Is Ashby grain-boundary hardening model applicable for high strains?
| Autor: | S. Malopheyev, Igor Vysotskiy, Rustam Kaibyshev, S. Mironov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Alloy Metals and Alloys 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics 01 natural sciences Grain shape Transmission electron microscopy 0103 physical sciences Materials Chemistry engineering Hardening (metallurgy) Substructure Grain boundary Composite material 0210 nano-technology |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 29:2245-2251 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(19)65130-7 |
| Popis: | This work was undertaken to evaluate the applicability of the Ashby grain-boundary hardening model for a high strain range. To this end, Al–Mg alloy with distinctly different grain sizes (˜100 μm vs ˜1 μm) was cold-rolled to a true strain of ˜1.6 and the resulting dislocation densities were compared by using transmission electron microscopy. A minor difference revealed by the measurements suggested a violation of the Ashby's model. This effect was attributed to a partial relaxation of strain constraints due to significant change of grain shape, development of texture and formation of pronounced substructure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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