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← ScienceWhich risk increases when a turbine blade crystal cools unevenly?
A)Increased foreign object damage (FOD)
B)Accelerated oxidation due to friction
C)Promoted vacancy diffusion creep✓
D)Elevated gamma prime solvus temperature
💡 Explanation
Asymmetric cooling promotes vacancy diffusion creep because lattice structure stresses increase due to differential thermal contraction. Therefore, the material creeps faster at cooler spots, rather than causing FOD, oxidation, which is a near surface problem, or phase transitions.
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