Grain refinement of AZ31 magnesium alloy by electromagnetic stirring under effect of grain-refiner

The effects of electromagnetic stirring and Al 4 C 3 grain refiner on the grain refinement of semi-continuously cast AZ31 magnesium alloy were discussed in this investigation. The results indicate that electromagnetic stirring has an effective refining effect on the grain size of AZ31 magnesium allo...

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Bibliographic Details
Published in:Bulletin of materials science 2012-09, Vol.35 (4), p.651-655
Main Authors: GAO, S Y, LE, Q C, ZHANG, Z Q, CUI, J Z
Format: Article
Language:English
Subjects:
Aluminum carbides
Chemistry and Materials Science
Deactivation
Electromagnetic stirring
Engineering
Grain refinement
Grain size
Magnesium base alloys
Materials Science
Nucleation
Poisons
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Summary:The effects of electromagnetic stirring and Al 4 C 3 grain refiner on the grain refinement of semi-continuously cast AZ31 magnesium alloy were discussed in this investigation. The results indicate that electromagnetic stirring has an effective refining effect on the grain size of AZ31 magnesium alloy under the effect of Al 4 C 3 grain refiner. Electromagnetic stirring can ‘activate’ the Al 4 C 3 particles, resulting in more heterogeneous nucleation sites for the primary α -Mg grains. But, longer holding time can ‘deactivate’ the Al 4 C 3 particles and poison the grain refining effect.
ISSN:0250-4707
0973-7669
DOI:10.1007/s12034-012-0345-z