Anomalous decrease of propagation rate of the macroscopic shear band in the Zr-based bulk metallic glasses at temperatures 170 and 77 K

E. D. Tabachnikova, A. V. Podolskiy, V. Z. Bengus, S. N. Smirnov, K. Y. Chernokhvostenko, A. Yavari, D. V. Luzgin, A. Inoue

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4 Citations (Scopus)

Abstract

The plastic deformation and fracture of cylindrical samples of the bulk metallic glasses Zr62Cu15.5Ni12.5Al10 and Zr64.13Cu15.75Ni10.12Al10 have been studied in uniaxial compression in the temperature range 300-4.2 K. At the temperature 300 K the deformation curve has serrated (jump-like) type, caused by the propagation of narrow shear bands. At the deformation level of approximately 3-4% the catastrophic, uncontrolled failure of the specimens occurs resulting from propagation of the macroscopic shear band with a rate ∼103 m/s, which is comparable with the sound velocity. A decrease of the temperature from 300 K down to 170 and 77 K changes the type of deformation curves from a jump-like to a smooth one. An interesting low temperature anomaly of deformation process was found: "slow" (with a rate of approximately 10-6 m/s) propagation of a single macroscopic shear band is observed at 170 and 77 K. When the samples are cooled to 4.2 K their macroscopic plasticity vanishes, and they undergo fracture, just as at 300 K, as a result of the propagation of the catastrophic shear band with nearly sound speed.

Original languageEnglish
Pages (from-to)345-347
Number of pages3
JournalJournal of Alloys and Compounds
Volume495
Issue number2
DOIs
Publication statusPublished - 2010 Apr 16

Keywords

  • Bulk metallic glasses
  • Low temperatures
  • Mechanical properties

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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