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Prediction of Microstructure and Distribution of Solute in Al-Zn-Mg Non-Dilute Alloys

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Abstract:

The microstructure of directional solidified Al-Zn-Mg alloys is characterized and predicted by means of thermal analysis data, multicomponent equations for dendrite growth and data from ternary AlZnMg phase diagram. The resulting microstructure consists of α-Al dendrites with τ precipitates and eutectic in interdendritic regions. Predictions show that at growth velocities up to 9 x 10-4 m/s, the α-Al and τ intermetallic grew simultaneously. Predictions for solute concentration according to the model for dendrite solidification of multicomponent alloys with unequal liquid diffusion coefficients show a good agreement with experimental results.

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Periodical:

Materials Science Forum (Volume 560)

Pages:

73-78

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.560.73

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Online since:

November 2007

Authors:

José Luis Soto, B. Campillo, J.A. Juarez-Islas

Keywords:

Ingots, Microstructure, Prediction, Solidification, Solute

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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