摘要
使用自制改进的Bridgman定向凝固装置，探讨了直流横向稳恒磁场条件下，热电磁流体动力学效应（TEMHD）对Al-4．0Cu定向凝固组织的影响。牵引速度分别取20、50、100、200μm／s，随着磁感应强度由0～0．15T增大，组织粗化，有由典型的树枝晶向胞晶转化的趋势。利用热电磁流体动力学效应（TEMHD）和磁流体动力学效应（MHD）对此现象做出解释。
Effects of TEMHD on the microstructure of directionally solidified Al-4.0Cu alloy have been investigated by an optimized self-developed Bridgman directional solidification installation with a transverse direct current steady-state magnetic field.Microstructure is converted from typical dendrite to cell as the increase of magnetic induction intensity from 0 to 0.15 T with a tow-rate of 20 μm/s,50 μm/s,100 μm/s,200 μm/s,respectively The phenomenon was understood based on TEMHD and MHD(magnetic hydro-dynamic)effects.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2007年第1期16-18,共3页
Special Casting & Nonferrous Alloys
基金
辽宁省教育厅高校科研基金(2005L173)
