Abstract
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.
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01 May 2005
An Erratum to this paper has been published: https://doi.org/10.1557/JMR.2005.0053e
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Alkorta, J., Martínez-Esnaola, J.M. & Gil, J.S. Absence of one-to-one correspondence between elastoplastic properties and sharp-indentation load–penetration data. Journal of Materials Research 20, 432–437 (2005). https://doi.org/10.1557/JMR.2005.0053
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DOI: https://doi.org/10.1557/JMR.2005.0053