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Development of a Binary Zn-Based Solder Alloy for Joining Wrought Magnesium Alloy AZ31B

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Abstract

In the present article, the wrought magnesium alloy AZ31B sheets were soldered by means of high-frequency induction heating device using a novel binary Zn-based solder alloy in argon gas shield condition. The interfacial microstructure, phase constitution, and fracture morphology of the soldered joint were studied. The microhardness and shear strength of the soldered joint were tested. The experimental results exhibit that α-Mg solid solution and γ-MgZn phase were formed in soldering region. Moreover, the β-Mg7Zn3 phase in the original Zn-based solder alloy disappeared completely after the soldering process due to the fierce alloying between the molten binary Zn-based solder alloy and the base metal AZ31B during soldering. Test results show that the shear strength of the soldered joint is 28 MPa. The fracture morphology of the soldered joint displays an intergranular fracture mode, and the crack originates from α-Mg + γ-MgZn eutectoid structure. The interaction between the molten Zn-based solder alloy and the base metal AZ31B leads the Zn-based solder alloy to be transformed into Mg-based soldering metal during soldering.

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Acknowledgments

The authors thankfully acknowledge the sponsorship from the Project of Basic and Frontal Technology Research of Henan Province (No. 112300413201).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Brazing Filler Metals and Technology, Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou, 450001, People’s Republic of China

    Li Ma, Weimin Long & Peixin Qiao

  2. College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, People’s Republic of China

    Dingyong He & Xiaoyan Li

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  1. Li Ma
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  2. Weimin Long
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  3. Peixin Qiao
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  4. Dingyong He
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Correspondence to Li Ma.

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Ma, L., Long, W., Qiao, P. et al. Development of a Binary Zn-Based Solder Alloy for Joining Wrought Magnesium Alloy AZ31B. J. of Materi Eng and Perform 22, 118–122 (2013). https://doi.org/10.1007/s11665-012-0241-0

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  • DOI: https://doi.org/10.1007/s11665-012-0241-0

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