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← TechnologyWhich consequence results, when a centrifugal casting mold's rotation significantly slows during pouring?
A)Increased porosity near the surface
B)Elevated surface oxidation scaling
C)Grain boundary carbide precipitation
D)Macrosegregation of alloying elements✓
💡 Explanation
Macrosegregation occurs because slowing rotation causes heavier, higher-melting-point alloying elements to settle towards cooler mold regions during solidification. Therefore, compositional inhomogeneity is promoted rather than uniform distribution, because centrifugal forces inadequately counteract gravitational settling.
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