热电磁流体动力学效应对Al-4.0Cu定向凝固组织的影响

高志玉; 修凤玲; 张伟强

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热电磁流体动力学效应对Al-4.0Cu定向凝固组织的影响
Influence of Thermo-electric Magneto-hydrodynamic Effects（TEMHD）on the Microstructure of Directionally Solidified Al-4.0%Cu Alloy
2007年第1期页码：16-18
纸质出版日期： 2007 ，
DOI：

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[1]高志玉,修凤玲,张伟强.热电磁流体动力学效应对Al-4.0Cu定向凝固组织的影响[J].特种铸造及有色合金,2007(01):16-18+8.

Gao Zhiyu, Xiu Fengling, Zhang Weiqiang. Influence of Thermo-electric Magneto-hydrodynamic Effects（TEMHD）on the Microstructure of Directionally Solidified Al-4.0%Cu Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(1):16-18.
[1]高志玉,修凤玲,张伟强.热电磁流体动力学效应对Al-4.0Cu定向凝固组织的影响[J].特种铸造及有色合金,2007(01):16-18+8. DOI：

Gao Zhiyu, Xiu Fengling, Zhang Weiqiang. Influence of Thermo-electric Magneto-hydrodynamic Effects（TEMHD）on the Microstructure of Directionally Solidified Al-4.0%Cu Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(1):16-18. DOI：

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

·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。

Abstract

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.