Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1448517 | Acta Materialia | 2008 | 6 Pages |
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Ju-Young Kim, Seung-Kyun Kang, Julia R. Greer, Dongil Kwon,