Which consequence occurred when impurities remained as ancient cast-crankshafts cooled?

💡 Explanation

Localized brittleness increased due to impurity segregation via the solidification mechanism during slow cooling; because impurities concentrate at grain boundaries, therefore crack propagation risk grew, rather than increased malleability occurring at grain boundaries for purified metal.

• Which mechanism limits the size of early cast iron Chinese bells?
• Which consequence follows when inaccuracies persist within a quipu?
• Which outcome occurred from inconsistent Bronze Age crossbow prod annealing?
• Which challenge did ancient Inca terrace farming specifically overcome, relating to water's downslope movement?
• Which outcome arises when an ancient Chinese crossbow uses poorly refined gunpowder, affecting its firing range?
• Which risk increases when supporting walls fail during pre-Columbian terracing?