Relaxation and Strain-Hardening Relationships in Highly Rejuvenated Metallic Glasses

Xudong Yuan, Daniel Şopu, Kaikai Song, Jürgen Eckert

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1 Citation (Scopus)

Abstract

One way to rejuvenate metallic glasses is to increase their free volume. Here, by randomly removing atoms from the glass matrix, free volume is homogeneously generated in metallic glasses, and glassy states with different degrees of rejuvenation are designed and further mechanically tested. We find that the free volume in the rejuvenated glasses can be annihilated under tensile or compressive deformation that consequently leads to structural relaxation and strain-hardening. Additionally, the deformation mechanism of highly rejuvenated metallic glasses during the uniaxial loading–unloading tensile tests is investigated, in order to provide a systematic understanding of the relaxation and strain-hardening relationship. The observed strain-hardening in the highly rejuvenated metallic glasses corresponds to stress-driven structural and residual stress relaxation during cycling deformation. Nevertheless, the rejuvenated metallic glasses relax to a more stable state but could not recover their initial as-cast state.
Original languageEnglish
Article number1702
Number of pages10
Journal Materials
Volume15.2022
Issue number5
DOIs
Publication statusPublished - 24 Feb 2022

Bibliographical note

Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • Metallic glass
  • Molecular dynamics simulations
  • Rejuvenation
  • Relaxation
  • Strain-hardening

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