脉冲磁场对Mg-Gd-Y-Zr合金组织中溶质含量的影响  

Effect of the Pulsed Magnetic Field on the Solute Content in Mg-Gd-Y-Zr Magnesium Alloy

作　　者：汪彬[1] 沈燕青[1] 朱天宇[1] 

机构地区：[1]浙江师范大学工学院

出　　处：《特种铸造及有色合金》2012年第5期407-409,共3页Special Casting & Nonferrous Alloys

基　　金：浙江省教育厅资助项目(Y201121135)

摘　　要：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。Effects of the frequency of the pulsed magnetic field on Mg-Gd-Y-Zr magnesium alloy during solidification process were investigated.With applying pulsed magnetic field during the solidification,the grain size can be refined.At the same time,the content of Gd or Y in the grain are increased,and the amount of eutectic structure on the grain boundary is also correspondingly decreased by applying the pulsed magnetic field of 10 Hz.The charged ions moves in a spiral way in the direction of magnetic force line with the action of pulsed magnetic field,and the periodic change of the magnitude and direction of electric field force restrains the free vibration of particles,resulting in the more energy potential barrier required to be overcome,which are responsible for the increase of solute content of Gd and Y in grains.

关 键 词：脉冲磁场 凝固 晶粒细化 MG-GD-Y-ZR镁合金 晶内溶质含量 

分 类 号：TG146.22[一般工业技术—材料科学与工程]