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A high-strength silicide phase in a stainless steel alloy designed for wear-resistant applications

Author

Listed:
  • D. Bowden

    (The University of Manchester)

  • Y. Krysiak

    (Johannes Gutenberg University Mainz)

  • L. Palatinus

    (Institute of Physics)

  • D. Tsivoulas

    (The University of Manchester
    Wood plc)

  • S. Plana-Ruiz

    (Johannes Gutenberg University Mainz
    University of Barcelona)

  • E. Sarakinou

    (The University of Manchester
    University of Bristol)

  • U. Kolb

    (Johannes Gutenberg University Mainz)

  • D. Stewart

    (Rolls-Royce plc)

  • M. Preuss

    (The University of Manchester)

Abstract

Hardfacing alloys provide strong, wear-resistant and corrosion-resistant coatings for extreme environments such as those within nuclear reactors. Here, we report an ultra-high-strength Fe–Cr–Ni silicide phase, named π-ferrosilicide, within a hardfacing Fe-based alloy. Electron diffraction tomography has allowed the determination of the atomic structure of this phase. Nanohardness testing indicates that the π-ferrosilicide phase is up to 2.5 times harder than the surrounding austenite and ferrite phases. The compressive strength of the π-ferrosilicide phase is exceptionally high and does not yield despite loading in excess of 1.6 GPa. Such a high-strength silicide phase could not only provide a new type of strong, wear-resistant and corrosion-resistant Fe-based coating, replacing more costly and hazardous Co-based alloys for nuclear applications, but also lead to the development of a new class of high-performance silicide-strengthened stainless steels, no longer reliant on carbon for strengthening.

Suggested Citation

  • D. Bowden & Y. Krysiak & L. Palatinus & D. Tsivoulas & S. Plana-Ruiz & E. Sarakinou & U. Kolb & D. Stewart & M. Preuss, 2018. "A high-strength silicide phase in a stainless steel alloy designed for wear-resistant applications," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03875-9
    DOI: 10.1038/s41467-018-03875-9
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    Cited by:

    1. Shucai Zhang & Hao Feng & Huabing Li & Zhouhua Jiang & Tao Zhang & Hongchun Zhu & Yue Lin & Wei Zhang & Guoping Li, 2023. "Design for improving corrosion resistance of duplex stainless steels by wrapping inclusions with niobium armour," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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