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Effect of a transverse magnetic field on solidification structure in directionally solidified Al-40 wt% Cu alloys

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Abstract

Effect of a transverse magnetic field on macrosegregation and growth of primary Al2Cu dendrites in directionally solidified Al-40 wt% Cu alloys was investigated experimentally. The experimental results indicated that the magnetic field caused the formation of channel-like and freckle segregations. It was also found that the application of the magnetic field benefited the growth of primary Al2Cu dendrites and the axial segregation. Moreover, the magnetic field decreased the primary dendrite spacing and the mushy zone length; however these effects weakened with the increase of the magnetic field intensity. The above experimental results should be attributed to the formation of the thermoelectric magnetic convection during directional solidification under the transverse magnetic field.

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ACKNOWLEDGMENTS

This work is supported partly by the European Space Agency through the Bl-inter 09_473220, National Natural Science Foundation of China (Nos. 51271109 and 51171106), and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning.

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Authors and Affiliations

  1. State Key Laboratory Advanced Special Steel, Shanghai University, Shanghai, 200072, People’s Republic of China

    Hanxiao Li, Dafan Du & Xi Li

  2. SIMAP-EPM-Madylam/G-INP/CNRS, PHELMA, 38402, St Martin d’Heres Cedex, France

    Annie Gagnoud, Yves Fautrelle, Rene Moreau & Xi Li

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  1. Hanxiao Li
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  2. Dafan Du
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  3. Annie Gagnoud
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  4. Yves Fautrelle
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  6. Xi Li
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Correspondence to Xi Li.

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Li, H., Du, D., Gagnoud, A. et al. Effect of a transverse magnetic field on solidification structure in directionally solidified Al-40 wt% Cu alloys. Journal of Materials Research 31, 213–221 (2016). https://doi.org/10.1557/jmr.2015.396

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  • DOI: https://doi.org/10.1557/jmr.2015.396

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