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Which consequence results when lattice vacancies concentrate within metal alloys at elevated temperature?

A)Increased creep rate occurs
B)Elevated superconducting transition temperature
C)Increased resistance to oxidation
D)Decreased Hall effect magnitude

💡 Explanation

Increased vacancy concentration promotes dislocation climb, accelerating creep via diffusion; this is vacancy creep. Because the operative deformation mechanism changes, other options aren't related; oxidation resistance relates to surface passivation rather than bulk diffusion, therefore vacancies do not affect this parameter.

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