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Which outcome results when applying excessive torque to the bolted joint in a high-pressure chemical reactor?

A)Creep failure via plastic deformation
B)Hydrogen embrittlement crack propagation
C)Stress corrosion cracking accelerates failure
D)Galling increases thread shear stress

💡 Explanation

Plastic deformation precedes creep failure because excessive torque causes thread yielding through dislocation slip exceeding tensile yield strength. Therefore, creep occurs under constant load rather than stress corrosion, which requires specific chemical environments.

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