Acta Metallurgica Sinica (English Letters) >
Annular electromagnetic stirring-a new method for the production of semi-solid A357 aluminum alloy slurry
Received date: 2009-01-04
Revised date: 2009-03-14
Online published: 2009-12-16
A new method for producing semisolid slurry, annular electromagnetic stirring (A-EMS), to refine and spheroidize grains was exploited. Experimental work was undertaken to investigate the effects of cooling rate, stirring power and stirring time on the solidification behavior of A357 alloy using A-EMS. It was found that increasing the cooling rate and stirring power gave rise to substantial grain refinement, which could be attributed to the increase of effective nucleation rate caused by the extremely uniform temperature and composition fields in the bulk liquid during the initial stage of solidification. Results showed that a fully grain refined spherical structure could be obtained using proper processing conditions within 10s.
Key words： Semisolid; Annular electromagnetic stirring; A357
Guanglei ZHU , Jun XU , Zhifeng ZHANG , Yuelong BAI , Likai SHI . Annular electromagnetic stirring-a new method for the production of semi-solid A357 aluminum alloy slurry[J]. Acta Metallurgica Sinica (English Letters), 2009 , 22(6) : 408 -414 . DOI: 10.1016/S1006-7191(08)60116-7
[1] M.C. Flemings, Metall Trans 22A(5) (1991) 957.
[2] D.H. Kirkwood, Int Mater Rev 39 (1994) 173.
[3] Z. Fan, Int Mater Rev 47 (2002) 1.
[4] Z. Liu, W.M. Mao and Z.D. Zhao, Rare Met 26 (2006) 177.
[5] H. Kauhann, H.Wabusseg and P.J. Uggowitzer, Aluminum 76(1/2) (2000) 70.
[6] D. Apelian, Q.Y. Pan and M. Findon, Die Casting Engineer 48(1) (2004) 22.
[7] Y. Pan, S. Aoyama and C. Liu, Proc 5th Asian Foundry Congress, eds. G. Sun, H. Yuan, R. Yao and X. Yan (Southeast University Press, Nanjing, 1997) p.443.
[8] E. Tzimas and A. Zavaliangos, J Sci Eng A 289A (2000) 217.
[9] M. Suery, Proc of the 8th Int Conf on Semi-Solid Processing of Alloys and Composite (The Worcester Polytechnic Institute and the Metals Processing Institute, Limassol, Cyprus,2004).
[10] R.A. Martinez and M.C. Flemings, Metall Mater Trans 36A(8) (2005) 2205.
[11] H.M. Guo, X.J. Yang and B. Hu, Solid State Phenomena 116-117 (2006) 425.
[12] T. Li, X. Lin and W.D. Huang, Acta Mater 54 (2006) 4815. [13] A. Ohno, T. Motegi and H. Soda, Trans Iron Steel Inst Jpn 11 (1971) 18.
[14] Z. Fan and G. Liu, Sci Eng A 413-414 (2005)229.
[15] S. Ji, Z. Fan and M.J. Bevis, Mater Sci Eng A 299(1-2) (2001) 210.
[16] H.V. Atkinson and D.Liu, Mater Sci Eng A 496 (2008) 439.
/
| 〈 |
|
〉 |
WeChat