| Investigation of the cooling rate ε was carried out for suction-cast rods and tube samples of various diameters by a dendrite spacing measurements for the Fe-25 wt.% Ni alloy. Exponential change of ε with the distance d from the sample surface was observed for 2 and 4 mm dia. rods and thin walled tubes, while uniform cooling rates were measured for the 1 mm dia rods. Much larger ε values were measured for the 1 mm dia. rod and thin walled tubes. |
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