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的运动情况进行分 析，电磁脉冲导致晶核的势能增加，促使初生 α--Al 颗粒 优先到达稳定位置，并最终决定其在基体中的分布状态． 参 考 文 献 ［1］ Qi J G，Wang J Z，Du H L，et al． Heredity of aluminum melt by electric pulse modification ( II) ． J Iron Steel Ｒes Int，2007，14 ( 5) : 76 ［2］ Dobroň P，Chmelík F，Yi S B，et al． Grain size effects on de￾formation twinning in an extruded magnesium alloy tested in com￾pression． Scripta Mater，2011，65( 5) : 424 ［3］ Jain A，Duygulu O，Brown D W，et al． Grain size effects on the tensile properties and deformation mechanisms of a magnesium al￾loy，AZ31B，sheet． Mater Sci Eng A，2008，486( 1-2) : 545 ［4］ Ghaderi A，Barnett M Ｒ． Sensitivity of deformation twinning to grain size in titanium and magnesium． Acta Mater，2011，59 ( 20) : 7824 ［5］ Li N L． Ｒesearch on Influence of Initial Microstructure and Deform￾ation Conditions on Microstructure and Texture Evolution of Hot-Ex￾truded AZ31 Magnesium Alloy ［Dissertation］． Chongqing: Chongqing University，2013 ( 李娜丽． 初始组织及变形条件对 AZ31 镁合金热挤压组织和 织构演变的影响研究［学位论文］． 重庆: 重庆大学，2013) ［6］ Qian M，Ｒamirez 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2010 ( 娄长胜． 强磁场下合金熔体中颗粒运动行为控制及其对凝 固组织演化的影响［学位论文］． 沈阳: 东北大学，2010) ［25］ Xu Z M，Li T X，Zhou Y H． An in situ surface composite pro￾duced by electromagnetic force． Mater Ｒes Bull，2000，35 ( 14- 15) : 2331 ［26］ Yasuda H，Ohnaka I，Kawakami O，et al． Effect of magnetic field on solidification in Cu-- Pb monotectic alloys． ISIJ Int， 2003，43( 6) : 942 ［27］ Lehmann P，Moreau Ｒ，Camel D，et al． Modification of inter￾dendritic convection in directional solidification by a uniform magnetic field． Acta Mater，1998，46( 11) : 4067 ［28］ Sun Z，Guo M，Verhaeghe F，et al． Magnetic interaction between two non-magnetic particles migrating in a conductive fluid in￾duced by a strong magnetic field-an analytical approach． Prog Electromagn Ｒes，2010，103: 1 · 4381 ·