Which outcome arises due to uneven cooling in early Chinese cast iron plowshares?

💡 Explanation

Brittle white cast iron forms because rapid cooling promotes cementite formation via the phase transformation mechanism, therefore a hard, but brittle edge results, rather than ductile grey iron with graphite, which requires slower cooling.

• Which consequence occurred when mass-produced Chinese crossbow trigger mechanisms experienced dimensional inconsistencies?
• Which consequence resulted from attempting Alhazen's water-filled glass sphere theory without sufficient geometric rigor?
• Which outcome resulted in rope bridges of the Inca civilization when using vegetable fiber rather than woven cable?
• Which degradation outcome limits long-term Byzantine mosaic visibility?
• Which advantage resulted from chinampa construction in the lacustrine environment of the Aztec civilization?
• Which consequence results when materials weather in dry stone Inca bridges?