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← HistoryWhich outcome occurred when early iron crossbow triggers exceeded temperature limits?
A)Reduced carbon allows easier machining
B)Rapid oxidation induced embrittlement failures✓
C)Increased ductility prevents trigger reset
D)Greater grain slide enhanced wear resistance
💡 Explanation
Rapid oxidation induces embrittlement failures because exceeding allowed heat treatment temperatures caused excessive grain boundary oxidation. Therefore, embrittlement, rather than increased machining, occurred due to oxygen diffusion weakening the iron structure.
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