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Unveiling the structural arrangements responsible for the atomic dynamics in metallic glasses during physical aging

Author

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  • V. M. Giordano

    (Institute of Light and Matter, UMR5306 Université Lyon 1-CNRS, Université de Lyon)

  • B Ruta

    (ESRF-The European Synchrotron, CS 40220)

Abstract

Understanding and controlling physical aging, that is, the spontaneous temporal evolution of out-of-equilibrium systems, represents one of the greatest tasks in material science. Recent studies have revealed the existence of a complex atomic motion in metallic glasses, with different aging regimes in contrast with the typical continuous aging observed in macroscopic quantities. By combining dynamical and structural synchrotron techniques, here for the first time we directly connect previously identified microscopic structural mechanisms with the peculiar atomic motion, providing a broader unique view of their complexity. We show that the atomic scale is dominated by the interplay between two processes: rearrangements releasing residual stresses related to a cascade mechanism of relaxation, and medium range ordering processes, which do not affect the local density, likely due to localized relaxations of liquid-like regions. As temperature increases, a surprising additional secondary relaxation process sets in, together with a faster medium range ordering, likely precursors of crystallization.

Suggested Citation

  • 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.
  • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10344
    DOI: 10.1038/ncomms10344
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    Cited by:

    1. 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.

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