____________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength ?
Correct answer: B. Shot peening
- A. Lancing
- B. Shot peening
- C. Slugging
- D. Spinning
Explanation
Shot peening bombards a metal surface with small hard shots, producing compressive residual stresses that resist crack initiation and improve fatigue strength. The other terms do not describe this surface-strengthening process.
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