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Characterization of homogenous and plastically graded materials with spherical indentation and inverse analysis

Published online by Cambridge University Press:  23 September 2011

Charbel Moussa ,
Olivier Bartier ,
Gérard Mauvoisin ,
Philippe Pilvin  and
Guillaume Delattre
Charbel Moussa*
Affiliation:
LaRMAUR—Indentation, Campus de Beaulieu, 35042 Rennes, France; and FAURECIA Automotive seating, Le pont de vère, 61100 Caligny, France
Olivier Bartier
Affiliation:
LaRMAUR—Indentation, Campus de Beaulieu, 35042 Rennes, France
Gérard Mauvoisin
Affiliation:
LaRMAUR—Indentation, Campus de Beaulieu, 35042 Rennes, France
Philippe Pilvin
Affiliation:
Laboratoire d’Ingénierie des Matériaux de Bretagne, Université de Bretagne-Sud, BP 92116-56321 Lorient Cedex, France
Guillaume Delattre
Affiliation:
FAURECIA Automotive seating, Le pont de vère, 61100 Caligny, France
*
a)Address all correspondence to this author. e-mail: charbel.moussa@univ-rennes1.fr
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Abstract

This study investigates spherical indentation of plastically graded materials (PGMs). The hardness of these materials decreases with depth due to microstructural or compositional changes. To predict the behavior of PGM, the knowledge of the plastic properties of the surface and the substrate is necessary. In this work, the spherical indentation technique is applied on carbonitrided steels to obtain their mechanical properties. First, spherical indentation was applied to characterize homogenous materials using inverse analysis. The comparison with tensile test’s results shows that the inverse analysis using spherical indentation data is a reliable method to determine the plastic properties of homogeneous materials. In the second part spherical indentation was used to characterize carbonitrided steels using inverse analysis to obtain plastic properties of the surface. The results show that spherical indentation using inverse analysis has a real potential for evaluating mechanical properties of PGM.

Keywords

SimulationStress/strain relationshipHardness
Type
Reviews
Information
Journal of Materials Research , Volume 27 , Issue 1: Focus Issue: Instrumented Indentation , 14 January 2012 , pp. 20 - 27
Copyright
Copyright © Materials Research Society 2011

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