| Microstructure Evolution of Cu-6%Ag Alloys by Modified Unidirectional Solidification Under a Horizontal Static Magnetic Field |
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| 作者姓名： | ZUO Xiao-wei ZHAO Cong-cong MA Ming WANG En-gang HE Ji-cheng |
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| 作者单位： | Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education),Northeastern University |
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| 基金项目： | Item Sponsored by the National Natural Science Foundation of China[No.51004038 and No.50901019];the Fundamental Research Funds for the Central Universities[No.N090309002];Wuhan National High Magnetic Field Center (Grant No.WHMFCKF2011007) ;National High Technology Research and Development Program of China (No.2007AA03Z519) ;the 111 Project of China (No.B07015) |
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| 摘 要： | The microstructure evolution of Cu dendrites in Cu-6%Ag alloys by modified unidirectional solidification under a static magnetic field has been investigated experimentally and quantitatively.The results show that the proeutectic Cu dendrites are finer when they are closer to the water-cooling copper mould and the unidirectional effect is more obvious,which is attributed to the higher solidification velocity.The quantitative analysis of the microstructure indicates that with increasing external magnetic flux density,the primary arms of the proeutectic Cu dendrites are refined and along a given direction.The analysis indicates that it is both the thermoelectromagnetic convection effect by the external magnetic field and the branch effect of the dendrites.
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| 关 键 词： | Cu-Ag unidirectional solidification microstructure evolution static magnetic field |
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