Jeong, H. T. Fleury, E. Kim, W. T. Kim, D. H. 2024-01-21T00:04:25Z 2024-01-21T00:04:25Z 2021-09-02 2007-12 1598-9623 https://pubs.kist.re.kr/handle/201004/133948 The dynamic mechanical properties of a (Zr77.5Ti22.5)(55)(Ni48Cu52)(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. lsothennal multi-frequency measurement data were used to construct the master curves of the elastic moduli and tan delta 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,, the fragility index of this alloy was estimated. English KOREAN INST METALS MATERIALS BULK METALLIC-GLASS MOLD CASTING METHOD SUPERCOOLED LIQUIDS VISCOELASTIC PROPERTIES TEMPERATURE-DEPENDENCE STRUCTURAL RELAXATION FORMING ABILITY TRANSITION VISCOSITY POLYMERS Mechanical relaxations of a (Zr77.5Ti22.5)(55)(Ni48Cu52)(21.25)Be-23.75 amorphous alloy studied using dynamic mechanical analysis Article 10.3365/Met.Mat.2007.12.447 1 METALS AND MATERIALS INTERNATIONAL, v.13, no.6, pp.447 - 453 METALS AND MATERIALS INTERNATIONAL 13 6 447 453 scie scopus kci ART001210516 000253131300002 2-s2.0-38349172923 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article BULK METALLIC-GLASS MOLD CASTING METHOD SUPERCOOLED LIQUIDS VISCOELASTIC PROPERTIES TEMPERATURE-DEPENDENCE STRUCTURAL RELAXATION FORMING ABILITY TRANSITION VISCOSITY POLYMERS dynamic mechanical analysis time-temperature superposition (TTS) principle amorphous alloy mechanical relaxation fragility index