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Distinct relaxation mechanism at room temperature in metallic glass

Author

Listed:
  • Yi-Tao Sun

    (Chinese Academy of Sciences)

  • Rui Zhao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Da-Wei Ding

    (Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Yan-Hui Liu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Hai-Yang Bai

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Mao-Zhi Li

    (Renmin University of China)

  • Wei-Hua Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

Abstract

How glasses relax at room temperature is still a great challenge for both experimental and simulation studies due to the extremely long relaxation time-scale. Here, by employing a modified molecular dynamics simulation technique, we extend the quantitative measurement of relaxation process of metallic glasses to room temperature. Both energy relaxation and dynamics, at low temperatures, follow a stretched exponential decay with a characteristic stretching exponent β = 3/7, which is distinct from that of supercooled liquid. Such aging dynamics originates from the release of energy, an intrinsic nature of out-of-equilibrium system, and manifests itself as the elimination of defects through localized atomic strains. This finding is also supported by long-time stress-relaxation experiments of various metallic glasses, confirming its validity and universality. Here, we show that the distinct relaxation mechanism can be regarded as a direct indicator of glass transition from a dynamic perspective.

Suggested Citation

  • Yi-Tao Sun & Rui Zhao & Da-Wei Ding & Yan-Hui Liu & Hai-Yang Bai & Mao-Zhi Li & Wei-Hua Wang, 2023. "Distinct relaxation mechanism at room temperature in metallic glass," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36300-x
    DOI: 10.1038/s41467-023-36300-x
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    References listed on IDEAS

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    1. Srikanth Sastry & Pablo G. Debenedetti & Frank H. Stillinger, 1998. "Signatures of distinct dynamical regimes in the energy landscape of a glass-forming liquid," Nature, Nature, vol. 393(6685), pages 554-557, June.
    2. Li Zhong & Jiangwei Wang & Hongwei Sheng & Ze Zhang & Scott X. Mao, 2014. "Formation of monatomic metallic glasses through ultrafast liquid quenching," Nature, Nature, vol. 512(7513), pages 177-180, August.
    3. V. M. Giordano & B Ruta, 2016. "Unveiling the structural arrangements responsible for the atomic dynamics in metallic glasses during physical aging," Nature Communications, Nature, vol. 7(1), pages 1-8, April.
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