Microstructural Characteristics of Mg-Zn-Y Alloy Containing Quasicrystal Phase under Pulsed Magnetic Field

Abstract:

A novel pulsed magnetic field (PMF) processing has been employed for refining the microstructure of Mg-Zn-Y (Mg₉₃Zn₆Y) alloy in this work. Effect of PMF on the solidified microstructure of Mg₉₃Zn₆Y alloy containing icosahedral quasicrystalline phase (I-phase) was investigated. Experimental results show that solidified microstructure of Mg93Zn6Y alloy was significantly refined when the PMF was applied during solidification. I-phase in the entire cross-section of the billet changed from coarse, continuous and nonuniform morphology to uniform, fine and discontinuous morphology. In addition, primary α-Mg was significantly refined and also changed from developed dendrite to fine rosette. It was feasible to use PMF processing to refine the I-phase, because of its strong forced convection within the whole bulk melt.

• Periodical: Applied Mechanics and Materials (Volume 456)
• Pages: 482-485
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.456.482
• Online since: October 2013
• Authors: Lei Zhang*, Quan Zhou, Kun Luo, Lin Yang
• Keywords: Mg-Zn-Y Alloy, Microstructure, Pulsed Magnetic Field, Quasicrystal

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