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Elastic and Dissipative Properties of Amorphous and Nanocrystalline Mg-Ni-Y Alloy

Published online by Cambridge University Press:  10 February 2011

N. P. Kobelev
Affiliation:
Institute of Solid State Physics, RAC, Chernogolovka 142432, Moscow region, Russia
A. N. Manukhin
Affiliation:
Institute of Metal Physics, RAC, Kovalevskaya Str., Ekaterinburg 620219, Russia
E. Korin
Affiliation:
Institute of Solid State Physics, RAC, Chernogolovka 142432, Moscow region, Russia
L. Soifer
Affiliation:
Department of Chemical Engineering, Ben-Gurion University of the Negev, P.O. Box 653 84105, Israel
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Abstract

The internal friction and Young's modulus of amorphous Mg84Ni12.5Y3.5 alloy obtained by the melt spinning technique have been measured by a vibrating reed method at frequency of 250 Hz at heating and cooling runs in the temperature range from 300K to 625K.. The crystallization kinetics of the alloy was studied by the calorimetric methods (DSC and DTA). The structure of the samples was determined by the x-ray diffraction technique. The Young modulus measurements have revealed the irreversible multi-step changes (up to 50%) accompanied by the irreversible internal friction peaks. These changes were observed in the same temperature intervals where the anomalies of thermal properties were found out. The results obtained are explained by the structural rearrangement from amorphous to nanocrystalline state during the annealing.

Type
Research Article
Copyright
Copyright © Materials Research Society 1999

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