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← HistoryWhich outcome occurs when a crucible containing molten bronze suddenly cools?
A)Internal stress causes metal cracking✓
B)Alloy composition becomes perfectly uniform
C)Ductility increases significantly overall
D)Increased corrosion resistance is observed
💡 Explanation
Quenching causes differential contraction rates, resulting in increased residual tensile stress because thermal gradients induce uneven solidification. This enhances the chance of brittle fracture, therefore cracking risk is higher rather than improved ductility within the metal.
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