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...

Full description

Saved in:
Bibliographic Details
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
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0884-2914
2044-5326
DOI:10.1557/JMR.2005.0053