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In Situ Observation of Phase Transformations in the Weld Metal of EH420 Shipbuilding Steel Subjected to Varied Heat Inputs

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Abstract

Salient phase transformations in the weld metal of EH420 shipbuilding steel with various heat inputs were observed by confocal scanning laser microscope. Under lower heat inputs, bainite laths prefer to form on austenite grain boundaries. When the heat input reaches 15 kJ/mm, ferrite side plates and acicular ferrites are found to be more conveniently formed on austenite grain boundaries and inclusions, respectively. Further increasing the heat input may drive bainite to vanish completely.

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Acknowledgments

The authors gratefully acknowledge the support from the National Natural Science Foundation of China (Grant Nos. U20A20277, 52050410341 and 52011530180), and Research Fund for Central Universities (Grant Nos. N2025025 and N2125016).

Conflict of interest

No potential conflict of interest was reported by the author(s).

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Authors and Affiliations

  1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang, 110819, P.R. China

    Xu Xie, Ming Zhong & Cong Wang

  2. School of Metallurgy, Northeastern University, Shenyang, 110819, P.R. China

    Xu Xie, Ming Zhong & Cong Wang

  3. Rizhao Steel Yingkou Medium Plate Co., Ltd., Yingkou, 115005, P.R. China

    Pengfei Zhao & Hao Yu

Authors
  1. Xu Xie
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  2. Ming Zhong
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  3. Pengfei Zhao
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  4. Hao Yu
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  5. Cong Wang
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Correspondence to Cong Wang.

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Xie, X., Zhong, M., Zhao, P. et al. In Situ Observation of Phase Transformations in the Weld Metal of EH420 Shipbuilding Steel Subjected to Varied Heat Inputs. Metall Mater Trans A 54, 2532–2538 (2023). https://doi.org/10.1007/s11661-023-07071-3

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