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Interface dominated cooperative nanoprecipitation in interstitial alloys

Author

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  • Hongcai Wang

    (Institut für Werkstoffe, Ruhr-Universität Bochum)

  • Xie Zhang

    (Materials Department, University of California)

  • Dingshun Yan

    (Institute of Mechanics, Chinese Academy of Sciences)

  • Christoph Somsen

    (Institut für Werkstoffe, Ruhr-Universität Bochum)

  • Gunther Eggeler

    (Institut für Werkstoffe, Ruhr-Universität Bochum)

Abstract

Steels belong to one of the best established materials, however, the mechanisms of various phase transformations down to the nano length scale are still not fully clear. In this work, high-resolution transmission electron microscopy is combined with atomistic simulations to study the nanoscale carbide precipitation in a Fe–Cr–C alloy. We identify a cooperative growth mechanism that connects host lattice reconstruction and interstitial segregation at the growing interface front, which leads to a preferential growth of cementite (Fe3C) nanoprecipitates along a particular direction. This insight significantly improves our understanding of the mechanisms of nanoscale precipitation in interstitial alloys, and paves the way for engineering nanostructures to enhance the mechanical performance of alloys.

Suggested Citation

  • Hongcai Wang & Xie Zhang & Dingshun Yan & Christoph Somsen & Gunther Eggeler, 2018. "Interface dominated cooperative nanoprecipitation in interstitial alloys," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06474-w
    DOI: 10.1038/s41467-018-06474-w
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