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Influence of sample thickness and experimental device configuration on the spherical indentation of AISI 1095 steel

Published online by Cambridge University Press:  17 October 2011

Philippe Brammer ,
Gérard Mauvoisin ,
Olivier Bartier ,
Xavier Hernot  and
Simon-Serge Sablin
Philippe Brammer*
Affiliation:
L.A.R.M.A.U.R-Indentation, E.A. 42.82, Université de Rennes 1, Campus de Beaulieu, 35402 Rennes Cedex, France; and Technocentre Renault, Research Advanced Studies and Materials Engineering (DREAM) – Material Engineering Department (DIMat), 78288 Guyancourt Cedex, France
Gérard Mauvoisin
Affiliation:
L.A.R.M.A.U.R-Indentation, E.A. 42.82, Université de Rennes 1, Campus de Beaulieu, 35402 Rennes Cedex, France
Olivier Bartier
Affiliation:
L.A.R.M.A.U.R-Indentation, E.A. 42.82, Université de Rennes 1, Campus de Beaulieu, 35402 Rennes Cedex, France
Xavier Hernot
Affiliation:
L.A.R.M.A.U.R-Indentation, E.A. 42.82, Université de Rennes 1, Campus de Beaulieu, 35402 Rennes Cedex, France
Simon-Serge Sablin
Affiliation:
Technocentre Renault, Research Advanced Studies and Materials Engineering (DREAM) – Material Engineering Department (DIMat), 78288 Guyancourt Cedex, France
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Most instrumented indentation theoretical studies and models consider bulk sample geometry, which implies no influence on the indentation response. In the particular case of thin samples, our previous studies have shown that the thickness has an influence on the experimental device behavior as well as on the sample and material response. This work is a numerical and experimental illustration of this particularity. Spherical macroindentation tests are performed on AISI 1095 steel samples of thicknesses varying from 0.55 to 10 mm. Experimental and numerical results are compared. Experimental limitations are investigated, and solutions to obtain results that are independent of the sample thickness and curvature are proposed. We show that the proposed solution leads to a reliable identification of the material mechanical properties of thin and moderately bent samples.

Keywords

Stress/strain relationshipMetalSimulation
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 1: Focus Issue: Instrumented Indentation , 14 January 2012 , pp. 76 - 84
Copyright
Copyright © Materials Research Society 2011

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References

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