Absence of one-to-one correspondence between elastoplastic properties and sharp-indentation load–penetration data

The connection between parameters that can be measured by means of instrumented indentation with the real mechanical properties has been a matter of discussion for several years. In fact, even hardness is not a readily measurable magnitude since the real contact area depends on both the elastic and...

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Published in:Journal of materials research 2005-02, Vol.20 (2), p.432-437
Main Authors: Alkorta, J., Martínez-Esnaola, J.M., Sevillano, J. Gil
Format: Article
Language:English
Subjects:
Elastic properties
Indentation
Mechanical properties
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description The connection between parameters that can be measured by means of instrumented indentation with the real mechanical properties has been a matter of discussion for several years. In fact, even hardness is not a readily measurable magnitude since the real contact area depends on both the elastic and plastic properties of the sample. Recently, Dao et al. [ Acta Mater49, 3899 (2001)] proposed a method based on numerical fittings to calculate by a forward-reverse algorithm the elastoplastic properties of a sample from the load-penetration curve obtained with a sharp indenter. This work will show, in contrast, that it is not possible to measure uniquely these mechanical properties of a sample in that way.
doi_str_mv 10.1557/JMR.2005.0053
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subjects Elastic properties
Indentation
Mechanical properties
title Absence of one-to-one correspondence between elastoplastic properties and sharp-indentation load–penetration data
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