Abstract
Measurements of the dynamic shear modulus and of the internal friction are performed in a bulk amorphous Zr 57–Ti 5–Cu 20–Ni 8–Al 10 (at.%) alloy, both during heating and cooling with different cooling rates and different frequencies. The kinetic aspect of the glass transition is demonstrated. The onset of the crystallisation process induces a modulus increase and an internal friction decrease, due to the decrease of the atomic mobility resulting from the crystallisation process. Experimental results are well described using a physical model of the mechanical response of the amorphous material and especially of the characteristic times of the atomic mobility.
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