Effects of pulsed magnetic field with different parameters on solidification structure and mechanical properties of Mg-Y-Cu-Zr-Sr alloy reinforced by long-period structure by graphite casting were explored by OM

SEM

EDS

XRD

and universal tensile testing machine. The results show that pulsed magnetic field can improve the solidification structure and mechanical properties of Mg-Y-Cu-Zr-Sr alloy effectively. When the single pulse energy is at 0～57.6 J or the pulse period is at 0.1～1 s

with the increase of single pulse energy or the decrease of pulse period

grain size in the alloy is decreased gradually

and volume fraction of the second phase is increased gradually

so mechanical properties of the alloy are increased gradually at room temperature and high temperature. When the single pulse energy is 57.6 J and the pulse period is 0.1 s

grain size in the alloy is reduced by 39%

and volume fraction of the second phase is increased by 230%

so tensile strength and elongation of the alloy at room temperature are increased by 23% and 47%

and those of ones at high temperature are increased by 29% and 99%

respectively.