Titre :

A contact area function for Berkovich nanoindentation : Application to hardness determination of a TiHfCN thin film

Auteur(s) :

Chicot, Didier [Auteur]
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Yetna N'Jock, M. [Auteur]
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Puchi-Cabrera, Eli Saúl [Auteur]
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Iost, Alain [Auteur]
Mechanics surfaces and materials processing [MSMP]
Staia, M.H. [Auteur]
Universidad Central de Venezuela [UCV]
Louis, G. [Auteur]
Laboratoire Génie Civil et Géo-Environnement [Béthune] [LGCgE]
Bouscarrat, G. [Auteur]
Centre d'Ingénierie en Traitements et Revêtements de Surface Avancés [CITRA]
Aumaitre, R. [Auteur]
Centre d'Ingénierie en Traitements et Revêtements de Surface Avancés [CITRA]

Titre de la revue :

Thin Solid Films

Pagination :

259-266

Éditeur :

Elsevier

Date de publication :

2014-02

ISSN :

0040-6090

Mot(s)-clé(s) en anglais :

Nanoindentation
Contact area
Elastic modulus
Hardness
Thin film

Discipline(s) HAL :

Sciences de l'ingénieur [physics]/Matériaux

Résumé en anglais : [en]

In nanoindentation, especially at very low indenter displacements, the indenter/material contact area must be defined in the best possible way in order to accurately determine the mechanical properties of the material. One ...
Lire la suite >In nanoindentation, especially at very low indenter displacements, the indenter/material contact area must be defined in the best possible way in order to accurately determine the mechanical properties of the material. One of the best methodologies for the computation of the contact area has been proposed by Oliver and Pharr [W.C.Oliver, G.M.Pharr, J.Mater. Res. 7 (1992) 1564], which involves a complex phenomenological area function. Unfortunately, this formulation is only valid when the continuous stiffness measurement mode is employed. For other conditions of indentation, different contact area functions, which take into account the effective truncation length or the radius of the rounded indentertip, as well as some fitting parameters, have been proposed. However, most of these functions require a calibration procedure due to the presence of such parameters. To avoid such a calibration, in the present communication a contact area function only related to the truncation length representative of the indenter tip defect, which can be previously estimated with high resolution microscopy, has been proposed. This model allows the determination of consistent indentation data from indenter displacements of only few nanometers indepth. When this proposed contact area function is applied to the mechanical characterization of a TiHfCN film of 2.6 μm in thickness deposited onto a tool steel substrate, the direct determination of the hardness and elastic modulus of the film leads to values of 35.5±2 GPa and 490±50 GPa, respectively.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Laboratoire Génie Civil et géo-Environnement (LGCgE) - ULR 4515

Source :

Harvested from HAL

Date de dépôt :

2025-02-26T13:28:19Z