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On the free volume kinetics during isochronal structural relaxation of Pd-based metallic glass: effect of temperature and deformation |
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| Authors: | K Hajlaoui M A Yousfi Z Tourki G Vaughan and A R Yavari |
| Affiliation: | (1) SIMaP-LTPCM, Institut National Polytechnique de Grenoble, 38402 Saint Martin d’Heres, France;(2) LGM-MA05, ENIM, Av. Ibn El Jazzar, 5019 Monastir, Tunisia;(3) Ecole Nationale d’Ing?nieurs de Sousse, Avenue 18 janvier, 4000 BabJdid, Tunisia;(4) LMMP LAB-STI03, Universit? de Tunis, ESSTT, 1008 Tunis, Tunsia;(5) European Synchrotron Radiation Facilities (ESRF), 38402 Grenoble, France |
| Abstract: | Free volume changes of amorphous Pd42.5Cu30Ni7.5P20 due to structural relaxation under isochronal heat treatments have been quantified using in situ synchrotron X-ray diffraction measurements. The analysis of the first diffraction peak position during the annealing process has allowed us to follow the free volume change during relaxation. The data obtained were successfully fitted to relaxation equations based on free volume model (FVM) and the drawn conclusion is that the FVM remain a useful tool for describing the relaxation phenomena in metallic glasses well below glass transition. The effect of deformation and temperature on kinetics of structural relaxation of the amorphous structure has been quantitatively investigated. |
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