Effect of Rotating and Pulsed Magnetic Field on Solidification Microstructure of Zn-2.75%Cu Peritectic Alloy
The effects of rotating magnetic field and pulsed magnetic field on the solidification structure of Zn-2.75%Cu peritectic alloy were studied.The results show that the solidification structure of Zn-2.75%Cu alloy is composed of primary dendritic and spherical ε-CuZn5 phase and matrix η phase,and the dendrites near the edge of the sample are coarser.After applying rotating magnetic field and pulsed magnetic field,the coarse and developed dendrites in the Zn-2.75%Cu peritectic alloy are gradually refined and transformed into fine and uniform spherical and rose-like structures.The ε phase becomes fine and round,the size decreases,and it changes to equiaxed crystal,the distribution is more uniform,and the number is significantly reduced.The primary ε phase at the center is smaller and fewer than that at the edge.The refinement effect of rotating magnetic field is more obvious,and the dendrite is completely transformed.
peritectic Zn-2.75%Cu alloyrotating magnetic fieldpulsed magnetic field
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