Prediction of pressure-promoted thermal rejuvenation in metallic glasses

Narumasa Miyazaki, Masato Wakeda, Yun Jiang Wang, Shigenobu Ogata

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Rejuvenation is the structural excitation of glassy materials, and is a promising approach for improving the macroscopic deformability of metallic glasses. This atomistic study proposes the application of compressive hydrostatic pressure during the glass-forming quenching process and demonstrates highly rejuvenated glass states that have not been attainable without the application of pressure. Surprisingly, the pressure-promoted rejuvenation process increases the characteristic short- and medium-range order, even though it leads to a higher-energy glassy state. This 'local order'-'energy' relation is completely opposite to conventional thinking regarding the relation, suggesting the presence of a well-ordered high-pressure glass/high-energy glass phase. We also demonstrate that the rejuvenated glass made by the pressure-promoted rejuvenation exhibits greater plastic performance than as-quenched glass, and greater strength and stiffness than glass made without the application of pressure. It is thus possible to tune the mechanical properties of glass using the pressure-promoted rejuvenation technique.

Original languageEnglish
Article number16013
Journalnpj Computational Materials
Volume2
DOIs
Publication statusPublished - 2016 Jun 24

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Computer Science Applications

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