Properties of Rolled AZ31 Magnesium Alloy Sheet Fabricated by Continuous Variable Cross-Section Direct Extrusion
| Autor: | Xue Wen Li, Yang Liu, Wen Yong Shi, Feng Li |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Mechanical Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences law.invention Optical microscope Mechanics of Materials law 0103 physical sciences Ultimate tensile strength Dynamic recrystallization General Materials Science Extrusion Composite material Magnesium alloy 0210 nano-technology Electron backscatter diffraction |
| Zdroj: | Journal of Materials Engineering and Performance. 27:1334-1342 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-018-3233-x |
| Popis: | Rolling is currently a widely used method for manufacturing and processing high-performance magnesium alloy sheets and has received widespread attention in recent years. Here, we combined continuous variable cross-section direct extrusion (CVCDE) and rolling processes. The microstructure and mechanical properties of the resulting sheets rolled at different temperatures from CVCDE extrudate were investigated by optical microscopy, scanning electron microscope, transmission electron microscopy and electron backscatter diffraction. The results showed that a fine-grained microstructure was present with an average grain size of 3.62 μm in sheets rolled from CVCDE extrudate at 623 K. Dynamic recrystallization and a large strain were induced by the multi-pass rolling, which resulted in grain refinement. In the 573-673 K range, the yield strength, tensile strength and elongation initially increased and then declined as the CVCDE temperature increased. The above results provide an important scientific basis of processing, manufacturing and the active control on microstructure and property for high-performance magnesium alloy sheet. |
| Databáze: | OpenAIRE |
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