by Jianzheng Guo and C. Beckermann, University of Iowa
The main objective of this research is to predict the nature and occurance of freckle defects in alloy solidification. Images of actual freckles from directionally solidified superalloy castings are contained in the following thumbnails (photos courtesy of A.F. Giamei, UTRC):
The following images are the color figures for a paper on the grid effect in simulating freckling: Guo, J., and Beckermann, C., “Three-Dimensional Simulation of Freckle Formation during Binary Alloy Solidification: Effect of Mesh Spacing,” Numerical Heat Transfer, Part A, Vol. 44, pp. 559-576, 2003.
The following images are for some ProCast simulations for a 10mmx10mmx30mm domain:
