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Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid
Published on: December 2, 2022
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Controlling strain localization in thin films with nanoindenter tip sharpness
1Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700, Leoben, Austria. stanislav.zak@oeaw.ac.at.
Scientific Reports
|October 27, 2024
Summary
The tip radius significantly impacts thin film mechanical property measurements. Understanding this parameter is crucial for accurate elastic modulus determination in nanoindentation experiments.
Area of Science:
- Materials Science
- Mechanical Engineering
- Nanotechnology
Background:
- Thin film mechanical property measurement is vital for diverse applications.
- Substrate influence complicates accurate elastic modulus determination.
- Existing methods lack comprehensive analysis of influencing parameters.
Purpose of the Study:
- To quantify the effect of tip radius on strain fields during nanoindentation.
- To investigate parameters enhancing thin film mechanical property measurement accuracy.
- To highlight the importance of tip radius in nanoindentation analysis.
Main Methods:
- Utilized three Berkovich indentation tips with varying radii.
- Performed thin multilayer nanoindentation experiments.
- Employed numerical modeling for simulation and analysis.
Main Results:
- Confirmed a large elastically deformed zone with strain localization under the indenter.
- Demonstrated a direct correlation between tip radius and strain localization.
- Showcased how tip radius influences experimental outcomes.
Conclusions:
- Tip radius is a critical parameter influencing strain localization in nanoindentation.
- Accurate knowledge of tip radius is essential for reliable thin film elastic modulus measurement.
- This study emphasizes the need to consider tip radius for improved nanoindentation insights.
