On the plasticity event in metallic glass

Weidong Liu, Haihui Ruan, Liangchi Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

Abstract

Based on a systematic molecular dynamics analysis, this study reveals that plastic deformation of metallic glass is not through a uniform configuration change but via many localized plasticity events. These events are manifested by the atomic clusters of high kinetic energy and high strain rate, emerging even in the elastic deformation regime. The life of such a plasticity event is on the order of 10-12s, during which the distribution of kinetic energy follows a power law. The study shows that yielding in metallic glass occurs at the sudden surge point of the number of plasticity events. In the steady plastic deformation regime, the continuous nucleation and annihilation of the plastic events lead to a steady flow stress and stabilized total potential energy.
Original languageEnglish
Pages (from-to)158-165
Number of pages8
JournalPhilosophical Magazine Letters
Volume93
Issue number3
DOIs
Publication statusPublished - 1 Mar 2013
Externally publishedYes

Keywords

  • metallic glasses
  • molecular dynamics simualtion
  • plastic deformation

ASJC Scopus subject areas

  • Condensed Matter Physics

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