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Strain-rate dependence of hardening and softening in compression of a bulk-metallic glass

Published online by Cambridge University Press:  31 January 2011

W.H. Jiang ,
F.X. Liu ,
F. Jiang ,
K.Q. Qiu ,
H. Choo  and
P.K. Liaw
W.H. Jiang*
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
F.X. Liu
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
F. Jiang
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
K.Q. Qiu
Affiliation:
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, Liaoning 110023, People’s Republic of China
H. Choo
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996; and Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
P.K. Liaw
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
*
a)Address all correspondence to this author. email: wjiang5@utk.edu
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Abstract

We investigated the effect of strain rate on the plastic-flow stress of a Zr-based bulk-metallic glass in quasistatic compression. The results indicate that the plastic-flow stress is dependent on the strain rate: an increase in the strain rate leads to a decrease in the plastic-flow stress, and vice versa. However, simply loading, unloading, and reloading at a constant strain rate do not change the plastic-flow stress. This strain-rate dependence of the plastic-flow stress may be related to shear-banding operations.

Keywords

AmorphousStress/strain relationship
Type
Rapid Communications
Information
Journal of Materials Research , Volume 22 , Issue 10 , October 2007 , pp. 2655 - 2658
Copyright
Copyright © Materials Research Society 2007

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References

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