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← ScienceWhich outcome results when rapid cooling stresses a nickel-based superalloy turbine blade during operation?
A)Reduced creep resistance develops immediately✓
B)Erosion resistance becomes temporarily increased
C)Improved thermal conductivity happens subsequently
D)Density gradients begin to homogenize rapidly
💡 Explanation
Rapid cooling induces thermal stress exceeding the material's yield strength, causing dislocation climb within the crystal lattice. Dislocation climb decreases creep resistance because dislocations move more easily under subsequent stress; therefore, creep resistance lowers, rather than improves conductivity provided by even lattices.
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