Tensile strength, deformation microstructure and texture evolution of Al-Mg-(Si) alloy sheets by through-width vibration rolling process.
| Autor: | Yue-Ting Chen, 陳岳廷 |
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| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 Lightweight materials must be high strength and lightweight. In the present study, new severe plastic deformation (SPD) technique, through-width vibration rolling (TWVR), was investigated for continuously producing high-strength aluminum sheet. The TWVR process heavily deformed the metal between rollers by plastically compression and shear deformation. AA5052 Al-Mg and AA6061 Al-Mg-Si alloys were selected as the test samples. The yield strength of the as-processed 5052 alloy by TWVR (5 Hz-1 mm) was 369 MPa that large 181 MPa than the commercial 5052 alloy. During annealing temperature 150 °C and 200 °C process, the as-TWVR AA5052 sheets had respectively average yield strength 324 MPa and 302 MPa. The elongation of as-TWVR 5052 samples was 8% when annealing temperature at 200 °C. The microstructure of as-TWVR 5052 samples had UFG structure at 150 °C and 200 °C annealing treatment. The typical rolling textures in 5052 samples develop to a strong Cube texture at 150 °C annealing. As-TWVR 6061-T4 sheet had maximum yield strength 450 MPa, corresponding to 5 Hz-1.5 mm. The yield strength of the as-TWVR samples large 181 MPa than commercial 6061-T6 alloy sheets. The as-TWVR sample was then directly subjected to |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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