强磁场下电磁振荡对Al-4．5%Cu合金凝固组织的影响  

EFFECT OF ELECTROMAGNETIC VIBRATION ON THE SOLIDIFIED STRUCTURE OF A1-4.5%Cu ALLOY UNDER HIGH MAGNETIC FIELD

作　　者：余建波[1] 任忠鸣[1] 任维丽[1] 邓康[1] 王俊[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《金属学报》2008年第2期172-176,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金项目50234020和50225416;上海市科委重点项目04DZ14002资助~~

摘　　要：同时施加静磁场和交变电流后,Al—4.5晶粒的细化程度随电流的增大而增加,随磁场增加先增加后略有降低.XRD结果表明,施加磁场后,晶粒的〈111〉晶向沿磁场方向取向.晶粒取向度随晶粒的增大而降低.从球形颗粒旋转取向和颗粒迁移角度推导了晶体粒径和取向的关系.Under electromagnetic vibration with a strong magnetic field the morphology of α-Al in the solidified structure of hypoeutectic Al-4.5%Cu alloy was transferred from coarse dendrite to refined spheroid. At a constant magnetic flux density, the size of grains was decreased significantly with increasing current density. While at a constant current density, the refinement was increased firstly and then diminished appreciably with increasing magnetic flux density. XRD indicated that the （111） direction of refining grains were oriented towards the magnetic field direction. The orientation degree was increased with decreasing grain size. The relation between orientation and grain size was analyzed from crystal orientation and migration theory.

关 键 词：强磁场 交流电 电磁振荡 取向 AL合金 细化 

分 类 号：TG146.2[一般工业技术—材料科学与工程]