Refinement Effect and Mechanism of AZ31 Magnesium Alloy by Electromagnetic Stirring under the Effect of Grain-Refiner

Abstract:

The effects of electromagnetic stirring and Al₄C₃ 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 effective refining effect on the grain size of AZ31 magnesium alloy under the effect of Al₄C₃ grain refiner. Electromagnetic stirring can “activate” the Al₄C₃ particles, resulting in more heterogeneous nucleation sites for the primary α-Mg grains. But, longer holding time can “inactivate” the Al₄C₃ particles, and the optimal experimental holding time is 60 min in the present investigation. The activated rate of the electromagnetic under the experimental condition ρ2=1.65%.

• Periodical: Advanced Materials Research (Volumes 631-632)
• Pages: 556-561
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.631-632.556
• Online since: January 2013
• Authors: Sheng Yuan Gao, Shi Lian Qu, Yue Yuan, Bao Qin Fu
• Keywords: Al₄C₃, AZ31 Magnesium Alloy, Grain Refinement, Low-Frequency Electromagnetic Field

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