Skip to main content Accessibility help

Effect of a high axial magnetic field on the structure of directionally solidified Al–Si alloys

  • Dafan Du (a1), Zhenyuan Lu (a1), Annie Gagnoud (a2), Yves Fautrelle (a2), Zhongming Ren (a3), Xionggang Lu (a3), Rene Moreau (a4) and Xi Li (a5)...


The effects of an axial high magnetic field on the growth of the α-Al dendrites and the alignment of the iron-intermetallics (β-AlSiFe phases) in directionally solidified Al–7 wt% Si and Al–7 wt% Si–1 wt% Fe alloys were investigated experimentally. The results showed that the application of a high magnetic field changed the α-Al dendrite morphology significantly. Indeed, a high magnetic field caused the deformation of the α-Al dendrites and induced the occurrence of the columnar-to-equiaxed transition (CET). It was also found that a high magnetic field was capable of aligning the β-AlSiFe phases with the <001>-crystal direction along the solidification direction. Further, the Seebeck thermoelectric signal at the liquid/solid interface in the Al–7 wt% Si alloys was measured in situ and the results indicated that the value of the Seebeck signal was of the order of 10 µV. The modification of the α-Al dendrite morphology under the magnetic field should be attributed to the thermoelectric magnetic force acting on the α-Al dendrites. The magnetization force may be responsible for the alignment of the β-AlSiFe phases under the magnetic field.


Corresponding author

a) Address all correspondence to this author. email:


