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Rate dependence of shear banding and serrated flows in a bulk metallic glass

Published online by Cambridge University Press:  03 March 2011

W.H. Jiang ,
G.J. Fan ,
F.X. Liu ,
G.Y. Wang ,
H. Choo  and
P.K. Liaw
W.H. Jiang*
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
G.J. Fan
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
G.Y. Wang
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
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. e-mail: wjiang5@utk.edu
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Abstract

Using an infrared camera, we observed in situ dynamic shear-banding operations during compression of a bulk metallic glass at various strain rates. We demonstrated that the shear-banding events are highly dependent on strain rates, either intermittent at the lower strain rate or successive at the higher strain rate. Serrated plastic-flow behaviors are a result of shear-banding operations. These observations provide a new insight into inhomogeneous deformation of metallic glasses.

Keywords

AmorphousMetalStress/strain relationship
Type
Rapid Communications
Information
Journal of Materials Research , Volume 21 , Issue 9 , September 2006 , pp. 2164 - 2167
Copyright
Copyright © Materials Research Society 2006

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