Impact of Mg addition on solidification behaviour of Al-7% Si alloy
Date
2008
Authors
Nafisi, S.
Emadi, D.
Ghomashchi, R.
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Journal article
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Materials Science and Technology, 2008; 24(6):718-724
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S. Nafisi, D. Emadi, R. Ghomashchi
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Abstract
The impact of Mg addition to Al7Si alloy is investigated using thermal and image analyses. It is shown that Mg expands α-Al solidification range and eutectic forms over a thermal range. For alloys containing less than 0·6%Mg, differential scanning calorimetry analysis and thermodynamic calculations are incapable of predicting the formation of Mg2Si phase during solidification. Furthermore, Mg addition leads to the formation of greater percentage of α-Al primary phase which is beneficial during semisolid processing of hypoeutectic Al–Si alloys.
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