Hide All
1. Rooy, E.L.: Metals Handbook (ASM International, Materials Park, Ohio, 1988).
2. Hassan, S.B. and Aigbodion, V.S.: The effect of thermal ageing on microstructure and mechanical properties of Al-Si-Fe/Mg alloys. J. Alloys Compd. 486, 309 (2009).
3. Nafisi, S., Emadi, D., Shehata, M.T., and Ghomashchi, R.: Effects of electromagnetic stirring and superheat on the microstructural characteristics of Al-Si-Fe alloy. Mater. Sci. Eng., A 432, 71 (2006).
4. Joseph, S. and Kumar, S.: A systematic investigation of fracture mechanisms in Al-Si based eutectic alloy-effect of Si modification. Mater. Sci. Eng., A 588, 111 (2013).
5. Cepeda-Jiménez, C.M., Orozco-Caballero, A., García-Infanta, J.M., Zhilyaev, A.P., Ruano, O.A., and Carreño, F.: Assessment of homogeneity of the shear-strain pattern in Al-7wt%Si casting alloy processed by high-pressure torsion. Mater. Sci. Eng., A 597, 102 (2014).
6. Crepau, P.N.: Effect of iron in Al-Si casting alloys: A critical review. AFS Trans. 103, 361 (1995).
7. Mbuya, T.O., Odera, B.O., and Ng’ang’a, S.P.: Influence of iron on castability and properties of aluminium silicon alloys: Literature review. Int. J. Cast Met. Res. 16, 451 (2003).
8. Liu, L., Mohamed, A.M.A., Samuel, A.M., Samuel, F.H., Doty, H.W., and Valtierra, S.: Precipitation of β-Al5FeSi phase platelets in Al-Si based casting alloys. Metall Mater. Trans. A 40A, 2457 (2009).
9. Gorny, A., Manickaraj, J., Cai, Z.H., and Shankar, S.: Evolution of Fe based intermetallic phases in Al-Si hypoeutectic casting alloys: Influence of the Si and Fe concentrations, and solidification rate. J. Alloys Compd. 577, 103 (2013).
10. Sun, Z.H.I., Guo, M., Vleugels, J., Van der Biest, O., and Blanpain, B.: Strong static magnetic field processing of metallic materials: A review. Curr. Opin. Solid State Mater. Sci. 16, 254 (2012).
11. Hou, T.P. and Wu, K.M.: Alloy carbide precipitation in tempered 2.25 Cr-Mo steel under high magnetic field. Acta Mater. 61, 2016 (2013).
12. Peng, J., Liu, J.M., Wang, E.G., and Han, K.: The effects of high magnetic field on crystallization of Fe71(Nb0.8Zr0.2)6B23 bulk metallic glass. J. Alloys Compd. 581, 373 (2013).
13. Liu, K.M., Lu, D.P., Zhou, H.T., Chen, Z.B., Atrens, A., and Lua, L.: Influence of a high magnetic field on the microstructure and properties of a Cu-Fe-Ag in situ composite. Mater. Sci. Eng., A 584, 114 (2013).
14. Li, L., Zhao, Z.H., Zuo, Y.B., Zhu, Q.F., and Cui, J.Z.: Effect of a high magnetic field on the morphological and crystallographic features of primary Al6Mn phase formed during solidification process. J. Mater. Res. 28, 1567 (2013).
15. Molodov, D.A., Günster, C., and Gottstein, G.: Grain boundary motion and grain growth in zinc in a high magnetic field. J. Mater. Sci. 49, 3875 (2014).
16. Li, X., Ren, Z.M., Shen, Y., and Fautrelle, Y.: Effect of thermoelectric magnetic force on the array of dendrites during directional solidification of Al-Cu alloys in a high magnetic field. Philos. Mag. Lett. 92(12), 675 (2012).
17. Li, X., Fautrelle, Y., and Ren, Z.M.: Morphological instability of cell and dendrite during directional solidification under a high magnetic field. Acta Mater. 56, 3146 (2008).
18. Matheson, D.H., Wargo, M.S., Motakef, D., Carlson, J., and Nakos, A.: Dopant segregation during vertical Bridgman-Stockbarger growth with melt stabilization by strong axial magnetic fields. J. Cryst. Growth 85, 557 (1987).
19. Robertson, G.D. and O’Connor, D.: Magnetic field effects on float-zone Si crystal growth: II. Strong transverse fields. J. Cryst. Growth 76, 100 (1986).
20. Utech, H.P. and Flemings, M.C.: Elimination of solute banding in indium antimonide crystal by growth in a magnetic field. J. Appl. Phys. 37, 2021 (1966).
21. Shercliff, J.J.: Thermoelectric magnetohydrodynamics. J. Fluid Mech. 91, 231 (1979).
22. Lehmann, P., Moreau, R., Camel, D., and Bolcato, R.: Modification of interdendritic convection in directional solidification by a uniform magnetic field. Acta Mater. 46, 4067 (1998).
23. Favier, J.J., Garandet, J.P., Rouzaud, A., and Camel, D.: Mass transport phenomena during solidification in microgravity; preliminary results of the first mephisto flight experiment. J. Cryst. Growth 140, 237 (1996).
24. Sen, S., Dhindaw, B.K., Curreri, P.A., Peters, P., and Kaukler, W.F.: Measurement of interfacial undercooling in a dilute Pb-Sn alloy near the regime of morphological instability. J. Cryst. Growth 193, 692 (1998).
25. Pilling, J. and Hellawell, A.: Mechanical deformation of dendrites by fluid flow. Metall. Mater. Trans. A 27, 229 (1996).
26. Billia, B., Bergeon, N., Ngyuen Thi, H., Jamgotchian, H., Gastaldi, J., and Grange, G.: Cumulative mechanical moments and microstructure deformation induced by growth shape in columnar solidification. Phys. Rev. Lett. 93, 126105 (2004).
27. Morikawa, H., Sassa, K., and Asai, S.: Control of precipitating phase alignment and crystal orientation by imposition of a high magnetic field. Mater. Trans., JIM 39, 814 (1998).
28. Sugiyama, T., Tahashi, M., Sassa, K., and Asai, S.: The control of crystal orientation in non-magnetic metals by imposition of a high magnetic field. ISIJ Int. 43, 855 (2003).


Effect of a high axial magnetic field on the structure of directionally solidified Al–Si alloys

  • Dafan Du (a1), Zhenyuan Lu (a1), Annie Gagnoud (a2), Yves Fautrelle (a2), Zhongming Ren (a3), Xionggang Lu (a3), Rene Moreau (a4) and Xi Li (a5)...


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed