Solidification Structure of 6063 Alloy under Pulsed Magnetic Field

Abstract:

The influences of pulsed magnetic field (PMF) on solidification structure of 6063 alloy were studied in this article. The results show that solidification structure of 6063 alloy can be refined with the application of PMF. The dendrite growth restrained and the macrostructure changed from large dendrite grains to fine equiaxed grains. The grain size decreased when the voltage increased from 0V to 600V. However, when the pulse frequency increased from 5Hz to 15Hz, the average grain size decreased continuously until reached a limit, and then the grains coarsened with further increase of the pulse frequency. The vibration caused by PMF not only made the temperature field of the melt uniform ,but also brook off the initial solidified grains formed on the cold wall of the mold, and spurs the grains to move to the center of melt which can be acted as nuclei.

• Periodical: Materials Science Forum (Volume 817)
• Pages: 355-359
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.817.355
• Online since: April 2015
• Authors: Shi Chao Liu, Hang Chen, Jun Jia Zhang, Peng Fei Wang, Jin Chuan Jie, Ting Ju Li*
• Keywords: 6063 Alloy, Grain Refinement, Pulsed Magnetic Field, Solidification Structure

References

[1] Atamanenko TV, Eskin DG, Zhang L, Katgerman L, Influence of ultrasonic melt treatment on structure formation in aluminium alloys with high amount of transitions metals, Metall Mater Trans A. 41 (2010) 2056–(2066).

DOI: 10.1007/s11661-010-0232-4

[2] Metan V, Eigenfeld K, Räbiger D, Leonhardt M, Eckert S. Grain size control in Al-Si alloys by grain refinement and electromagnetic stirring, Alloys Compd. 487 (2009): 163–172.

DOI: 10.1016/j.jallcom.2009.08.032

[3] Ramirez A, Qian M, Davis B, Wilks T, StJohn DH, Potency of high-intensity ultrasonic treatment for grain refinement of magnesium alloys, Scripta Mater. 59 (2008) 19–22.

DOI: 10.1016/j.scriptamat.2008.02.017

[4] Yan ZM, Li XT, Cao ZQ, Zhang XL, Li TJ, Grain refinement of horizontal continuous casting of the CuNi10Fe1Mn alloy hollow billets by rotating magnetic field , Mater Lett. 62 (2008) 4389-4392.

DOI: 10.1016/j.matlet.2008.07.010

[5] Chen H, Jie JC, Fu Y, Ma HJ, Li TJ, Grain refinement of pure aluminum by direct current pulsed magnetic field and inoculation, Trans Nonferrous Met Soc China. 24 (2014) 1295-300.

DOI: 10.1016/s1003-6326(14)63191-5

[6] Jian X, Xu H, Meek TT, Han Q, Effect of power ultrasound on solidification of aluminum A356 alloy, Mater Lett. 59 (2005) 190-193.

DOI: 10.1016/j.matlet.2004.09.027

[7] B.T. Zi, Q.C. Ba and J.Z. Cui, Effect of strong pulsed electromagnetic field on metal's solidification structure, Acta Physica Sinica. 49 (2000) 1010-1013 (In Chinese).

DOI: 10.7498/aps.49.1010

[8] B.T. ZI, Q.C. Ba and J.Z. Cui, Comparison of the solidified structures in LY12 Al-alloy under Pulsed Electic Current and Pulsed Magnetic Field, Scripta Mater. 43 (2000) 377-380.

[9] C.Y. Ban, J.Z. Cui and Q.X. Bal, Effect of strong PMF on solidification of aluminum LY12, Acta Metallurgica Sinica. 15 (2002) 380-384 (In Chinese).

[10] Y.L. Gao, Q.S. Li and Y.Y. Gong, Comparative study on structural transformation of low-melting pure Al and high-melting stainless steel under external pulsed magnetic field, Mater Lett. 61 (2007) 4011-4014.

DOI: 10.1016/j.matlet.2007.01.007