Propagation of shear bands in metallic glasses and transition from serrated to non-serrated plastic flow at low temperatures

A. Vinogradov, A. Lazarev, D. V. Louzguine-Luzgin, Y. Yokoyama, S. Li, A. R. Yavari, A. Inoue

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

The mechanical behavior and the kinetics of shear banding in bulk metallic glasses was investigated at room and liquid nitrogen temperature using the acoustic emission (AE) technique. It was demonstrated that the intensive AE reflecting the activity of strongly localized shear bands at room temperature vanishes at the transition of plastic flow from serrated to non-serrated with a reduction in temperature. The disappearance of AE clearly suggests that the shear band propagation velocity significantly decreases at low temperature, and sliding along the principle shear band is observed at the machine-driven rate.

Original languageEnglish
Pages (from-to)6736-6743
Number of pages8
JournalActa Materialia
Volume58
Issue number20
DOIs
Publication statusPublished - 2010 Dec

Keywords

  • Acoustic emission
  • Metallic glasses
  • Serrated plastic flow
  • Shear bands

ASJC Scopus subject areas

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

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