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 |
Application of Nanoindentation Strain Rate Jump Tests to Measure Strain Rate Sensitivity of Single Crystal Tungsten and Microcrystalline Cellulose |
Author(s) |
Kevin Schmalbach, Albert Lin, Daniel Bufford, Chenguang Wang, Changquan Calvin Sun, Nathan Mara |
On-Site Speaker (Planned) |
Kevin Schmalbach |
Abstract Scope |
Nanoindentation has become an important tool for the mechanical characterization of bulk materials and thin films, especially due to the relative ease of sample preparation. The strain rate sensitivity of materials can be assessed by analyzing the change in material hardness, as determined by the Oliver-Pharr method, during a change in the indentation strain rate. Presented here is a GUI-based tool for creating the indentation load function and standardized, openly-available method for analyzing the data. The methodologies are first demonstrated on single crystal tungsten for simplicity and to compare to literature, showing comparable results. They are further applied to a more complex system, microcrystalline cellulose. Despite the additional polycrystalline nature and the presence of voids and pores in the sample, the data analysis procedures provide consistent results and show promise for use in additional systems for facile measurement of strain rate sensitivity and activation volume. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, |