Kim, Ju-Young and Kang, Seung-Kyun and Greer, Julia R. and Kwon, Dongil (2008) Evaluating plastic flow properties by characterizing indentation size effect using a sharp indenter. Acta Materialia, 56 (14). pp. 3338-3343. ISSN 1359-6454 http://resolver.caltech.edu/CaltechAUTHORS:KIMam08
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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.
|Additional Information:||© 2008 Elsevier. Received 6 December 2007; received in revised form 28 January 2008; accepted 5 February 2008; available online 21 April 2008. This work was supported by the Korea Research Foundation Grant (KRF-2007-357-D00138) funded by the Korean Government (MOEHRD).|
|Subject Keywords:||Indentation size effect; Nanoindentation; Strain-hardening exponent; Plastic flow properties|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||23 Apr 2009 18:30|
|Last Modified:||26 Dec 2012 10:51|
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