Low-temperature anomaly of plasticity of Zr64,13Cu 15,75Ni10,12Al10 bulk metallic glass

E. D. Tabachnikova, A. V. Podolskiy, V. Z. Bengus, S. N. Smirnov, D. V. Luzgin, A. Inoue

Research output: Contribution to journalArticlepeer-review

Abstract

Compression plastic deformation and failure of cylindrical samples of Zr64.13Cu15.75Ni10.12Al10 bulk metallic glass were studied in the temperature range of 300-4.2 K. At temperature T = 300 K the deformation curve is serrated due to the propagation of narrow shear bands. At a deformation level of about 3-4% a catastrophic, uncontrolled failure of the specimens occurs resulting from the propagation of the macroscopic shear band at a rate ∼ 103 m/s comparable with the sound velocity. A decrease of temperature from 300 K down to 170 and 77 K changes the type of deformation curves from the jump-like type to a smooth one. An interesting low-temperature anomaly of the deformation process has been registered: at temperatures of 170 and 77 K a «slow» propagation of the single macroscopic shear band at a rate of about 10-6 m/s is observed. Cooling down to 4.2 K causes the macroscopic plasticity of the specimens to disappear, and their failure results (as in the case of 300 K) from the propagation of the catastrophic shear band at a nearsonic velocity.

Original languageEnglish
Pages (from-to)856-859
Number of pages4
JournalFizika Nizkikh Temperatur (Kharkov)
Volume34
Issue number8
Publication statusPublished - 2008 Aug 1
Externally publishedYes

Keywords

  • Bulk metallic glasses
  • Low temperatures
  • Mechanical properties

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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