Materials Transactions Online

Materials Transactions, Vol.46 No.01 (2005) pp.94-99
© 2005 The Japan Institute of Metals

Effect of Low-Frequency Electromagnetic Vibration on Cast-ability, Microstructure and Segregation of Large-Scale DC Ingots of a High-Alloyed Al

Dong Jie1,2,, Cui Jianzhong1, Zeng Xiaoqing2 and Ding Wenjiang2

1Key Lab of Electromagnetic Processing of Materials, Ministry of Education, P. O. Box 317, Northeastern University, Shenyang, 110004, P. R. China
2Light Alloy Net Forming National Engineering Research Center, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China

Low-Frequency Electromagnetic Vibrating Casting (LFEVC) was developed to cast large-scale highly alloyed Al-Zn-Mg-Cu-Zr ingots for super-high strength and toughness. Compared with conventional Direct Chilling Casting (DC), LFEVC can significantly improve surface quality, decrease hot-tearing tendency, generate finer, more uniform and equiaxed microstructures, and greatly suppress macro segregation and grain boundary segregation with increasing alternate and direct current ampere turns. In the range of alternate and direct current ampere turns employed in the experiments, the optimum condition is that the alternate current ampere turns is 9,000 At and the direct current ampere turns is 14,300 At.

(Received 2004/9/21; Accepted 2004/11/11)

Keywords: low-frequency electromagnetic vibration, casting, aluminum-zinc-magnesium-copper-zirconium, segregation

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REFERENCES

  1. T. M. Osman, P. M. Singh and J. J. Lewandowski: Scr. Metall. Mater. 31 (1994) 607--612.
  2. A. B. Pandey, B. S. Majumdar and D. B. Miracle: Metall. Mater. Trans. A29 (1998) 1237--1243.
  3. H. Adachi, K. Osamura, S. Ochiai, J. Kusui and K. Yokoe: Scr. Mater. 44 (2001) 1489--1492.
  4. C. G. Li, S. J. Wu, S. L. Dai and S. J. Yang: The Chinese journal of nonferrous metals (Special). 12 (2002) 14--21.
  5. C. Q. Chen: The Chinese journal of nonferrous metals (Special). 12 (2002) 22--27.
  6. Y. L. Wu, F. H. Froes, A. Alvarez, C. G. Li and J. Liu: Materials & Design. 18 (1997) 211--215.
  7. J. Kusui, K. Fujii, K. Yokoe, T. Yokote, K. Osamura, O. Kubota and H. Okuda: Mater. Sci. Forum. 217 (1996) 217--222.
  8. Q. Wei, B. Q. Xiong, Y. A. Zhang, B. H. Zhu and L. K. Shi: Transactions of Nonferrous Metals Society of China (English Edition). 11 (2001) 258--261.
  9. S. Asai: Sci. Technol. Adv. Mater. 1 (2000) 191--200.
  10. G. I. Eskin, G. S. Makarov and Pimenov and Yu P: Adv. Performance Mater. 21 (1995) 43--50.
  11. C. Vives: Metall. Trans. B B20 (1989) 623--629.
  12. C. Vives: Metall. Mater. Trans. B B7 (1996) 457--464.
  13. P. Desnian, F. Durand, Y. Fautrelle, D. Bloch, J. l. Meyer and J. P. Riquet: Light Metals TMS. (1988) 487--93.
  14. A. Radjia and K. Miwa: Metall. Mater. Trans. A A31 (2000) 755--62.
  15. S.-C. Lim, E.-p. Yon and J.-S. Kim: J. Mater. Sci. Lett. 16 (1997) 104--09.
  16. C. Vives: Metall. Mater. Trans. B B27 (1996) 445--55.
  17. C. Vives: Metall. Mater. Trans. B B27 (1996) 457--64.
  18. C. J. Paradies, R. N. Smith and M. E. Glichsman: Metall. Mater. Trans. A A28 (1997) 875--83.
  19. J. Pilling and A. Hellawell: Metall. Mater. Trans. A A27 (1996) 239--32.
  20. B. J. Zhang, J. Z. Cui, G. M. Lu, Q. Zhang and C. Y. Ban: Acta Metall. Sinica 38 (2002) 215--219.
  21. J. Dong, J. Z. Cui, F. X. Yu, C. Y. Ban and Z. H. Zhao: Metall. Mater. Trans A A35 (2004) 2487--2494.
  22. J. Dong: Study on semi-continuous casting process of super-high strength Al alloys under low-frequency electromagnetic field and its theory. Thesis, Northeastern University, Shenyang, China, 2004.
  23. C. Vives: Mater. Sci. Engng A A173 (1993) 169--172.

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