Strain-Rate Sensitivity of Nanocrystalline Cu–10Ta to 700,000/s
| Autor: | Kristopher A. Darling, Jonathan P. Ligda, B.C. Hornbuckle, Daniel Casem, Timothy Walter |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Logarithm Materials Science (miscellaneous) Analytical chemistry 02 engineering and technology Strain rate 01 natural sciences Nanocrystalline material 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Sample size determination 0103 physical sciences Range (statistics) Sensitivity (control systems) Order of magnitude Bar (unit) |
| Zdroj: | Journal of Dynamic Behavior of Materials. 6:24-33 |
| ISSN: | 2199-7454 2199-7446 |
| DOI: | 10.1007/s40870-019-00223-w |
| Popis: | Several miniature Kolsky bars are used to obtain stress–strain curves for nanocrystalline Cu–10Ta over a range of high strain-rates. The smallest bar (steel) has a 305 μm diameter, and achieved rates up to 700 × 103/s. Different sample sizes are needed to obtain different strain-rates, and it is shown that there is no appreciable sample size effect when different sizes are tested at similar strain-rates, even though the sample sizes vary by over an order of magnitude. No significant increase in strain-rate sensitivity is noted over the strain-rate range studied, i.e., the strength increases linearly with the logarithm of strain-rate from 0.001/s to 700 × 103/s. |
| Databáze: | OpenAIRE |
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