Relaxation of Ni-free Ti40Zr10Cu36Pd14 bulk metallic glass under mechanical stress
Résumé
Dynamic mechanical behavior of Ti40Zr10Cu36Pd14 bulk metallic glass was investigated by mechanical spectroscopy. The mechanical spectra of Ti40Zr10Cu36Pd14 bulk metallic glass show the main α relaxation while the slow β relaxation is not evident. The isothermal relaxation process of the loss factor tanδ can be well described by the Kohlrausch-Williams-Watts (KWW) stretched exponential relaxation function. In the current study, the stretched exponential relaxation parameter βage remains constant below the glass transition temperature Tg, while the value increases when the temperature approaches Tg. In addition, atomic mobility of the Ti40Zr10Cu36Pd14 bulk metallic glass decreases during the physical aging. © 2018 Elsevier Ltd
Mots clés
Anelastic relaxation
Copper alloys
Dynamic mechanical analysis
Dynamics
Glass
Glass transition
Metals
Palladium alloys
Relaxation processes
Titanium alloys
Zirconium alloys
Atomic mobility
Bulk metallic glass
Dynamic mechanical behavior
Glass transition temperature Tg
Isothermal relaxation
Mechanical spectroscopy
Mechanical spectrum
Stretched exponential relaxations
Metallic glass