Preparation of 2A14 Aluminium Alloy Large-Sized Hollow Ingots by Electromagnetic Stirring DC Casting
| Autor: | Bao Li, Zhi Hua Gao, Tian Yang Guan, Ming Wei Gao, Chun Sheng Chen, Xiao Peng Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Metallurgy 0211 other engineering and technologies 02 engineering and technology Condensed Matter Physics 01 natural sciences Electromagnetic stirring Mechanics of Materials Casting (metalworking) visual_art 0103 physical sciences Aluminium alloy visual_art.visual_art_medium General Materials Science 021102 mining & metallurgy |
| Zdroj: | Materials Science Forum. 993:267-272 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.993.267 |
| Popis: | The Φ730 / Φ340 mm hollow ingots of 2A14 aluminium alloy were produced by conventional and electromagnetic stirring (EMS) DC casting with extremely fine grain morphology. The results indicate that the metallographic microstructure of the alloy was more uniform and homogeneous in the EMS hollow ingot and the finer grain size was obtained. The average grain size dramatically decreased from 115 μm to 70 μm with applying EMS. The macrosegregation patterns of Cu element in EMS and conventional hollow ingots along the radial direction were both following the similar trend that positive segregation occurred in inner subsurface and middle section. Meanwhile negative segregation occurred in section offset to inside of centerline and outer surface. The extent of macrosegregation in EMS hollow ingot was severer than that in the conventional one. The mechanism of EMS was discussed to reveal its effect on the microstructure and macrosegregation. |
| Databáze: | OpenAIRE |
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