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| Impreglon News Archive | Impreglon News
Now available from Southwest Impreglon … Shot Peening |  Southwest Impreglon now has the ability to not only do your coatings but can now handle your shot peening needs as well.
Shot peening is a cold working process in which the surface of a part is bombarded with small spherical media called shot. Each piece of shot striking the material acts as a tiny peening hammer, imparting to the surface a small indentation or dimple. In order for the dimple to be created, the surface fibers of the material must be yielded in tension. Below the surface, the fibers try to restore the surface to its original shape, thereby producing below the dimple, a hemisphere of cold worked material highly stressed in compression. Overlapping dimples develop an even layer of metal in residual compressive stress. It is well know that cracks will not initiate in a compressively stressed zone. Since nearly all fatigue and stress corrosion failures originate at the surface of a part, compressive stresses induced by shot peening provide considerable increases in part life. The maximum compressive residual stress produced at or under the surface of a part by shot peening is at least as great as half the yield strength of the material being peened. Many materials will also increase surface hardness due to the cold working effect of shot peening.
In short shot peening is a process in which different media are used to induce residual compressive stresses in specified surfaces, for the purpose of improving resistance to fatigue, stress corrosion cracking (scc) and galling.
For more information regarding our new capabilities, or a price quotation on shot peening please contact Greg Butler at the number below.
Greg Butler
President
281-441-2000
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