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Which outcome follows prolonged mechanical stress above yield strength within polycrystalline alloy?

A)Accelerated creep rate and total failure
B)Enhanced corrosion resistance forms passively
C)Increased resilience at the atomic junctions
D)Decreased dislocation mobility within the matrix

💡 Explanation

Creep accelerates drastically leading to total failure because dislocation climb is exacerbated; this is a thermally activated process. The increase in grain boundary sliding elevates vacancy diffusion, therefore the lifespan reduces, rather than other mechanisms reducing material failures.

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