Low temperature uniform plastic deformation of metallic glasses during elastic iteration

Takeshi Fujita, Zheng Wang, Yanhui Liu, Howard Sheng, Weihua Wang, Mingwei Chen

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Molecular dynamics simulations and dynamic mechanical analysis experiments were employed to investigate the mechanical behavior of metallic glasses subjected to iteration deformation in a nominally elastic region. It was found that cyclic deformation leads to the formation of irreversible shear transformation zones (STZs) and a permanent uniform strain. The initiation of STZs is directly correlated with the atomic heterogeneity of the metallic glass and the accumulated permanent strain has a linear relation with the number of STZs. This study reveals a new deformation mode and offers insights into the atomic mechanisms of STZ formation and low temperature uniform plastic deformation of metallic glasses.

Original languageEnglish
Pages (from-to)3741-3747
Number of pages7
JournalActa Materialia
Volume60
Issue number9
DOIs
Publication statusPublished - 2012 May

Keywords

  • Metallic glasses
  • Plastic deformation
  • Simulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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