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A High-Strength High-Ductility Ti- and Mo-Bearing Ferritic Steel

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Abstract

This study reports the development of a Ti- and Mo-bearing ferritic steel precipitation-strengthened by nanometer-sized carbides. The steel showed an ultimate tensile strength of 995 MPa, a tensile elongation of 20 pct, and a hole-expanding ratio of 44 pct. The precipitation of nanometer-sized carbides in this steel during isothermal transformation at 873 K, 898 K, and 973 K (600 °C, 625 °C, and 700 °C) for 60 minutes was investigated in detail. The contributions of various strengthening mechanisms were analyzed, and the maximum contribution from the nanometer-sized carbide precipitates was estimated to be about 430 MPa.

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Acknowledgment

The authors thank the National Natural Science Foundation of China (No. 51271035) for financial support.

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Authors and Affiliations

  1. China Electric Power Research Institute, Beijing, 100192, China

    Yao Huang (Intermediate Engineer), Xuming Wang (Junior Engineer), Jingbo Yang (Professor of Engineering), Junke Han (Vice-Senior Engineer) & Fengli Yang (Vice-Senior Engineer)

  2. Engineering Research Institute, University of Science and Technology Beijing, Beijing, 100083, China

    Yao Huang (Intermediate Engineer), Aimin Zhao (Professor) & Xiaopei Wang (Junior Engineer)

  3. Beijing Laboratory for Modern Transportation Advanced Metal Materials and Processing Technology, Beijing, 100083, China

    Aimin Zhao (Professor)

  4. China Electric Power Research Institute, Beijing, 100055, China

    Yao Huang (Intermediate Engineer), Xuming Wang (Junior Engineer), Jingbo Yang (Professor of Engineering), Junke Han (Vice-Senior Engineer) & Fengli Yang (Vice-Senior Engineer)

Authors
  1. Yao Huang
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  2. Aimin Zhao
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  3. Xiaopei Wang
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  4. Xuming Wang
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  5. Jingbo Yang
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  7. Fengli Yang
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Corresponding author

Correspondence to Yao Huang.

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Manuscript submitted October 28, 2014.

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Huang, Y., Zhao, A., Wang, X. et al. A High-Strength High-Ductility Ti- and Mo-Bearing Ferritic Steel. Metall Mater Trans A 47, 450–460 (2016). https://doi.org/10.1007/s11661-015-3232-6

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  • DOI: https://doi.org/10.1007/s11661-015-3232-6

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