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← ScienceWhich risk increases when substantial crystal grain boundary depletion occurs?
A)Enhanced ductile fracture initiation
B)Improved corrosion resistance overall
C)Increased component creep life significantly
D)Accelerated intergranular stress corrosion cracking✓
💡 Explanation
Intergranular stress corrosion cracking risk increases because the mechanism is grain boundary diffusion allows corrosive species penetration. The material’s fracture toughness lowers; therefore, it becomes susceptible, rather than becoming ductile or improving long-term creep resistance in normal operations.
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