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Study on Microstructure and Mechanical Properties of Aluminum–Copper Dissimilar Metals Joints by Nanosecond Laser Spiral Welding

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Abstract

Aluminum–copper dissimilar metals were successfully welded by nanosecond laser and optical galvanometer scanning. The joint formation, microstructure characteristics, and mechanical properties under different lap forms were studied. The results showed that when the joint was Al (upper)/Cu (under), the metal on the aluminum side melted completely. Part of the aluminum intruded into the copper base material to form a “V”-shaped weld. When the joint was Cu (upper)/Al(under), the weld consisted of multiple "nail"-shaped welds. In the two overlapping forms, the welds were mainly composed of four structures: γ2-Cu9Al4 phase region, hypereutectic region, eutectic region, and hypoeutectic region. The weld penetration formed by the Cu/Al joint was greater than that of the Al/Cu weld.

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Acknowledgements

This research was supported by the Foundation of Natural Science Foundation of China (51905333, 51805316), Shanghai local colleges and universities capacity building special plan project (19030501300).

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Authors and Affiliations

  1. School of Materials Engineering, Songjiang Campus of Shanghai University of Engineering Science, Room 3109, 333 Long Teng Rd., Shanghai, 201620, China

    Qiran Cheng, Peilei Zhang, Haichuan Shi & Zhishui Yu

  2. Shanghai Collaborative Innovation Center of Laser Advanced Manufacturing Technology, Shanghai, 201620, China

    Qiran Cheng, Peilei Zhang, Haichuan Shi & Zhishui Yu

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  1. Qiran Cheng
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  2. Peilei Zhang
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Correspondence to Peilei Zhang.

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Cheng, Q., Zhang, P., Shi, H. et al. Study on Microstructure and Mechanical Properties of Aluminum–Copper Dissimilar Metals Joints by Nanosecond Laser Spiral Welding. Trans Indian Inst Met 75, 2517–2528 (2022). https://doi.org/10.1007/s12666-022-02623-4

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