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Internal Friction and Elastic Modulus Change Associated with Structural Relaxation and Crystallization in Amorphous Mg-Ni-Y Alloys.

Published online by Cambridge University Press:  17 March 2011

Y. M. Soifer ,
N. P. Kobelev ,
E. Korin ,
L. Soifer ,
D. Mogilyanskii  and
A. Bettelheim
N. P. Kobelev
Affiliation:
Institute of Solid State Physics, RAC, Chernogolovka 142432, Moscow region, Russia
A. Bettelheim
Affiliation:
Department of Chemical Engineering, Ben-Gurion University of the Negev, P.O. Box 653 84105, Israel
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Abstract

Mechanical spectroscopy technique has been applied to investigation of structural relaxation and crystallization of Mg-Ni-Y amorphous alloys of different composition. The composition of the alloys was varied due to change of yttrium concentration from 0 to 7 at.%. The internal friction (IF) and Young's modulus have been measured by a vibrating reed method at frequency of ∼200 Hz at heating and cooling runs in the temperature range from 300K to 650K. Crystallization kinetic studies of the alloys by DSC and XRD showed that the transition from amorphous to crystalline state in the Mg-Ni-Y alloys has gone through several stages with origination of intermediate phase. IF spectra and Young's modulus of the alloys have been analyzed and the effect of yttrium content on the stability of intermediate phase was investigated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 644: Symposium L – Supercooled Liquid, Bulk Glassy and Nanocrystalline State of Alloys , 2000 , L11.3
Copyright
Copyright © Materials Research Society 2001

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