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Which mechanical failure accelerates when thermal stress cycles persist within turbine blades?

A)Creep rupture at grain boundaries
B)Oxidation increasing material porosity
C)Elastic deformation exceeds yield strength
D)Resonance within shroud dampens motion

💡 Explanation

High temperature gradients cause thermal stress. Creep occurs due to **vacancy diffusion** leading to plastic deformation; because boundary thickness decreases, it accelerates to rupture. Therefore, creep rupture is the likely consequence, rather than oxidation/deformation alternatives under these conditions.

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