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Investigation on overlap joining of AZ61 magnesium alloy: laser welding, adhesive bonding, and laser weld bonding

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Abstract

This paper presents the research on weldability of magnesium alloy AZ61 sheets by overlap laser welding, adhesive bonding, and laser seam weld bonding processes. Microstructures and mechanical properties of the joints are investigated. In overlap laser welding, the joint fractures at the interface between the sheets and maximum shear strength can reach 85% of that of the base metal. Off-center moment during tensile shear test can lead to the strength loss, while the weld edge can also influence the strength as a cracking source. Adhesive bonded joint can offer high tensile shear failure force but low peel strength. Laser weld bonded joint offers higher tensile shear failure force than either laser welded joint or adhesive bonded joint does, and the improved failure load is due to combined contribution of the weld seam and the adhesive. The weld seam can block the adhesive crack propagation, and the adhesive improves the stress distribution, so they can offer a synergistic effect.

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Acknowledgments

The authors gratefully acknowledge the sponsorship from the National Natural Science Funds of China for Distinguished Young Scholar (51025520).

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Authors and Affiliations

  1. Key Laboratory of Liaoning Advanced Welding and Joining Technology, School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, People’s Republic of China

    Daxin Ren, Liming Liu & Yongfei Li

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  1. Daxin Ren
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  2. Liming Liu
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  3. Yongfei Li
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Correspondence to Liming Liu.

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Ren, D., Liu, L. & Li, Y. Investigation on overlap joining of AZ61 magnesium alloy: laser welding, adhesive bonding, and laser weld bonding. Int J Adv Manuf Technol 61, 195–204 (2012). https://doi.org/10.1007/s00170-011-3683-x

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  • DOI: https://doi.org/10.1007/s00170-011-3683-x

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