Abstract
The free volume model is applied to isothermal relaxation and hightemperature creep. For this analysis, the time dependent flow behaviourof Zr55Cu30Al10Ni5 bulk metallic glass (BMG) near the glass transition temperature (T g ) is expressed as a trade off between stress inducedgeneration and diffusion controlled annihilation of free volume. Thestrain rate-stress relation over a wide strain rate-range (10−7to 10−2 s−1) was established for three different temperatures near T g . It was found that the thermal relaxation behaviour and creep kinetics arecontrolled by the mobility of atoms with an activation energy of 161 kJ/mol.
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Daniel, B., Reger-Leonhard, A., Heilmaier, M. et al. Thermal Relaxation and High Temperature Creep of Zr55Cu30Al10Ni5 Bulk Metallic Glass. Mechanics of Time-Dependent Materials 6, 193–206 (2002). https://doi.org/10.1023/A:1015045324786
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DOI: https://doi.org/10.1023/A:1015045324786