Peening

Peening is the process of working a metal's surface to improve its material properties, usually by mechanical means such as hammer blows or by blasting with shot (shot peening). Peening is normally a cold work process (laser peening being a notable exception). It tends to expand the surface of the cold metal, thereby inducing compressive stresses or relieving tensile stresses already present. Peening can also encourage strain hardening of the surface metal.

Read more about Peening:  Residual Stress, Work Hardening, Use With Welding, History, See Also

Other articles related to "peening":

Laser Peening
... Laser peening, or laser shock peening (LSP), is the process of hardening or peening metal using a powerful laser ... Laser peening can impart a layer of residual compressive stress on a surface that is four times deeper than that attainable from conventional shot peening treatments ... Laser peening is often used to improve the fatigue resistance of highly stressed critical turbine engine components, and the laser (or component) is typically manipulated by an industrial ...
Shot Peening - History and Further Developments
... surface of the concave portion of leaf springs the peening effectively offset the maximum tensile stresses, also located on the surface, when the compressive stresses were induced by peening with a ball peen hammer ... Shot peening was independently invented in Germany and the United States in the late 1920s and early 1930s ... As a further development of the shot peening Laserpeening and High Frequency Impact Treatment process were developed ...
Shot Peening - Applications
... Shot peening is used on gear parts, cams and camshafts, clutch springs, coil springs, connecting rods, crankshafts, gearwheels, leaf and suspension springs, rock drills, and turbine blades ... Shot peening is a crucial process in spring making ... application, the mechanical design combined with some shot peening ensures longevity however, automotive makers are shifting to more high performance higher ...
Low Plasticity Burnishing - See Also
... High Frequency Impact Treatment aftertreatment of weld transitions Laser peening Metal fatigue Peening Residual stress Shot peening Stress corrosion ...