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← TechnologyIn welded steel bridges, which risk dramatically increases when residual stresses aren't relieved via annealing?
A)Hydrogen-induced cracking during cooling✓
B)Increased damping of vibrational harmonics
C)Complete dissolution of surface oxides
D)Accelerated passivation against surface corrosion
💡 Explanation
Hydrogen-induced cracking (HIC) becomes probable because high residual stress enables hydrogen atoms to diffuse towards regions of high stress, leading to cracking; annealing minimizes residual stress, therefore avoiding HIC, rather than enhanced vibration damping.
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