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Effect of strong magnetic field on solid solubility and microsegregation during directional solidification of Al–Cu alloy

Published online by Cambridge University Press:  10 October 2013

Xi Li ,
Annie Gagnoud ,
Zhongming Ren ,
Yves Fautrelle  and
François Debray
Xi Li*
Affiliation:
Department of Materials Science Engineering, Shanghai University, Shanghai 200072, People’s Republic of China; and EPM/SIMAP, Grenoble Institute of Technology, St Martin d’Heres Cedex 38402, France
Annie Gagnoud
Affiliation:
EPM/SIMAP, Grenoble Institute of Technology, St Martin d’Heres Cedex 38402, France
Zhongming Ren
Affiliation:
Department of Materials Science Engineering, Shanghai University, Shanghai 200072, People’s Republic of China
Yves Fautrelle
Affiliation:
EPM/SIMAP, Grenoble Institute of Technology, St Martin d’Heres Cedex 38402, France
François Debray
Affiliation:
Grenoble High Magnetic Field Laboratory, Grenoble Cedex 9, France
*
a)Address all correspondence to this author. e-mail: lx_net@sina.com
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Abstract

The effect of a strong magnetic field on the solid solubility and the microsegregation during directional solidification of Al–Cu alloy at lower growth speeds (1–10 μm/s) has been investigated experimentally. Results indicate that the magnetic field causes the reduction of the grain boundary and promotes the amalgamation of the grains. Further, measurement results reveal that the magnetic field increases the solid solubility and decreases the microsegregation. It is also found that the value of the solid solubility increases as the magnetic field and the temperature gradient increase. The modification of the solid solubility and the microsegregation under the magnetic field is attributed to the thermoelectric magnetic force acting on the solid and the interdendritic thermoelectric magnetic convection. The present work may initiate a new method to enhance the solid solubility and to eliminate the microsegregation in Al-based alloys via an applied strong magnetic field during directional solidification.

Keywords

strong magnetic fieldsolid solubilitymicrosegregationAl–Cu alloy
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 20 , 28 October 2013 , pp. 2810 - 2818
Copyright
Copyright © Materials Research Society 2013 

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References

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