纵向弱磁场对Al-0.85wt%Cu合金液固平界面稳定性的影响  

EFFECT OF WEAK LONGITUDINAL MAGNETIC FIELD ON INTERFACE STABILITY DURING DIRECTIONAL SOLIDIFICATION OF Al-0.85wt%Cu ALLOY

作　　者：丰建武[1] 樊亚夫[1] 李茂[1] 任维丽[1] 钟云波[1] 任忠鸣[1] 

机构地区：[1]上海大学上海市现代冶金与材料制备重点实验室,上海200072

出　　处：《上海金属》2012年第6期1-6,22,共7页Shanghai Metals

基　　金：国家自然科学青年基金资助项目(50701031)

摘　　要：以Al-0.85wt%Cu合金为研究对象,在实验和理论上研究了纵向稳恒弱磁场对液固界面稳定性的影响。实验结果表明,界面稳定性随着磁场强度的增加表现出先增强后减弱的规律。对界面前沿熔体内部流动场进行模拟分析得出,热电磁对流效应起主导作用时界面稳定性增强,磁制动起主要作用时界面稳定性减弱。The effect of steady weak longitudinal magnetic field on the interface stability of A1-0.85wt% Cu alloys was studied. The results showed that the interface stability firstly increased and then decreased with the increasing of magnetic field intensity. The fluid flow near the liquid solid interface under different magnetic fields was analyzed by numerical simulation in order to study the relationship between magnetic-field-induced fluid flow and interface stability. It was found that the TEMC turned the interface more stable, while the MHD did the opposite effect.

关 键 词：纵向弱磁场 定向凝固 Al-0 85wt%Cu合金界面稳定性 热电磁对流 

分 类 号：TG111.4[金属学及工艺—物理冶金]