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Extreme rejuvenation and softening in a bulk metallic glass

Author

Listed:
  • J. Pan

    (Chinese Academy of Sciences)

  • Y. X. Wang

    (Chinese Academy of Sciences)

  • Q. Guo

    (Shanghai Jiao Tong University)

  • D. Zhang

    (Shanghai Jiao Tong University)

  • A. L. Greer

    (University of Cambridge)

  • Y. Li

    (Chinese Academy of Sciences)

Abstract

Rejuvenation of metallic glasses, bringing them to higher-energy states, is of interest in improving their plasticity. The mechanisms of rejuvenation are poorly understood, and its limits remain unexplored. We use constrained loading in compression to impose substantial plastic flow on a zirconium-based bulk metallic glass. The maximum measured effects are that the hardness of the glass decreases by 36%, and its excess enthalpy (above the relaxed state) increases to 41% of the enthalpy of melting. Comparably high degrees of rejuvenation have been reported only on microscopic scales at the centre of shear bands confined to low volume fractions. This extreme rejuvenation of a bulk glass gives a state equivalent to that obtainable by quenching the liquid at ~1010 K s–1, many orders of magnitude faster than is possible for bulk specimens. The contrast with earlier results showing relaxation in similar tests under tension emphasizes the importance of hydrostatic stress.

Suggested Citation

  • J. Pan & Y. X. Wang & Q. Guo & D. Zhang & A. L. Greer & Y. Li, 2018. "Extreme rejuvenation and softening in a bulk metallic glass," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-02943-4
    DOI: 10.1038/s41467-018-02943-4
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    Cited by:

    1. Yang Yang & Sheng Yin & Qin Yu & Yingxin Zhu & Jun Ding & Ruopeng Zhang & Colin Ophus & Mark Asta & Robert O. Ritchie & Andrew M. Minor, 2024. "Rejuvenation as the origin of planar defects in the CrCoNi medium entropy alloy," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Naijia Liu & Sungwoo Sohn & Min Young Na & Gi Hoon Park & Arindam Raj & Guannan Liu & Sebastian A. Kube & Fusen Yuan & Yanhui Liu & Hye Jung Chang & Jan Schroers, 2023. "Size-dependent deformation behavior in nanosized amorphous metals suggesting transition from collective to individual atomic transport," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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