Problem 4: (10%) Large slab-shaped steel castings are prone to develop porosity along their centerlines. The...
Problem 4: (10%) Large slab-shaped steel castings are prone to develop porosity along their centerlines. The outer surfaces of the casting solidify first, and porosity develops at the last places to solidifydue to shrinkage ofthe finalliquid there. Considerthe solidification ofan8cm thick slabofironcastinaspecialmold, consistingof sand (formingoneface)andsome