Structure evolution and mechanical properties of beryllium foils subjected to cold rolling and high-vacuum annealing
| Autor: | O.N. Stolyarov, I.A. Shishov, I.A. Kasatkin, P.A. Glukhov, V.V. Mishin |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Annealing (metallurgy) Mechanical Engineering Ultra-high vacuum chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences chemistry Mechanics of Materials 0103 physical sciences Ultimate tensile strength General Materials Science Beryllium Composite material Elongation 0210 nano-technology Anisotropy Electron backscatter diffraction |
| Zdroj: | Materials Science and Engineering: A. 750:60-69 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2019.02.031 |
| Popis: | The effects of microstructure and texture evolution on the mechanical properties of beryllium foils subjected to hot multi-pass cross-rolling and cold rolling with high-vacuum annealing were examined in this work. Electron backscatter diffraction (EBSD) technique was used to characterize the changes in the beryllium microstructure and texture. Yield strength, ultimate tensile strength and elongation to failure were determined in tensile tests. The results show that microstructure and texture significantly affect the mechanical properties of the beryllium foils. The foils after hot multi-pass cross-rolling have a split basal {0001} ± 30° transverse direction texture, which leads to a strong anisotropy of their mechanical properties, low strength and ductility in transverse direction. Cold rolling with high-vacuum annealing significantly enhances the mechanical properties of foils. It is due to a more homogeneous microstructure and reduced anisotropy owing to a strong basal fiber texture. Enhanced ductility of beryllium foils can be achieved by using regimes with high strains before final annealing. |
| Databáze: | OpenAIRE |
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