The microstructure and distribution of alloying elements of
magnesium alloy ZK60 were studied experimentally and comparatively, which was solidified under the actions of no magnetic field, low-frequency a.c.
electromagnetic field and
magnetostatic field, separately. In addition, the distributions of different electromagnetic fields in the solidification process were simulated numerically. The results showed that applying either low-frequency a.c. electromagnetic field or
Magnetostatic field on the alloy in its solidification process can refine effectively grains and affect the distribution of alloying elements within the grain and on grain boundaries, with discontinuous
eutectic net structure found on grain boundaries. The effect of grain refining by magnetostatic field is evidently better than that by low-frequency a.c. electromagnetic field. Furthermore, the eutectic compounds aggregated on grain boundaries are reduced greatly, and lots of dispersive sphere-like particles of compounds are found within grains and in the vicinity of grain boundaries, which are beneficial to improving the overall properties of the magnesium alloy.
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