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← ScienceWhich consequence results when excessive stress fractures induce fatigue?
A)Increased dislocation climb rate✓
B)Enhanced precipitate coarsening effect
C)Decreased ductile-brittle transition
D)Elevated grain boundary diffusion
💡 Explanation
Increased dislocation climb results from stress concentration at crack tips forcing vacancy diffusion, because atoms migrate to reduce strain energy therefore accelerating the fracture growth, rather than alternatives reliant on temperature or slow precipitate growth.
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