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

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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.

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Authors and Affiliations

  1. Department of Materials Science Engineering, Shanghai University, Shanghai, 200072, People’s Republic of China

    Xi Li

  2. EPM/SIMAP, Grenoble Institute of Technology, St Martin d’Heres Cedex, 38402, France

    Xi Li, Annie Gagnoud, Zhongming Ren & Yves Fautrelle

  3. Grenoble High Magnetic Field Laboratory, Grenoble Cedex 9, France

    François Debray

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  1. Xi Li
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  2. Annie Gagnoud
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  3. Zhongming Ren
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  4. Yves Fautrelle
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  5. François Debray
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Li, X., Gagnoud, A., Ren, Z. et al. Effect of strong magnetic field on solid solubility and microsegregation during directional solidification of Al-Cu alloy. Journal of Materials Research 28, 2810–2818 (2013). https://doi.org/10.1557/jmr.2013.271

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