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

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. doi:10.1016/j.actamat.2008.02.049.

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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.

Item Type:Article
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Greer, Julia R.0000-0002-9675-1508
Additional Information:© 2008 Acta Materialia Inc. Received 6 December 2007; revised 28 January 2008; accepted 5 February 2008. Available online 21 April 2008. In print August 2008. This work was supported by the Korea Research Foundation Grant (KRF-2007-357-D00138) funded by the Korean Government (MOEHRD).
Funding AgencyGrant Number
Korea Research FoundationKRF-2007-357-D00138
Ministry of Education and Human Resources Development (Korea)UNSPECIFIED
Subject Keywords:Indentation size effect; Nanoindentation; Strain-hardening exponent; Plastic flow properties
Issue or Number:14
Record Number:CaltechAUTHORS:KIMam08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13316
Deposited On:10 Feb 2009 22:21
Last Modified:08 Nov 2021 22:36

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