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Deformation and Failure of Zr57Ti5Cu20Ni8Al10 Bulk Metallic Glass Under Quasi-static and Dynamic Compression

Published online by Cambridge University Press:  31 January 2011

T. C. Hufnagel ,
T. Jiao ,
Y. Li ,
L-Q. Xing  and
K. T. Ramesh
T. C. Hufnagel
Affiliation:
Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218
T. Jiao
Affiliation:
Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218
Y. Li
Affiliation:
Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218
L-Q. Xing
Affiliation:
Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218
K. T. Ramesh
Affiliation:
Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218
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Abstract

We have examined the mechanical behavior of Zr57Ti5Cu20Ni8Al10 bulk metallic glass under uniaxial compression at strain rates from 10−4to 3 × 103 s−1. The failure stress decreases with increasing strain rate, and shear-band formation remains the dominant deformation mechanism. A consideration of basic properties of adiabatic shear bands makes it appear unlikely that shear bands formed under quasi-static loading are adiabatic; in the dynamic case, the time scales of deformation and thermal conduction are similar, indicating that a more sophisticated calculation is required. In the dynamic tests, however, high-speed cinematography reveals evidence that the mechanism of failure involves an adiabatic component.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 6 , June 2002 , pp. 1441 - 1445
Copyright
Copyright © Materials Research Society 2002

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