Correlation between Viscoelastic Moduli and Atomic Rearrangements in Metallic Glasses

Hai Bin Yu, Ranko Richert, Konrad Samwer

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Dynamical moduli, such as storage and loss moduli, characterize the viscoelasticity of materials (i.e., time-dependent elasticity) and convey important information about the relaxation processes of glasses and supercooled liquids. A fundamental question is what ultimately determines them in glassy materials. Here, for several model metallic glasses, we demonstrate that both the storage and loss moduli are uniquely determined by the most probable atomic nonaffine displacements, regardless of temperature or frequency. Moreover, the fast-moving atoms (which contribute to dynamical heterogeneity) do not contribute explicitly to the moduli. Our findings provide a physical basis for the origin of viscoelasticity in metallic glasses.

Original languageEnglish (US)
Pages (from-to)3747-3751
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume7
Issue number19
DOIs
StatePublished - Oct 6 2016

ASJC Scopus subject areas

  • Materials Science(all)

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