Grain Refinement of 6061 Alloy by Low-Voltage Pulsed Magnetic Field Treatment

Abstract:

The influences of different pulse voltage and mold temperature on solidified structure of 6061 alloy under low-voltage pulsed magnetic field (LVPMF) were studied. The results show that grain of 6061 alloy can be refined greatly by LVPMF treatment. The dendrite growth is restrained and the microstructure is changed from larger dendrite grains to smaller nondendritic grains. When the pulse voltage is at 0V-300V, grain size of the alloy decreases as pulse voltage increases, and the primary phase degrades from developed dendrites into rose-like or spherical crystals. When the mold temperature is at 20°C-600°C, the decrease of mold temperature enhances the refinement effect of LVPMF processing. With the decrease of the mold temperature, grain size of the alloy decreases.

• Periodical: Advanced Materials Research (Volumes 652-654)
• Pages: 2413-2417
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.652-654.2413
• Online since: January 2013
• Authors: Quan Zhou, Yang Cao, Le Ping Chen
• Keywords: AA6061 Aluminum Alloy, Grain Refinement, Low-Voltage Pulsed Magnetic Field

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