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← HistoryWhich outcome occurs when iron bridge components like those designed by Abraham Darby fail due to excessive static load?
A)Catastrophic brittle fracture propagates rapidly✓
B)Gradual plastic deformation reduces stress
C)Increased hardness improves tensile strength
D)Elongation increases overall structural integrity
💡 Explanation
Brittle fracture results because cast iron lacks ductility which means it fails suddenly in tension due to uncontrolled MICROCRACK FORMATION. Therefore, brittleness causes catastrophic failure rather than plastic deformation because cast iron molecular structure is too rigid.
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