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Which outcome occurs when a turbine overheats past a metallurgical phase's transition temperature?

A)Creep deformation accelerates non-linearly
B)Overall grain size becomes refined
C)Reduced susceptibility fatigue crack propagation
D)Elastic modulus increases proportionally

💡 Explanation

High temperature triggers creep due to vacancy diffusion; therefore, the turbine blades deform faster because this diffusion activates Coble Creep, rather than maintaining their original shape at lower temperatures.

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