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The influence of Si content on precipitation behavior and high-temperature mechanical stability in ERNiMo-2 deposited metal

  • Metals & corrosion
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Abstract

Microalloying is an effective method to regulate the mechanical properties of deposited metal. In this paper, ERNiMo-2 deposited metals with different Si content were prepared. The influence of Si element and thermal exposure treatment on microstructure evolution and high-temperature mechanical properties of ERNiMo-2 deposited metal was investigated. The results show that the size and distribution density of eutectic carbides increased significantly with the addition of Si while more M2C nano-sized carbide particles were observed around the eutectic carbide. Thermal exposure treatment hardly influence the size and distribution of the eutectic carbides, but significantly promote the formation of nano-sized carbide particles. The tensile results at 700 °C show that the density of precipitated carbides and the yield strength of deposited metal increased significantly with the increase of Si content. The thermal exposure would soften the deposited metal because of the obvious decrease of dislocation density and the unobvious strengthening effect from nano-sized carbide particles. The research results are significant for optimizing the composition of ERNiMo-2 welding wire and improving the mechanical performance of welded components.

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Acknowledgements

The authors gratefully acknowledge the financial support for this work from the National Natural Science Foundation of China (Grant Nos. U2032205 and 52171023), National Key Research and Development Program of China (No. 2021YFB3700602), Shanghai Outstanding Academic Leaders Plan (21XD1404300).

Funding

National Natural Science Foundation of China, Zhijun Li (U2032205), Li Jiang (52171023). National Key Research and Development Program of China, Zhijun Li (2021YFB3700602). Shanghai Outstanding Academic Leaders Plan, Zhijun Li (21XD1404300).

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Authors and Affiliations

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, People’s Republic of China

    Yucheng Zhu, Qingchun Zhu, Li Jiang, Jiaoyang Wang, Yuanwen Wang & Zhijun Li

  2. Shanghai Institute of Applied Physics, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

    Yucheng Zhu, Jiaoyang Wang & Yuanwen Wang

  3. Shanghai Construction Engineering Group Co., Shanghai, 200085, People’s Republic of China

    Guoyun Zhao

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  1. Yucheng Zhu
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  2. Qingchun Zhu
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  4. Li Jiang
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Contributions

Yucheng Zhu contributed to the conceptualization, investigation, and writing—original draft. Qingchun Zhu was involved in the validation and writing—review and editing. Li Jiang assisted in the funding acquisition and writing—review and editing. Guoyun Zhao contributed to the writing—review and editing. Jiaoyang Wang was involved in writing—review and editing. Yuanwen Wang contributed to the writing—review and editing. Zhijun Li assisted in the funding acquisition and writing—review and editing.

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Correspondence to Qingchun Zhu or Zhijun Li.

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Handling Editor: Zhao Shen.

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Zhu, Y., Zhu, Q., Zhao, G. et al. The influence of Si content on precipitation behavior and high-temperature mechanical stability in ERNiMo-2 deposited metal. J Mater Sci 59, 11983–11997 (2024). https://doi.org/10.1007/s10853-024-09730-1

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