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

doi:10.1557/jmr.2008.0060

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	523-528
Number of pages	6
Journal	Journal of Materials Research
Volume	23
Issue number	2
DOIs	https://doi.org/10.1557/jmr.2008.0060
Publication status	Published - 2008 Feb

All Science Journal Classification (ASJC) codes

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

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title = "Poisson's ratio and fragility of bulk metallic glasses",

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.",

author = "Na, {J. H.} and Park, {E. S.} and Kim, {Y. C.} and E. Fleury and Kim, {W. T.} and Kim, {D. H.}",

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T1 - Poisson's ratio and fragility of bulk metallic glasses

AU - Na, J. H.

AU - Park, E. S.

AU - Kim, Y. C.

AU - Fleury, E.

AU - Kim, W. T.

AU - Kim, D. H.

PY - 2008/2

Y1 - 2008/2

N2 - 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.

AB - 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.

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