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← HistoryWhich outcome occurs when ancient bronze-smiths quenched rapidly as-cast bronze objects in cold water?
A)Increased hardness from martensite formation
B)Reduced ductility due to tin depletion
C)Improved corrosion resistance via passivation
D)Elevated brittleness from thermal stresses✓
💡 Explanation
When rapidly quenching as-cast bronze, thermal contraction generates uneven stress distributions because the exterior cools and contracts faster than the object core. Therefore elevated brittleness results, rather than hardness change, ductility loss or passivation which require different compositions/processing conditions.
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