The Impact of Partial Drainage on Chemical Composition of 356 Al-Si Alloy
A novel method is introduced to investigate the macro-segregation in 356 Al-Si alloy. In this method, a portion of the remaining liquid is extracted during solidification of the alloy from the bottom orifice of a cylindrical sample. Different parts of the sample plus the extracted material are chemically analyzed and a good correlation between the chemical composition and the predicted values from binary Al-Si diagram was obtained. Comparing the chemical composition of the decanted alloy in the cast piece with those of the 356 standard range has shown that even with 15% of the liquid extraction, the composition of the alloy is still within the intended range.
W.J. Poole, M.A. Wells and D.J. Lloyd
S. Nafisi, O. Lashkari, J. Langlais, R. Ghomashchi, "The Impact of Partial Drainage on Chemical Composition of 356 Al-Si Alloy", Materials Science Forum, Vols. 519-521, pp. 1765-1770, 2006