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Article Dans Une Revue Metals Année : 2019

Understanding the Interdependence of Penetration Depth and Deformation on Nanoindentation of Nanoporous Silver

Résumé

A silver-based nanoporous material was produced by dealloying (selective chemical etching) of an Ag 38.75 Cu 38.75 Si 22.5 crystalline alloy. Composed of connected ligaments, this material was imaged using a scanning electron microscope (SEM) and focused ion-beam (FIB) scanning electron microscope tomography. Its mechanical behavior was evaluated using nanoindentation and found to be heterogeneous, with density variation over a length scale of a few tens of nanometers, similar to the indent size. This technique proved relevant to the investigation of a material's mechanical strength, as well as to how its behavior related to the material's microstructure. The hardness is recorded as a function of the indent depth and a phenomenological description based on strain gradient and densification kinetic was proposed to describe the resultant depth dependence.

Domaines

Matériaux
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Dates et versions

hal-02438774 , version 1 (14-01-2020)

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Yannick Champion, Mathilde Laurent-Brocq, Pierre Lhuissier, Frédéric Charlot, Alberto Moreira Jorge Junior, et al.. Understanding the Interdependence of Penetration Depth and Deformation on Nanoindentation of Nanoporous Silver. Metals, 2019, ⟨10.3390/met9121346⟩. ⟨hal-02438774⟩
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