Reduction in the grain size reduces the _______________ of the material?
Correct answer: C. Creep resistance
- A. Fatigue resistance
- B. Tensile strength
- C. Creep resistance
- D. All A., B. & C.
Explanation
Fine grains usually improve strength and fatigue resistance, but they reduce high-temperature creep resistance because the greater grain-boundary area promotes grain-boundary sliding. Therefore, creep resistance is the property reduced here.
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