About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
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Presentation Title |
Development of a New Method to Measure Surface Mechanical Properties Using In Situ SEM Microshear: Application at High Strain Rate |
Author(s) |
Gaylord Guillonneau, Guillaume Kermouche, Sergio Sao Joao |
On-Site Speaker (Planned) |
Gaylord Guillonneau |
Abstract Scope |
When two surfaces in contact are submitted to friction, a shearing is applied between them. Consequently, the measurement of shear properties of these surfaces is necessary. A new method to measure shear properties was developed and will be presented. This method consists in compressing a specific micropillar, whose geometry was modified using Focused Ion Beam in order to induce shear during compression. More especially, the geometry was inspired from a macroscopic test named “Shear Compression Specimen” [1]. This method was applied at low and high strain rate (until 2000s-1), on Fused silica, this material being usually used for calibrations at microscale. The results reveal a good repeatability of the tests, at each strain rate, and that deformation is mainly shear during the compression of the specimen, this phenomenon being validated using numerical simulation.
[1] Dorogoy et al., Experimental Mechanics, (2015) |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, Other |