Prediction of Microstructure and Distribution of Solute in Al-Zn-Mg Non-Dilute Alloys
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.
H. Balmori-Ramirez, J.G. Cabañas-Moreno, H.A. Calderon-Benavides, K. Ishizaki and A. Salinas-Rodriguez
J. L. Soto et al., "Prediction of Microstructure and Distribution of Solute in Al-Zn-Mg Non-Dilute Alloys", Materials Science Forum, Vol. 560, pp. 73-78, 2007