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Kim, Ju-Young
Robust Multifunctional Materials Lab
Research Interests
  • Flexible / stretchable devices, nano-mechanics, nanoporous metal, materials reliability

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Evaluating plastic flow properties by characterizing indentation size effect using a sharp indenter

Cited 20 times inthomson ciCited 21 times inthomson ci
Title
Evaluating plastic flow properties by characterizing indentation size effect using a sharp indenter
Author
Kim, Ju-YoungKang, Seung-KyunGreer, Julia R.Kwon, Dongil
Keywords
Indentation size effect; Nanoindentation; Plastic flow properties; Strain-hardening exponent
Issue Date
2008-08
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ACTA MATERIALIA, v.56, no.14, pp.3338 - 3343
Abstract
The strain-hardening exponent, used in describing the plastic flow properties of materials, is evaluated from the characteristic length in the indentation size effect (ISE). A linear relationship is found between the strain-hardening exponent and the log of the ISE characteristic length for Ni and SCM21 (structural steel) samples with different plastic pre-strain values. These results are explained through the Taylor dislocation hardening model and a representative stress-strain approach. A dimensionless function characterizing the plastic deformation using only parameters generally measurable by nanoindentation testing is also proposed. The feasibility of developing a unique dimensionless function is studied for 22 metals.
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DOI
10.1016/j.actamat.2008.02.049
ISSN
1359-6454
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MSE_Journal Papers
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