Mechanical relaxations of a (Zr 77.5 Ti 22.5 ) 55 (Ni 48 Cu 52 ) 21.25 Be 23.75 amorphous alloy studied using dynamic mechanical analysis

H. T. Jeong, E. Fleury, W. T. Kim, Do Hyang Kim

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The dynamic mechanical properties of a (Zr 77.5 Ti 22.5 ) 55 (Ni 48 Cu 52 ) 21.25 Be 23.75 amorphous alloy were investigated by frequency-dependent elastic moduli and isothermal multi-frequency measurements. The frequency-dependent loss modulus showed a relaxation behavior resulting from a glass transition, and the variation of the peak frequency was related to the Arrhenius equation. Isothermal multi-frequency measurement data were used to construct the master curves of the elastic moduli and tan δ by applying the time-temperature superposition principle. The temperature dependence of the shift factor was found to follow the Arrhenius relationship, and the activation energies for the low temperature relaxation and glass transition were approximately 156.6 kJ/mol and 554 kJ/mol, respectively. The glass transition temperature (T g ) was manifested by the crossover region of the shift factor dependence, and from the relationship between the shift factors and the temperature above T g , the fragility index of this alloy was estimated.

Original languageEnglish
Pages (from-to)447-453
Number of pages7
JournalMetals and Materials International
Volume13
Issue number6
DOIs
Publication statusPublished - 2007 Jan 1

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Anelastic relaxation
Amorphous alloys
Dynamic mechanical analysis
frequency measurement
shift
modulus of elasticity
Glass transition
glass
Elastic moduli
Temperature
glass transition temperature
crossovers
mechanical properties
activation energy
temperature dependence
temperature
Activation energy
curves
Mechanical properties

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

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abstract = "The dynamic mechanical properties of a (Zr 77.5 Ti 22.5 ) 55 (Ni 48 Cu 52 ) 21.25 Be 23.75 amorphous alloy were investigated by frequency-dependent elastic moduli and isothermal multi-frequency measurements. The frequency-dependent loss modulus showed a relaxation behavior resulting from a glass transition, and the variation of the peak frequency was related to the Arrhenius equation. Isothermal multi-frequency measurement data were used to construct the master curves of the elastic moduli and tan δ by applying the time-temperature superposition principle. The temperature dependence of the shift factor was found to follow the Arrhenius relationship, and the activation energies for the low temperature relaxation and glass transition were approximately 156.6 kJ/mol and 554 kJ/mol, respectively. The glass transition temperature (T g ) was manifested by the crossover region of the shift factor dependence, and from the relationship between the shift factors and the temperature above T g , the fragility index of this alloy was estimated.",
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Mechanical relaxations of a (Zr 77.5 Ti 22.5 ) 55 (Ni 48 Cu 52 ) 21.25 Be 23.75 amorphous alloy studied using dynamic mechanical analysis . / Jeong, H. T.; Fleury, E.; Kim, W. T.; Kim, Do Hyang.

In: Metals and Materials International, Vol. 13, No. 6, 01.01.2007, p. 447-453.

Research output: Contribution to journalArticle

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