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← HistoryWhich risk increased for bronze tools when Mesopotamian smiths exceeded annealing temperature?
A)Reduced hardness from grain growth✓
B)Increased brittleness from oxidation
C)Decreased ductility from porosity
D)Elevated cracking initiation from segregation
💡 Explanation
When Bronze Age annealing temperatures exceeded optimal values, excessive grain growth occurred because increased thermal energy enhanced atomic mobility within the metal lattice, resulting grain boundary weakening. Therefore, reduced hardness occurred, rather than increased brittleness, decreased ductility, cracking, which arise through other mechanisms or alloy composition.
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