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Determination of the individual phase properties from the measured grid indentation data

Published online by Cambridge University Press:  19 October 2016

Petr Haušild Open the ORCID record for Petr Haušild [Opens in a new window] ,
Aleš Materna Open the ORCID record for Aleš Materna [Opens in a new window] ,
Lenka Kocmanová  and
Jiří Matějíček Open the ORCID record for Jiří Matějíček [Opens in a new window]
Petr Haušild*
Affiliation:
Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Czech Technical University in Prague, 120 00 Praha 2, Czech Republic
Aleš Materna
Affiliation:
Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Czech Technical University in Prague, 120 00 Praha 2, Czech Republic
Lenka Kocmanová
Affiliation:
Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Czech Technical University in Prague, 120 00 Praha 2, Czech Republic
Jiří Matějíček
Affiliation:
Institute of Plasma Physics, The Czech Academy of Sciences, 182 00 Praha, Czech Republic
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

Statistical distribution of grid indentation data measured in multiphase materials can be significantly affected by the presence of an interface between adjacent materials. The influence of an interface on the distribution of measured indentation moduli was therefore characterized in model metal–metal, ceramic–ceramic, and metal-ceramic composites. The change of properties near the interface was simulated by finite element method and experimentally verified by indentation in proximity of the boundary between two phases with distinctly different mechanical properties varying the depth of penetration and the distance from the interface. Subsequently, the conditional probability of measuring near the interface was quantified by beta distribution function with parameters dependent on the size of the volume/area affected by the presence of the interface. Using this approach, the intrinsic properties of the individual materials were successfully extracted from the experimental grid indentation data.

Keywords

nano-indentationhardnesscomposites
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 22 , 28 November 2016 , pp. 3538 - 3548
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Copyright
Copyright © Materials Research Society 2016 

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References

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