Poisson's ratio and fragility of bulk metallic glasses

J. H. Na, E. S. Park, Y. C. Kim, E. Fleury, W. T. Kim, D. H. Kim

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The correlation among apparent global plasticity, Poisson's ratio, and fragility in monolithic bulk metallic glass (BMG) alloys has been investigated in the present study. The shear and bulk moduli in monolithic Cu-based BMG alloys have been measured by resonant ultrasound spectroscopy (RUS) and ultrasonic technique. The Cu43 Zr43Al7Ag7 BMG alloy showing a large apparent global plasticity (∼8%) exhibits a high Poisson's ratio when compared with that of Cu43Zr43 Al7Be7 BMG alloy. In addition, the fragility of Cu-based BMG alloys can be obtained by differential scanning calorimetry (DSC). The fragility index m of Cu43 Zr43Al7Ag7 BMG alloy is slightly larger than that of Cu43Zr43 Al7Be7 BMG alloy. The correlation between Poisson's ratio and fragility in BMG alloys can be presented by a simple relation of m - 17 = 14 (B/G - 1). Poisson's ratio and fragility might be regarded as an important parameter that controls global plasticity of glass-forming alloys.

Original languageEnglish
Pages (from-to)523-528
Number of pages6
JournalJournal of Materials Research
Volume23
Issue number2
DOIs
Publication statusPublished - 2008 Feb 1

Fingerprint

Metallic glass
Poisson ratio
metallic glasses
plastic properties
Plasticity
Elastic moduli
Ultrasonics
bulk modulus
Differential scanning calorimetry
heat measurement
ultrasonics
Spectroscopy
shear
Glass
scanning
glass

All Science Journal Classification (ASJC) codes

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

Cite this

Na, J. H. ; Park, E. S. ; Kim, Y. C. ; Fleury, E. ; Kim, W. T. ; Kim, D. H. / Poisson's ratio and fragility of bulk metallic glasses. In: Journal of Materials Research. 2008 ; Vol. 23, No. 2. pp. 523-528.
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Na, JH, Park, ES, Kim, YC, Fleury, E, Kim, WT & Kim, DH 2008, 'Poisson's ratio and fragility of bulk metallic glasses', Journal of Materials Research, vol. 23, no. 2, pp. 523-528. https://doi.org/10.1557/jmr.2008.0060

Poisson's ratio and fragility of bulk metallic glasses. / Na, J. H.; Park, E. S.; Kim, Y. C.; Fleury, E.; Kim, W. T.; Kim, D. H.

In: Journal of Materials Research, Vol. 23, No. 2, 01.02.2008, p. 523-528.

Research output: Contribution to journalArticle

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