shot peening
What is shot peening?
Shot peening is a cold working process used to impart compressive residual stresses to the surface layers of components. It involves impacting a surface with shot (small spherical media). The shot acts like a tiny peening hammer, creating a small indentation or plastic deformation. This deformation induces a compressive residual stress at the surface, which improves fatigue life, resistance to wear, corrosion, and stress corrosion cracking. It is commonly used in aerospace, automotive, and other industries where fatigue resistance is critical.
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