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Influence of alloy elements on microstructure and mechanical properties of Al/steel dissimilar joint by laser welding/brazing

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Abstract

The problem in dissimilar material joining (e.g., Al/steel) is the degradation of joint mechanical properties by formation of the hard and brittle interfacial intermetallic compounds. In the present study, in order to improve the joint mechanical properties, alloy elements Si and Zn are added in the form of Al-Si and Zn-Al filler metals, respectively. The effects of alloy elements on the joints are investigated in terms of interfacial microstructure and mechanical properties. The results have shown that element Si is able to suppress the growth of interfacial reaction layer, which leads to the improvement in the fracture load, while element Zn is capable of reducing the brittleness of reaction layer, and it consequently enhances the fracture load.

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Funding

Financial support of National Natural Science Foundation of China (no. 51665038) and State Scholarship Fund of China (no. 201306820002) are gratefully acknowledged.

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Authors and Affiliations

  1. Department of Materials Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China

    Jin Yang & Zhishui Yu

  2. Key Laboratory of Robot and Welding Automation of Jiangxi Province, Nanchang University, Nanchang, Jiangxi, 330031, China

    Yulong Li & Hua Zhang

  3. School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China

    Wei Guo

  4. Center for Advanced Materials Joining, University of Waterloo, Waterloo, ON, N2L 3G1, Canada

    Norman Zhou

Authors
  1. Jin Yang
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  2. Zhishui Yu
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  3. Yulong Li
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  4. Hua Zhang
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  5. Wei Guo
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  6. Norman Zhou
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Corresponding author

Correspondence to Jin Yang.

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Recommended for publication by Commission XVII - Brazing, Soldering and Diffusion Bonding

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Yang, J., Yu, Z., Li, Y. et al. Influence of alloy elements on microstructure and mechanical properties of Al/steel dissimilar joint by laser welding/brazing. Weld World 62, 427–433 (2018). https://doi.org/10.1007/s40194-017-0540-z

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  • DOI: https://doi.org/10.1007/s40194-017-0540-z

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