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High Temperature Deformation in the Amorphous or Partially Crystallized Zr41.2Ti13.8Cu12.5Ni10Be22.5 Bulk Metallic Glass

Published online by Cambridge University Press:  11 February 2011

Q. Wang ,
J.J. Blandin ,
M. Suery  and
J.M. Pelletier
Q. Wang
Affiliation:
Génie Physique et Mécanique des Matériaux (GPM2), Institut National Polytechnique de Grenoble (INPG), UMR CNRS 5010, FR CNRS 2145, B.P. 46, 38042 Saint-Martin d'Hères, France GEMPPM, INSA Lyon, UMR CNRS 5510, FR CNRS 2145, Bat. B. Pascal, 69621 Villeurbanne, France
J.J. Blandin
Affiliation:
Génie Physique et Mécanique des Matériaux (GPM2), Institut National Polytechnique de Grenoble (INPG), UMR CNRS 5010, FR CNRS 2145, B.P. 46, 38042 Saint-Martin d'Hères, France
M. Suery
Affiliation:
Génie Physique et Mécanique des Matériaux (GPM2), Institut National Polytechnique de Grenoble (INPG), UMR CNRS 5010, FR CNRS 2145, B.P. 46, 38042 Saint-Martin d'Hères, France
J.M. Pelletier
Affiliation:
GEMPPM, INSA Lyon, UMR CNRS 5510, FR CNRS 2145, Bat. B. Pascal, 69621 Villeurbanne, France
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Abstract

The high temperature deformation of the Zr41.2Ti12.5Cu13.8Ni10Be22.5 bulk metallic glass (BMG) is studied in the supercooled liquid region. Both fully amorphous and partially crystallized states are investigated. In the studied experimental domain, the amorphous alloy exhibits a Newtonian behavior at high temperature and/or low strain rate whereas a transition to non-Newtonian behavior is observed when the temperature is decreased and/or the strain rate is increased. In the Newtonian domain, the dependency of the viscosity upon temperature can be described by an Arrhénius law. As far as the as-received alloy is maintained at high temperature for which phase separation and primary crystallisation is expected, the flow stress continuously increases, which is at least partly attributed to a change in the residual amorphous phase.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 754: Symposium CC – Supercooled Liquids, Glass Transition and Bulk Metallic Glasses , 2002 , CC9.4
Copyright
Copyright © Materials Research Society 2003

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References

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