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Effect of Mould Materials on the As-Cast Microstructures of a Super-High Strength Al Alloy Cast by Low Frequency Electromagnetic Casting |
DONG Jie; LIU Xiaotao; ZHAO Zhihao; BAO Weiping; CUI Jianzhong |
The Key Laboratory of Electromagnetic Processing of Materials; Ministry of Education; Northeastern University; Shenyang 110004 |
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Cite this article:
DONG Jie; LIU Xiaotao; ZHAO Zhihao; BAO Weiping; CUI Jianzhong. Effect of Mould Materials on the As-Cast Microstructures of a Super-High Strength Al Alloy Cast by Low Frequency Electromagnetic Casting. Acta Metall Sin, 2004, 40(2): 215-219 .
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Abstract The effect of mould materials on the magnetic intensity in ingots
was numerically simulated, then the magnetic intensities without ingots
were measured, and some experiments were conducted to study these
effects. The results show that during low frequency electromagnetic
casting the mould with high electrical resistivity such as titanium alloy
can greatly reduce eddy loss of mould, thus increase useful power. At
the same condition, when the ingot was cast by titanium alloy mould
(high electrical resistivity), the microstructures is uniform and
fine, the average grain sizes at the border and center of the ingot are
24 μm and 27 μm respectively, but when the ingot was cast by
aluminum alloy mould (low electrical resistivity), the microstructures
of both the border and center of the ingot are coarse, their average
sizes are 38 μm and 45 μm. Furthermore, the mould with higher
electrical resistivity can increase the content of solute elements
within grains.
super-high strength Al alloy,
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Received: 21 February 2003
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