Abstract
The microstructure and solidification process of three Al–Mg–Si alloys with different magnesium contents have been studied using optical microscopy and the electron probe X-ray microanalysis. The results showed that Al–Mg–Si alloys possessed fairly complicated solidification path: L→α-Al+L1→α-Al+Al15Si2(FeMn)3+L2→α-Al+Al15Si2(FeMn)3+ (α-Al+Mg2Si)+L3→α-Al+Al15Si2(FeMn)3+(α-Al+Mg2Si)+(α-Al+Mg2Si+Al15Si2(FeMn)3), and wide solidification temperature of 75 °C. The magnesium content in the alloys greatly influenced the as-cast microstructure. The higher the magnesium content, the more Mg2Si structure was present. Iron and manganese segregated to the finally solidified zone, which resulted in the formation of ternary eutectic structure. Although their content in the alloys was very low, their effect on solidification behaviour cannot be ignored.
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References
A. K. GUPTA, G. B. BURGER, P. W. JEFFREY and D. J. LLOYD, in “Proceedings of the 4th International Conference on Aluminium Alloys”, Vol. 2, edited by T. H. Sanders Jr and E. A. Starke Jr (Georgia Institute of Technology, Atlanta, 1994) p. 187.
W. S. MILLER, J. BOTTEMA, N. RAGHUNATHAN and R. GRIMBERGEN,ibid., Vol. 1, p. 410.
B. THANABOONSOMBUT and T. H. SANDERS Jr,ibid., Vol. 2, p. 197.
S. A. COURT, H. D. DUDGEON and R. A. RICKS,ibid., Vol. 1, p. 395.
DAN ZAO and P. K. CHAUDHURY,ibid., Vol. 1, p. 426.
G. J. MARSHALL, A. J. E. FLEMMING, A. GRAY and R. LLEWELLYN,ibid., Vol. 1, p. 467.
S. J. ANDERSEN,Metall. Trans. 26A (1995) 1931.
Q. WU and S. B. KANG,Scripta Met. Mater., to be published.
S. J. MURTHA, “New 6xxx aluminium automotive body sheet applications”, presented at the 1995 SAE International Conference, SAE Technical Paper Series 950718.
S. C. BERGSMA and M. E. KASSNER, in “Proceedings of the 4th International Conference on Aluminium Alloys”, Vol. 3, edited by T. H. Sanders Jr and E. A. Starke Jr (Georgia Institute of Technology, Atlanta, 1994) p. 187.
S. C. BERGSMA and M. E. KASSNER,ibid., Vol. 1, p. 403.
T. SAKURAI and T. ETO, in “Proceedings of the 3rd International Conference on Aluminium Alloys”, Vol. 1, edited by L. Arnberg, O. Lohne, E. Nes and N. Ryum (Norwegian Institute of Technology/SINTEF, Trondheim, 1992) p. 208.
Y. L. LIU, Z. Q. HU, Y. ZHANG and C. X. SHI,Metall. Trans. 24B (1993) 857.
Y. L. LIU and S. B. KANG,Mater. Sci. Tech. 12(1) (1996) 12.
L. F. MONDOLF, “Aluminium Alloys: Structure and Properties” (Butterworth, London, 1976) p. 567.
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LIU, Y.L., KANG, S.B. The solidification process of Al–Mg–Si alloys. Journal of Materials Science 32, 1443–1447 (1997). https://doi.org/10.1023/A:1018545732009
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DOI: https://doi.org/10.1023/A:1018545732009