2
Procedure T e microstructure
prediction model was validated through com- parison of predicted and
measured microstructure distributions using virtual and real thermocouples. T e microstructures were evaluated for the two variants of the step casting with fi nal magnesium contents of
0.015% and 0.018% as well as selected locations in the engine block. T e locations within the crankcase cover areas of diff erent wall thickness and cooling rates to provide samples with
Fig. 3. Shown is a comparison of measured and calculated cooling curves in three characteristic locations of a crank case.
44 | METAL CASTING DESIGN & PURCHASING | Jul/Aug 2013 Fig. 4. Shown are the measured and simulated nodularities for the step casting and selected locations of the engine block. I-bars depict
the range of the measurements.
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