When crafting Song Dynasty cannons, which outcome resulted from iron's tendency to absorb more carbon during the casting process?

💡 Explanation

Excess carbon absorption during casting resulted in cementite precipitation, causing increased hardness because it created iron carbide, therefore embrittling the cast iron, rather than enhancing its toughness or thermal properties.

• Which outcome occurs due to settlement beneath the foundations of a Roman castrum's curtain wall?
• Which problem plagued early gunpowder artillery, preventing accurate targeting?
• Which outcome occurred during high-altitude operation of complex geared astrolabes?
• Which failure mode risked early suspension bridges when gusting winds matched structure's frequency?
• Which consequence results when hydraulic terracing fails in ancient farming?
• Which outcome arises when timber ships, during the 18th century, exceeded longitudinal strength limits during construction?