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Pressure-dependent flow behavior of Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass

Published online by Cambridge University Press:  31 January 2011

Jun Lu  and
Guruswami Ravichandran
Jun Lu
Affiliation:
Graduate Aeronautical Laboratories, California Institute of Technology, Pasadena, California 91125
Guruswami Ravichandran*
Affiliation:
Graduate Aeronautical Laboratories, California Institute of Technology, Pasadena, California 91125
*
a) Address all correspondence to this author. e-mail: ravi@caltech.edu
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Abstract

An experimental study of the inelastic deformation of bulk metallic glass Zr41.2Ti13.8Cu12.5Ni10Be22.5 under multiaxial compression using a confining sleeve technique is presented. In contrast to the catastrophic shear failure (brittle) in uniaxial compression, the metallic glass exhibited large inelastic deformation of more than 10% under confinement, demonstrating the nature of ductile deformation under constrained conditions in spite of the long-range disordered characteristic of the material. It was found that the metallic glass followed a pressure (p) dependent Tresca criterion τ = τ0 + βp, and the coefficient of the pressure dependence β was 0.17. Multiple parallel shear bands oriented at 45° to the loading direction were observed on the surfaces of the deformed specimens and were responsible for the overall inelastic deformation.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 9 , September 2003 , pp. 2039 - 2049
Copyright
Copyright © Materials Research Society 2003

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