The characterization of creep and time-dependent properties of bulk metallic glasses using nanoindentation

Viscoelastic deformation and creep behavior of La- and Ce-based bulk metallic glasses (BMGs) with low glass transition temperature are investigated through nanoindentation at room temperature. Creep compliance and retardation spectra are derived to study the creep mechanism. The time-dependent displ...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2008-04, Vol.478 (1), p.371-375
Main Authors: Li, W.H., Shin, Keesam, Lee, C.G., Wei, B.C., Zhang, T.H., He, Y.Z.
Format: Article
Language:English
Subjects:
A generalized Kelvin model
Applied sciences
Bulk metallic glasses
Creep
Elasticity. Plasticity
Exact sciences and technology
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Nanoindentation
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Summary:Viscoelastic deformation and creep behavior of La- and Ce-based bulk metallic glasses (BMGs) with low glass transition temperature are investigated through nanoindentation at room temperature. Creep compliance and retardation spectra are derived to study the creep mechanism. The time-dependent displacement can be well described by a generalized Kelvin model. A modification is proposed to determine the elastic modulus from the generalized Kelvin model. The results are in excellent agreement with the elastic modulus determined by uniaxial compression tests.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2007.06.015