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在Mg-Gd-Y-Zr镁合金凝固过程中施加脉冲磁场,通过改变脉冲磁场的脉冲频率,研究脉冲磁场对Mg-Gd-Y-Zr镁合金凝固的影响。结果表明,脉冲磁场使Mg-Gd-Y-Zr镁合金晶粒细化的同时,在10Hz外加脉冲磁场条件下使晶粒内部的合金元素Gd和Y的溶质含量增加,晶界析出的共晶含量相应减少。脉冲磁场使熔体内部的带电离子沿磁力线方向自旋运动,以及周期性变化的电场力对带电离子自由振动的抑制作用导致的溶质原子迁移所需的能量势垒增加是晶粒内部Gd、Y元素溶质含量增加的原因。
The effect of pulsed magnetic field on the solidification of Mg-Gd-Y-Zr magnesium alloy was investigated by changing the pulse frequency of pulsed magnetic field during the solidification of Mg-Gd-Y-Zr magnesium alloy. The results show that the pulsed magnetic field can refine the grain of Mg-Gd-Y-Zr magnesium alloy and increase the solute content of alloying elements Gd and Y in the grain boundary under the condition of 10Hz pulsed magnetic field. The eutectic The corresponding reduction in content. The impulsive magnetic field makes the charged ions in the melt spin along the direction of the magnetic flux and the energy barrier required for the migration of the solute atoms due to the inhibition of the free-vibration of the periodically changing electric field force is the internal Gd, Y The reason for the increase of elemental solute content.