Improvement in Calibration Procedure in Nanoindentation: An Indenter Bluntness Indicator

Chicot, Didier; Montagne, A.; Mejias, A.; Roudet, F.; Coorevits, T.

Document type :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1007/s11340-024-01048-y

Title :

Improvement in Calibration Procedure in Nanoindentation: An Indenter Bluntness Indicator

Author(s) :

Chicot, Didier [Auteur]

Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]
Montagne, A. [Auteur]
Mejias, A. [Auteur]
Roudet, F. [Auteur]
Coorevits, T. [Auteur]

Journal title :

EXPERIMENTAL MECHANICS

Publisher :

Society for Experimental Mechanics

Publication date :

2024-03-01

ISSN :

0014-4851

HAL domain(s) :

Physique [physics]

English abstract : [en]

BackgroundNanoindentation experiments require the calibration of the tip area function, which involves up to 9 fitting coefficients following classical method. These coefficients are determined from indentation tests on a ...
Show more >BackgroundNanoindentation experiments require the calibration of the tip area function, which involves up to 9 fitting coefficients following classical method. These coefficients are determined from indentation tests on a reference material. However, their values may vary from one test batch to another. Consequently, these coefficients cannot describe the amplitude of the indenter tip defect. ObjectiveThe main objective of this study is to propose a contact area function that uses only one fitting coefficient to represent the indenter tip defect. This coefficient corresponds to the distance between the blunt and ideal indenter tip.MethodologyTo demonstrate the efficiency of the proposed contact area function, we reanalyzed nearly 40 calibration procedures, while keeping the same experimental protocol, performed between 2014 and today. A novel two-step calibration methodology is advanced. We compared the results of the proposed method to those obtained with the classic methodology. ResultsThis two-step methodology was applied to a fused silica calibration sample. The values of the Young's modulus and instrumented hardness are equals to 71 and 10 GPa, respectively. The length of the indenter tip defect increases gradually from 5 to 30 nm accordingly to the frequency of use of the indenter. The values of the mechanical properties calculated by this methodology are in good agreement with those obtained using the classical contact area function.ConclusionThe methodology presented in this paper demonstrates its ability to accurately calibrate the tip area function. This new calibration procedure considers both the Young’s modulus and the tip defect parameter as free parameters. Furthermore, the calibration parameters have a clear physical meaning and their values remain stables from one batch to another.Show less >

Language :

Anglais

Popular science :

Non

Collections :

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

Source :

Harvested from HAL

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