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Synthesis of Cu47Ti34Zr11Ni8 Bulk Metallic Glass by Warm Extrusion of Gas Atomized Powders

Published online by Cambridge University Press:  31 January 2011

D.J. Sordelet ,
E. Rozhkova ,
P. Huang ,
P.B. Wheelock ,
M.F. Besser ,
M.J. Kramer ,
M. Calvo-Dahlborg  and
U. Dahlborg
D.J. Sordelet
Affiliation:
Ames Laboratory, Department of Materials Science and Engineering, and Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50014
E. Rozhkova
Affiliation:
Ames Laboratory, Iowa State University, Ames, Iowa 50014
P. Huang
Affiliation:
Ames Laboratory, Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50014
P.B. Wheelock
Affiliation:
Ames Laboratory, Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50014
M.F. Besser
Affiliation:
Ames Laboratory, Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50014
M.J. Kramer
Affiliation:
Ames Laboratory, Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50014
M. Calvo-Dahlborg
Affiliation:
LSG2M-UMRT7584, Ecole des Mines, 54042 Nancy Cedex, France
U. Dahlborg
Affiliation:
LSG2M-UMRT7584, Ecole des Mines, 54042 Nancy Cedex, France
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Abstract

Cu47Ti34Zr11Ni8 amorphous gas atomized powders were consolidated by warm extrusion. After consolidation near 723 K using an extrusion ratio of 5, the material retains between 88% and 98% of the amorphous structure found in the gas atomized powder. The onsets of the glass transition and crystallization temperatures of this extruded material are observed respectively at slightly higher and lower temperatures than those of the starting powders. These temperature shifts are attributed to a composition change in the remaining amorphous phase during partial devitrification throughout the extrusion process. Powders extruded at the same temperature, but using higher extrusion ratios of 9 and 13, exhibit substantial devitrification during the consolidation process yet still deform homogeneously.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 1 , January 2002 , pp. 186 - 198
Copyright
Copyright © Materials Research Society 2002

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