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← ScienceWhich outcome occurs because dislocations move through turbine blade alloy crystal lattices causing it to undergo creep deformation?
A)Increased operating safety margin
B)Increased service life estimation
C)Reduced rupture stress threshold✓
D)Enhanced creep resistance properties
💡 Explanation
Elevated temperatures in turbine operation causes dislocation climb via vacancy diffusion, a diffusion-controlled creep mechanism. Therefore, dislocation movement lowers the stress required for rupture, rather than increasing it; alternative mechanisms like grain boundary sliding operate also.
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