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FLUCTUATION OF INTERNAL FRICTION IN METALLIC GLASSES

Published online by Cambridge University Press:  02 March 2011

Y. Miyauchi ,
R. Tamura  and
Y. Hiki
Y. Miyauchi
Affiliation:
Department of Materials Science and Technology, Science University of Tokyo Noda, Chiba 278-8510, Japan
R. Tamura
Affiliation:
Department of Materials Science and Technology, Science University of Tokyo Noda, Chiba 278-8510, Japan
Y. Hiki
Affiliation:
Department of Physics, Tokyo Institute of Technology, Emeritus 39-3-303 Motoyoyogi, Shibuya-ku, Tokyo 151-0062, Japan
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Abstract

Internal friction (IF) of a metallic glass Zr55Cu30Al10Ni5 has been measured near the glass transition temperature T g (= 666 K). The measurement is performed by using DMA (TA Instrument) apparatus at a frequency of 0.01 Hz for a specimen stabilized by annealing. The specimen is kept at a constant temperature T, and the IF value Q -1 is measured as a function of time t. A fluctuation of Q -1 with time is seen, and the magnitude of the fluctuation, F(t), is derived from the Q -1-vs-t data. F(t) is Fourier transformed to the frequency spectrum F(f). Such experiment and analyses are carried out at various temperatures near T g. A characteristic peak (f ~ 10-3 Hz) is found in the spectrum F(f) in the glass transition region.

Keywords

viscoelasticityamorphousalloy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1300: Symposium U – Bulk Metallic Glasses and their Applications , 2011 , mrsf10-1300-u09-41
Copyright
Copyright © Materials Research Society 2011

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