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Strain rate dependence of plastic flow in Ce-based bulk metallic glass during nanoindentation

Published online by Cambridge University Press:  03 March 2011

B.C. Wei ,
L.C. Zhang ,
T.H. Zhang ,
D.M. Xing ,
J. Das  and
J. Eckert
B.C. Wei*
Affiliation:
National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
L.C. Zhang
Affiliation:
National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
T.H. Zhang
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
D.M. Xing
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
J. Das
Affiliation:
FG Physikalische Metallkunde, FB 11 Material- und Geowissenschaften, Technische Universität Darmstadt, D-64287 Darmstadt, Germany; and Leibniz-Institut für Festkörperund Werkstoffforschung Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany
J. Eckert
Affiliation:
FG Physikalische Metallkunde, FB 11 Material- und Geowissenschaften, Technische Universität Darmstadt, D-64287 Darmstadt, Germany; and Leibniz-Institut für Festkörperund Werkstoffforschung Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The strain rate dependence of plastic deformation of Ce60Al15Cu10Ni15 bulk metallic glass was studied by nanoindentation. Even though the ratio of room temperature to the glass transition temperature was very high (0.72) for this alloy, the plastic deformation was dominated by shear banding under nanoindentation. The alloy exhibited a critical loading rate dependent serrated flow feature. That is, with increasing loading rate, the alloy exhibited a transition from less prominent serrated flow to pronounced serrated flow during continuous loading but from serrated to smoother flow during stepped loading.

Keywords

AlloyAmorphousStress/strain relationship
Type
Reviews
Information
Journal of Materials Research , Volume 22 , Issue 2 , September 2006 , pp. 258 - 263
Copyright
Copyright © Materials Research Society 2007

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References

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