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Fatigue resistance of materials can be improved by: 1. Shot peening 2. Polishing the surface Which of the above is /are correct?

Fatigue resistance of materials can be improved by: 1. Shot peening 2. Polishing the surface Which of the above is /are correct? Correct Answer Both 1 and 2

Explanation:

Fatigue resistance of material can be improved by

(a) Shot peening

(b) Polishing the surface

Shot Peening: It is cold working process used to produce a compressive residual stress layer and modify mechanical properties of metals and composites.

Use in Part: Gears, camshafts, turbine blade, connecting rods, engine blocks.

Polishing refers to processes that use an abrasive that gave to the work surface.

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