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Microstructure and properties of joint for stirring brazing of dissimilar Al/Mg alloy during heating processes

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Abstract

In this paper, 2024 Al alloy and AZ31B Mg alloy were brazed with aid of stirring without flux in air. The effects of the brazing temperature on microstructure and shear strength of the joint were investigated. The diffusion zone is found at joint interface near Al base metal, which consists of Al–Zn–Sn solid solution. At the same time, continuous intermetallic compounds (IMCs) phase and broken ones are found at joint interface near Mg base metal, which mainly consists of the Mg2Sn phase. With the increase of the brazing temperature, the shear strength at the joint interface near Al base metal rises gradually. On the contrary, that of the joint interface near Mg base metal obviously decreases.

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Acknowledgments

The work was financially supported by the Natural Science Foundation Project of Chongqing Science and Technology Commission (No. cstc2011jjA50001).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Chongqing University of Technology, Chongqing, 400054, China

    Hui-Bin Xu, Hui-Bin Sun, Hui Yang, Lu-Xin Chi & Jun Chen

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  1. Hui-Bin Xu
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  2. Hui-Bin Sun
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  3. Hui Yang
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  4. Lu-Xin Chi
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  5. Jun Chen
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Correspondence to Hui-Bin Xu.

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Xu, HB., Sun, HB., Yang, H. et al. Microstructure and properties of joint for stirring brazing of dissimilar Al/Mg alloy during heating processes. Rare Met. 34, 245–250 (2015). https://doi.org/10.1007/s12598-014-0391-3

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  • DOI: https://doi.org/10.1007/s12598-014-0391-3

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