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Strain induced fragility transition in metallic glass

Author

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  • Hai-Bin Yu

    (Physikalisches Institut, Universität Göttingen
    Present address: Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, USA)

  • Ranko Richert

    (Arizona State University)

  • Robert Maaß

    (Institute for Materials Physics, University of Göttingen)

  • Konrad Samwer

    (Physikalisches Institut, Universität Göttingen)

Abstract

Relaxation dynamics are the central topic in glassy physics. Recently, there is an emerging view that mechanical strain plays a similar role as temperature in altering the relaxation dynamics. Here, we report that mechanical strain in a model metallic glass modulates the relaxation dynamics in unexpected ways. We find that a large strain amplitude makes a fragile liquid become stronger, reduces dynamical heterogeneity at the glass transition and broadens the loss spectra asymmetrically, in addition to speeding up the relaxation dynamics. These findings demonstrate the distinctive roles of strain compared with temperature on the relaxation dynamics and indicate that dynamical heterogeneity inherently relates to the fragility of glass-forming materials.

Suggested Citation

  • Hai-Bin Yu & Ranko Richert & Robert Maaß & Konrad Samwer, 2015. "Strain induced fragility transition in metallic glass," Nature Communications, Nature, vol. 6(1), pages 1-6, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8179
    DOI: 10.1038/ncomms8179
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