Another clue to understand the yield phenomenon at the glassy state in a Zr55Al10Ni5Cu30 metallic glass

Hidemi Kato, Hitoshi Igarashi, Akihisa Inoue

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

In the glassy temperature region from ambient to the glass transition temperature (Tg), an apparent Young's modulus (Eap), the slope of the initial linear part on the stress-strain curve, in a Zr-based metallic glass clearly depends on both temperature and strain rate, especially above 0.87 Tg. This indicates that viscous contribution is included in this apparent elastic response. If yield strain is deduced with Young's modulus measured by the ultrasonic vibration method, which excludes the viscous contribution, temperature dependence of the yield strain can be captured well with the Argon's Shear Transformation Zone (STZ) model. On the other hand if the yield strain is deduced with Eap, the strain was found to keep the "universal" critical value ∼ 0.020 for many metallic glasses at the ambient temperature. This may indicate another clue to understand the yield mechanism on BMG.

Original languageEnglish
Pages (from-to)1592-1594
Number of pages3
JournalMaterials Letters
Volume62
Issue number10-11
DOIs
Publication statusPublished - 2008 Apr 15

Keywords

  • Mechanical properties
  • Metallic glass
  • Viscoelasticity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Another clue to understand the yield phenomenon at the glassy state in a Zr<sub>55</sub>Al<sub>10</sub>Ni<sub>5</sub>Cu<sub>30</sub> metallic glass'. Together they form a unique fingerprint.

  • Cite this