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Microstructural investigation of semisolid aluminum a356 alloy prepared by the combination of electromagnetic stirring and gas induction

Nafari, N ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.4028/www.scientific.net/SSP.285.290
  3. Publisher: Trans Tech Publications Ltd , 2019
  4. Abstract:
  5. A three phase electromagnetic stirrer was used to agitate aluminum A356 slurry and a dry and oxygen free argon gas was introduced in to the slurry by a porous graphite core at a same time. The prepared semi-solid slurry was then transferred into a metallic mold and was compacted by a drop weight. Results demonstrated a favorable increase in shape factor, decrease in aspect ratio and average diameter size at different intensities of stirring. The intensity of stirring was changed by altering the current passed through the magnetic coil and also bubbling intensity via the porous graphite diffuser. Different time intervals for electromagnetic stirring and gas induction were applied. Agitating the slurry for 90 Sec. separately by electromagnetic stirrer and GISS method, gave better results in terms of shape factor, decrease in average diameter of the globules and aspect ratio. © 2019 Trans Tech Publications, Switzerland
  6. Keywords:
  7. A356 Alloy ; Electromagnetic Stirring ; Gas Induced Semi-Solid (GISS) ; Globular Microstructure ; Semi-Solid Process ; Aspect ratio ; Electric motors ; Graphite ; A356 alloys ; Globular microstructures ; Semi-solids ; Aluminum alloys
  8. Source: 15th International conference on Semi-Solid Processing of Alloys and Composites, S2P 2018, 22 October 2018 through 24 October 2018 ; Volume 285 SSP , 2019 , Pages 290-295 ; 16629779 (ISSN); 9783035713732 (ISBN)
  9. URL: https://www.scientific.net/SSP.285.290