Simple phenomenological determination of contact stiffness and elastic modulus of Ce-based bulk metallic glasses through nanoindentation

W. H. Li; Keesam Shin; C. G. Lee; B. C. Wei; T. H. Zhang

doi:10.1063/1.2734394

Simple phenomenological determination of contact stiffness and elastic modulus of Ce-based bulk metallic glasses through nanoindentation

W. H. Li^*
, Keesam Shin
, C. G. Lee
, B. C. Wei
, T. H. Zhang

^*Corresponding author for this work

Anhui University of Technology
Changwon National University
CAS - Institute of Mechanics

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The viscoelastic deformation of Ce-based bulk metallic glasses (BMGs) with low glass transition temperature is investigated at room temperature. Contact stiffness and elastic modulus of Ce-based BMGs cannot be derived using the conventional Oliver-Pharr method [W. C. Oliver and G. M. Pharr, J. Mater. Res. 7, 1564 (1992)]. The present work shows that the time dependent displacement of unloading segments can be described well by a generalized Kelvin model. Thus, a modified Oliver-Pharr method is proposed to evaluate the contact stiffness and elastic modulus, which does, in fact, reproduce the values obtained via uniaxial compression tests.

Original language	English
Article number	171928
Journal	Applied Physics Letters
Volume	90
Issue number	17
DOIs	https://doi.org/10.1063/1.2734394
State	Published - 2007
Externally published	Yes

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title = "Simple phenomenological determination of contact stiffness and elastic modulus of Ce-based bulk metallic glasses through nanoindentation",

abstract = "The viscoelastic deformation of Ce-based bulk metallic glasses (BMGs) with low glass transition temperature is investigated at room temperature. Contact stiffness and elastic modulus of Ce-based BMGs cannot be derived using the conventional Oliver-Pharr method [W. C. Oliver and G. M. Pharr, J. Mater. Res. 7, 1564 (1992)]. The present work shows that the time dependent displacement of unloading segments can be described well by a generalized Kelvin model. Thus, a modified Oliver-Pharr method is proposed to evaluate the contact stiffness and elastic modulus, which does, in fact, reproduce the values obtained via uniaxial compression tests.",

author = "Li, \{W. H.\} and Keesam Shin and Lee, \{C. G.\} and Wei, \{B. C.\} and Zhang, \{T. H.\}",

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T1 - Simple phenomenological determination of contact stiffness and elastic modulus of Ce-based bulk metallic glasses through nanoindentation

AU - Li, W. H.

AU - Shin, Keesam

AU - Lee, C. G.

AU - Wei, B. C.

AU - Zhang, T. H.

PY - 2007

Y1 - 2007

N2 - The viscoelastic deformation of Ce-based bulk metallic glasses (BMGs) with low glass transition temperature is investigated at room temperature. Contact stiffness and elastic modulus of Ce-based BMGs cannot be derived using the conventional Oliver-Pharr method [W. C. Oliver and G. M. Pharr, J. Mater. Res. 7, 1564 (1992)]. The present work shows that the time dependent displacement of unloading segments can be described well by a generalized Kelvin model. Thus, a modified Oliver-Pharr method is proposed to evaluate the contact stiffness and elastic modulus, which does, in fact, reproduce the values obtained via uniaxial compression tests.

AB - The viscoelastic deformation of Ce-based bulk metallic glasses (BMGs) with low glass transition temperature is investigated at room temperature. Contact stiffness and elastic modulus of Ce-based BMGs cannot be derived using the conventional Oliver-Pharr method [W. C. Oliver and G. M. Pharr, J. Mater. Res. 7, 1564 (1992)]. The present work shows that the time dependent displacement of unloading segments can be described well by a generalized Kelvin model. Thus, a modified Oliver-Pharr method is proposed to evaluate the contact stiffness and elastic modulus, which does, in fact, reproduce the values obtained via uniaxial compression tests.

UR - https://www.scopus.com/pages/publications/34248531834

U2 - 10.1063/1.2734394

DO - 10.1063/1.2734394

M3 - 文章

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SN - 0003-6951

VL - 90

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 17

M1 - 171928

ER -

Simple phenomenological determination of contact stiffness and elastic modulus of Ce-based bulk metallic glasses through nanoindentation

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