By definition, this is the process of working a metal surface to improve the material properties. This can be done in three major ways. These methods are mechanical means which involves using a hammer blows, blasting with shots, or passing the metal through a series of light beams. Peening was first done in Germany in the early nineties in order to make metal resistant to fatigue.
Later, the automotive industry adopted the method followed by the aircraft industry. In the mid-nineties, this method was refined and included in literature in engineering courses. The popularity of the method has since continued to grow, as it finds more use in more projects. The method was very useful in the invention of the super constellation aircraft. The invention of the laser version took this method to a whole new level.
Cold working or shot version of this process is applied in production of compressive residual stress layers. When applied on a metal its composite and mechanical properties get modified. Cold working entails blasting a metallic surface with shots of particles of ceramic, round metals, or glass. The blasting force gives the surface a deformation that is plastic in nature.
Cold working is used in many industries, which includes construction, aircraft, and automotive. Its function is to eliminate stress in components like crankshafts and steel automobiles and also to make them stronger. In construction, it is used to offer a muted finish on metal. This process is similar to sandblasting, except that instead of operating on the mechanism of abrasion, it operates on the mechanism of plasticity.
As discussed earlier, discovery of the laser version was a breakthrough in innovation. It utilizes the dynamic mechanical effects of an imparted shock wave to achieve the desired properties. It is accomplished using two components which are a transparent overlay and a high energy pulsed laser system. The overlay has to be thin and opaque to laser beam. An opaque overlay protects the target surface from potential detrimental thermal effects.
Overlay also provides consistent surfaces for laser beams as they strike the target. Generally, the cost of the entire process is reduced by using overlay. When in place they increase magnitudes of shocks entering the surfaces. Laser version is computerized unlike cold working. Laser version produces better results since it is monitored by a computer. It takes less time and is very efficient compared to other techniques.
The use of laser also allows for more textures to be produced than in cold working. The working of the laser version of this method involves the generation of shockwave within the work piece. The shock wave in turn leads to the creation if tensile and compressive residual stress in the work piece. The equilibrium state of the material is maintained by this stress. The surface layer is hardened by the shock wave as it fades into the material.
The new invention is this field is still used to achieve the same purpose except for a few modifications. New modifications include selective shaping of a metal surface using laser beams. Compressive residual stress forces metal to be flexible in selected parts. Controlled flexibility makes it easier to shape the metal into all desired shapes.
Later, the automotive industry adopted the method followed by the aircraft industry. In the mid-nineties, this method was refined and included in literature in engineering courses. The popularity of the method has since continued to grow, as it finds more use in more projects. The method was very useful in the invention of the super constellation aircraft. The invention of the laser version took this method to a whole new level.
Cold working or shot version of this process is applied in production of compressive residual stress layers. When applied on a metal its composite and mechanical properties get modified. Cold working entails blasting a metallic surface with shots of particles of ceramic, round metals, or glass. The blasting force gives the surface a deformation that is plastic in nature.
Cold working is used in many industries, which includes construction, aircraft, and automotive. Its function is to eliminate stress in components like crankshafts and steel automobiles and also to make them stronger. In construction, it is used to offer a muted finish on metal. This process is similar to sandblasting, except that instead of operating on the mechanism of abrasion, it operates on the mechanism of plasticity.
As discussed earlier, discovery of the laser version was a breakthrough in innovation. It utilizes the dynamic mechanical effects of an imparted shock wave to achieve the desired properties. It is accomplished using two components which are a transparent overlay and a high energy pulsed laser system. The overlay has to be thin and opaque to laser beam. An opaque overlay protects the target surface from potential detrimental thermal effects.
Overlay also provides consistent surfaces for laser beams as they strike the target. Generally, the cost of the entire process is reduced by using overlay. When in place they increase magnitudes of shocks entering the surfaces. Laser version is computerized unlike cold working. Laser version produces better results since it is monitored by a computer. It takes less time and is very efficient compared to other techniques.
The use of laser also allows for more textures to be produced than in cold working. The working of the laser version of this method involves the generation of shockwave within the work piece. The shock wave in turn leads to the creation if tensile and compressive residual stress in the work piece. The equilibrium state of the material is maintained by this stress. The surface layer is hardened by the shock wave as it fades into the material.
The new invention is this field is still used to achieve the same purpose except for a few modifications. New modifications include selective shaping of a metal surface using laser beams. Compressive residual stress forces metal to be flexible in selected parts. Controlled flexibility makes it easier to shape the metal into all desired shapes.
About the Author:
Get a summary of the factors to consider when choosing a shot peening company and more information about a reliable company at http://www.peening-consultants.com now.
Found your post interesting to read. I cant wait to see your post soon. Good Luck for the upcoming update. :) Thanks for sharing! Tree Service Richardson Texas
BalasHapus