Peening: meaning, definitions and examples

metal working

Peening is a mechanical process that involves the plastic deformation of a material's surface to improve its mechanical properties. This technique is commonly used to enhance the fatigue strength of metals by inducing compressive residual stresses. It is often employed in aerospace and automotive industries, as well as in the repair of metal components. The peening process can be accomplished through various methods, including shot peening, where small spherical media is blasted onto the surface, or hammer peening, where a tool is used to strike the surface directly.

hammering, shot peening, surface hardening

Examples of usage

• The engineer recommended shot peening to increase the durability of the aircraft component.

• Hammer peening was applied to the metal frame to improve its resistance to fatigue.

• After welding, the parts underwent peening to relieve stresses.

• Using a peening technique can significantly enhance the lifespan of the machined parts.