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← ScienceWhich consequence results when rapid quenching freezes nanocrystalline metal alloys?
A)Increased ductility despite grain boundaries✓
B)Formation of single-crystal domains quickly
C)Enhanced creep resistance reduces defects
D)Grain growth minimizes defect formation
💡 Explanation
Increased ductility results because rapid quenching leads to increased disorder within the grain boundary regions via the mechanism of increased free volume. Therefore, dislocations can move more easily, increasing ductility, rather than single-crystal formation which need slower directional solidification.
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