Within early Chinese cast iron crossbow triggers, which risk increased when alloy decarburization was incomplete?

💡 Explanation

Rapid cooling led to untempered martensite, and thus brittle fracture is more likely because the incomplete decarburization preserved high carbon areas. Therefore, the cast part is sensitive to impact, rather than experiencing creep or plastic deformation.

• Which agricultural limit was reduced by the Incan system of terrace contour construction?
• Which risk increases during Viking longship navigation near iron-rich coastal areas?
• Which positional outcome arose using an astrolabe to compute the time before standardized mean time?
• Which agricultural vulnerability emerges if an ancient chinampa soil barrier fails?
• Which consequence arises from incomplete cast iron cooling?
• Which ecological trade-off resulted when mountain terraces were constructed for agriculture?