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← ScienceWhich risk increases when casting molten aluminum solidifies, limited by mold cooling rate?
A)Micro-crack lattice framework instability forms
B)Dendritic growth causes alloying segregation✓
C)Annealing enables rapid thermal decomposition
D)Eutectic transformation initiates void destabilization
💡 Explanation
Dendritic growth becomes dominant because of slower heat extraction. This solidification mechanism favors non-equilibrium growth; so therefore solute atoms segregate to interdendritic regions, rather than forming a uniform mixture which decreases final product homogeneity.
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