About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
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| Presentation Title |
Bulk vs Indentation Strain Rate Sensitivity, A Correlative Study Across Length Scales |
| Author(s) |
Jacob Hempel, George Pharr, Daniel Lewis, Brady Butler, Braden Miller |
| On-Site Speaker (Planned) |
Jacob Hempel |
| Abstract Scope |
Nanoindentation offers several rapid and convenient ways to measure the strain rate sensitivity of rate-sensitive materials such as constant strain rate tests and strain rate jump tests. This makes the technique a viable high-throughput option for developing and screening materials for their strain rate sensitivity exponents. However, a better understanding of the connection between the strain rate sensitivity exponent obtained from indentation tests and that obtained from bulk-scale tests is required. Here, we present work that explores connections between the bulk and indentation strain rate sensitivity exponents obtained for two model materials, niobium (bcc) and copper (fcc), with the aim of bridging the gap between the small- and large-scale measurements. Measured strain rate sensitivity values obtained from bulk scale tensile and compression tests as well as tensile strain rate jump tests are presented and compared with analogous nanoindentation tests. Comparison of results from the different methodologies are discussed in detail. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, Nanotechnology |