Subgrain structure and internal stress fields in UFG materials: problem of Hall–Petch relation
| Autor: | N.A. Koneva, N.A. Popova, E.V. Kozlov, A.N. Zhdanov, E.E. Pekarskaya |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy chemistry.chemical_element Deformation (meteorology) Condensed Matter Physics Copper Grain size chemistry Deformation mechanism Mechanics of Materials Transmission electron microscopy General Materials Science Composite material Dislocation Grain boundary strengthening Grain Boundary Sliding |
| Zdroj: | Materials Science and Engineering: A. :789-794 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2003.12.081 |
| Popis: | Investigation of the grain and defect structures and mechanical properties of UFG copper with the average grain size 〈 d 〉 = 210 ± 120 nm is presented. The microstructural investigations were carried out on foils and replicas using TEM. The internal stresses were measured in grains with different sizes that contained different dislocation structures. It was established that grains with different sizes and defect structures make different contributions to deformation of the material. The parameters of grain boundary sliding were studied in detail. The deformation mechanisms were classified according to their contribution to overall deformation of the UFG copper. |
| Databáze: | OpenAIRE |
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