Numerical Simulation and Experimental Verification of Microstructure Evolution during the Seamless Tube Extrusion of Semi-Continuous Casting AZ31 Magnesium Alloy
| Autor: | Tao Lin, Di Zhang, Ji Xue Zhou, Yun Teng Liu, Bai Chang Ma, Yuansheng Yang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Metallurgy Alloy 02 engineering and technology engineering.material Strain rate 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Continuous casting Mechanics of Materials 0103 physical sciences Volume fraction Dynamic recrystallization engineering General Materials Science Extrusion Magnesium alloy 0210 nano-technology |
| Zdroj: | Materials Science Forum. 898:79-85 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.898.79 |
| Popis: | Based on the stress-strain curves at the temperature of 300-450 °C with strain rate of 0.01-1 s−1 by hot compression tests, the empirical dynamic recrystallization models for the semi-continuous AZ31magnesium alloy were developed. The dynamic recrystallization evolution during the seamless tube extrusion of the AZ31 Mg alloy was simulated by numerical method with the derived models and validated by experiment measurements. The results show that at certain extrusion speed the influence of the extruding temperature on the dynamic recrystallization fraction was significant. With the increase of the extruding temperature the volume fraction of dynamic recrystallization increase obviously. The predicted dynamic recrystallization fraction was in an excellent agreement with the experimental results. |
| Databáze: | OpenAIRE |
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