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Superplastic Deformation and Viscous Flow in an Zr-Based Metallic Glass at 410°C

Published online by Cambridge University Press:  10 February 2011

T. G. Nieh ,
J. G. Wang ,
J. Wadsworth ,
T. Mukai  and
C. T. Liu
T. G. Nieh
Affiliation:
Lawrence Livermore National Laboratory, Box 808, Livermore CA 94551, niehl@llnl.gov
J. G. Wang
Affiliation:
Lawrence Livermore National Laboratory, Box 808, Livermore CA 94551, niehl@llnl.gov
J. Wadsworth
Affiliation:
Lawrence Livermore National Laboratory, Box 808, Livermore CA 94551, niehl@llnl.gov
T. Mukai
Affiliation:
Osaka Municipal Technical Research Institute, Osaka 536, Japan
C. T. Liu
Affiliation:
Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge TN 37831
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Abstract

The thermal properties of an amorphous alloy (composition in at.%: Zr-10Al-5Ti-17.9Cu-14.6Ni), and particularly the glass transition and crystallization temperature as a function of heating rate, were characterized using Differential Scanning Calorimetry (DSC). X-ray diffraction analyses and Transmission Electron Microscopy were also conducted on samples heat-treated at different temperatures for comparison with the DSC results. Superplasticity in the alloy was studied at 410°C, a temperature within the supercooled liquid region. Both single strain rate and strain rate cycling tests in tension were carried out to investigate the deformation behavior of the alloy in the supercooled liquid region. The experimental results indicated that the alloy did not behave like a Newtonian fluid.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 554: Symposium MM – Bulk Metallic Glasses , 1998 , 379
Copyright
Copyright © Materials Research Society 1999

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