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Study on the influence of surface nickel plating on the microstructure and mechanical properties of WC-8Co/Inconel 718 brazed joints

  • Metals & corrosion
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Abstract

The drilling and sampling technique is the preferred method for lunar soil sample collection. In response to the poor wettability of the AgCuNiMn brazing alloy that is utilized for the lunar soil drilling tools on the surface of Inconel 718 superalloy, a nickel plating process was adopted for surface modification of the superalloys. Under the conditions of 890 °C and 10 min, the influence of nickel plating and different plating thicknesses on the wettability and gap-filling capability of the brazing alloy, as well as the microstructure and mechanical characteristics of the joints, were investigated. An analysis was done on the brazed joints’ microstructural development process and strengthening mechanism. The findings show that nickel plating on the superalloys’ surfaces considerably increases the brazing alloy’s wettability to the substrate and its gap-filling capacity. The gaps between the base materials are closed, and the contact angle between the brazing alloy and the superalloy surface is decreased from 20 to 4°. With an increase in plating thickness, the joint’s shear strength initially rises and subsequently falls. When the plating thickness is 28 μm, the shear strength is increased by 43.5% (from 168 to 241 MPa) compared to the unplated brazed joint.

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Data availability

The data that support the findings of this study are available from the corresponding author, [WM L], upon reasonable request.

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Acknowledgement

We gratefully acknowledge support for this work was supported by Key Research and development projects in Henan province (221111520100) as well as by Henan Province Science and Technology Research and Development Joint Fund (225200810013).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Brazing Filler & Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou, 450001, China

    Ruilin Qiao, Jian Qin, Guanxing Zhang, Weimin Long, Pan Liu & Sujuan Zhong

  2. School of Materials Science and Engineering, University of Science and Technology Bei**g, Bei**g, 100083, China

    Jian Qin

Authors
  1. Ruilin Qiao
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  2. Jian Qin
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  3. Guanxing Zhang
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  4. Weimin Long
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  5. Pan Liu
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  6. Sujuan Zhong
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Contributions

RQ contributed to experimental design; conception; manuscript composition; and carried out measurements. JQ contributed to experimental design; conception; and manuscript revision. GZ contributed to experimental design and conception. WL contributed to experimental design; conception; and funding. PL contributed to experimental design and carried out measurements. SZ contributed to conception and provided funding.

Corresponding author

Correspondence to Weimin Long.

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Handling Editor: Megumi Kawasaki .

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Qiao, R., Qin, J., Zhang, G. et al. Study on the influence of surface nickel plating on the microstructure and mechanical properties of WC-8Co/Inconel 718 brazed joints. J Mater Sci 59, 6525–6536 (2024). https://doi.org/10.1007/s10853-024-09335-8

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  • DOI: https://doi.org/10.1007/s10853-024-09335-8

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