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Microstructure and mechanical properties of (Mg, Ce)-modified Al-7.5Si-15Cu-5Zn brazing joints on 5083 aluminum alloy
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  • Published: 05 March 2026

Microstructure and mechanical properties of (Mg, Ce)-modified Al-7.5Si-15Cu-5Zn brazing joints on 5083 aluminum alloy

  • Yan Wang1,
  • Yuechao Zhuo2,
  • Zhe Sun3,
  • Conghui Zhang4,
  • Yonglin Zhao4,
  • Bingyuan Han4 &
  • …
  • Yuxiang Liu5 

Scientific Reports , Article number:  (2026) Cite this article

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We are providing an unedited version of this manuscript to give early access to its findings. Before final publication, the manuscript will undergo further editing. Please note there may be errors present which affect the content, and all legal disclaimers apply.

Subjects

  • Engineering
  • Materials science

Abstract

This study investigated the microstructural evolution of Al-7.5Si-15Cu-5Zn brazing alloys modified by adding 0.5 wt.% Mg and xCe (x = 0.05, 0.1, 0.2, 0.3, 0.4 wt.%) . The mechanical properties of the corresponding brazing joints on 5083 aluminum alloy were measured with the aid of first-principle calculations. Results show that Mg and Ce elements refine the microstructure of Al-7.5Si-15Cu-5Zn brazing alloys by changing the morphology of the intermetallic phases. There is an interface zone between the brazing alloy and the base alloy in the joints and the thickness of interface zone evolves with the Mg addition and Ce contents. The virtual crystal approximation (VCA) method predicts the best mechanical properties of the joints using Al-7.5Si-15Cu-5Zn-0.5 Mg-0.2Ce brazing alloy, exhibiting the measured tensile strength, elongation and microhardness of 261.14 MPa, 11.95% and 194.6 HV0.2, respectively. Compared to the base brazing alloy without Mg and Ce additions, the tensile strength is increased by 42% and the elongation is improved by 47%.

Data availability

The datasets used or analyzed during the current study available from the corresponding author on reasonable request.

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Acknowledgements

This work was financially supported by Foundation of Research Project of China (50904010201) and Doctoral Scientific Research Foundation of Hubei University of Automotive Technology (BK202482).

Funding

This research did receive funding. Bingyuan Han received funding from Foundation of Research Project of China; Grant ID 50904010201. Bingyuan Han received funding from Doctoral Scientific Research Foundation of Hubei University of Automotive Technology; Grant ID BK202482.

Author information

Authors and Affiliations

  1. School of Civil Engineering and Transportation, Northeast Forestry University, Harbin, 150040, China

    Yan Wang

  2. School of Automotive and Traffic Engineering, Jiangsu University of Technology, Chang Zhou, 213001, China

    Yuechao Zhuo

  3. National Key Laboratory for Remanufacturing, Beijing, 100072, China

    Zhe Sun

  4. Hubei Provincial Key Laboratory of Automotive Power Transmission and Electronic Control, Shiyan, 442002, China

    Conghui Zhang, Yonglin Zhao & Bingyuan Han

  5. Research Centre for Laser Extreme Manufacturing, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China

    Yuxiang Liu

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Contributions

**Yan Wang:** Proposing the research topic: designing the research plan; finalizing the paper. **Yuechao Zhuo:** Reviewing and organizing literature, designing the paper framework; drafting the paper, revising the paper. **Zhe Sun:** Statistical analysis; guidance and support. **Conghui Zhang:** Statistical analysis; technical and material support. **Yonglin Zhao:** Statistical analysis, acquiring research funding, technical and material support. **Bingyuan Han:** Reviewing and finalizing the paper. **Yuxiang Liu:** Statistical analysis; finalizing the paper.

Corresponding authors

Correspondence to Yonglin Zhao or Yuxiang Liu.

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Wang, Y., Zhuo, Y., Sun, Z. et al. Microstructure and mechanical properties of (Mg, Ce)-modified Al-7.5Si-15Cu-5Zn brazing joints on 5083 aluminum alloy. Sci Rep (2026). https://doi.org/10.1038/s41598-026-42614-9

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  • Received: 17 October 2025

  • Accepted: 26 February 2026

  • Published: 05 March 2026

  • DOI: https://doi.org/10.1038/s41598-026-42614-9

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Keywords

  • Aluminum alloy brazing
  • Brazed joints
  • Microstructure and phases
  • First-principles calculation
  • Mechanical properties
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