specialist). This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2020R1I1A3055274).

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Authors and Affiliations

  1. Dept. of Welding and Joining Science Engineering, Graduate School, Chosun Univ, 309, Pilmun-Daero, Gwangju, 61452, Republic of Korea

    Hye-Seul Yoon

  2. Dept. of Welding and Joining Science Engineering, Chosun Univ, 309, Pilmun-Daero, Gwangju, 61452, Republic of Korea

    Hee-Seon Bang

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  1. Hye-Seul Yoon
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Contributions

The mechanical characteristics and metallurgical characteristics were investigated by Hye-Seul Yoon. Hee-Seon Bang supervised the entire work. All authors read and approved the final manuscript.

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Correspondence to Hee-Seon Bang.

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Yoon, HS., Bang, HS. The effect of wobbling on the welding characteristics in Al/Cu fiber laser welded joints. Int J Adv Manuf Technol 127, 5343–5352 (2023). https://doi.org/10.1007/s00170-023-11653-1

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