Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Deformation Mechanisms of the Zr40Ti14Ni10Cu12Be24 Bulk Metallic Glass
Wendelin J. WrightRanjana SahaWilliam D. Nix
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2001 Volume 42 Issue 4 Pages 642-649


We have studied the mechanical behavior of Zr40Ti14Ni10Cu12Be24 through uniaxial compression and nanoindentation experiments. Quantitative measurements of the serrated plastic flow observed during uniaxial compression are reported. These data are used to predict temperature increases in single shear bands due to local adiabatic heating caused by the work done on the sample as shear propagates progressively across the sample. Since the predicted temperature increases are insufficient to reach the glass transition temperature, it is unlikely that localized heating is the primary cause of flow localization. Instead, localization of shear is more likely caused by changes in viscosity associated with increased free volume in the shear bands. The orientation of the shear bands in compression tests and an indentation size effect for the onset of plastic flow in nanoindentation both point to increased free volume as the cause of localization.

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© 2001 The Japan Institute of Metals and Materials
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