Which risk increases when a molten metal alloy solidifies within a casting mold but external cooling intensifies?

💡 Explanation

Macrosegregation increases because localized compositional variations redistribute as the metal cools and solidifies; this process, called constitutional segregation, causes solute-rich liquid to flow toward cooler regions. Therefore, alloys will exhibit non-uniform composition rather than homogeneous distribution because of uneven cooling during casting.

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