Sometimes there is need to improve material properties of metal. This is achieved through peening. The process can be achievable through major 3 ways. The first technique involves using hammer blows where it is blasted with shots or passed through a series of light beams. This technology was first used in Germany in early nineties. Its main purpose was to make fatigue resistant metal.
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.
The shot version of the process also referred to as cold working was used to produce compressive residual stress layer. It also modifies the mechanical properties of metals and composites. It involves impacting a metal surface with a shot which are basically particles made of either round metals, glass or ceramic. The impact is done with force enough to create a deformation that is plastic in nature.
Aircraft, automotive, and construction industries are some of sectors where cold working is applied on large scale. It is applied because of its ability to relieve stress and strength components like crankshafts and steel automobile. A muted finish on metal is reason the construction industries need it. It is similar to sandblasting save for some differences. The main difference is that sandblasting works on mechanism of abrasion while it works on plasticity.
Like mentioned above, discovery of the laser version was a big breakthrough. It achieves desired properties through the dynamic mechanical effects of shock waves imparted on the metal. This method uses high energy pulsed laser system and transparent overlay in achieving the goal. The overlay needs to be thin and opaque in nature to the lase beam. The purpose of the opaque overlay is to offer protection to the target surface against detrimental thermal effects.
The overlay also provides a consistent surface for the laser beam to interact with the material of the target surface. It increases the magnitude of the shock entering the target this reduces the cost in general. The process utilizes computer control unlike cold working. This enables it produce practical results in matters pertaining to technologies, direct measuring among others. This also enables the process to be closely monitored in order to achieve the best results.
Diversity is another unique and important feature of laser version. With this technology different textures can be produced over the same surface. Cold working did not provide the feature of producing varied surfaces. Compressive and tensile residual stress is produced by laser version which introduces shockwaves on target surface. The stress is important as it keeps the material in its equilibrium state. When the stress fades into the target it hardens the surface layer.
Initially, laser was used to attain functional and property benefits. It finds use in shaping sections of a metal by choosing parts of the whole to work on. The residual stress that is generated allows for shaping of the work piece into any shape by causing it to flex controllably.
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.
The shot version of the process also referred to as cold working was used to produce compressive residual stress layer. It also modifies the mechanical properties of metals and composites. It involves impacting a metal surface with a shot which are basically particles made of either round metals, glass or ceramic. The impact is done with force enough to create a deformation that is plastic in nature.
Aircraft, automotive, and construction industries are some of sectors where cold working is applied on large scale. It is applied because of its ability to relieve stress and strength components like crankshafts and steel automobile. A muted finish on metal is reason the construction industries need it. It is similar to sandblasting save for some differences. The main difference is that sandblasting works on mechanism of abrasion while it works on plasticity.
Like mentioned above, discovery of the laser version was a big breakthrough. It achieves desired properties through the dynamic mechanical effects of shock waves imparted on the metal. This method uses high energy pulsed laser system and transparent overlay in achieving the goal. The overlay needs to be thin and opaque in nature to the lase beam. The purpose of the opaque overlay is to offer protection to the target surface against detrimental thermal effects.
The overlay also provides a consistent surface for the laser beam to interact with the material of the target surface. It increases the magnitude of the shock entering the target this reduces the cost in general. The process utilizes computer control unlike cold working. This enables it produce practical results in matters pertaining to technologies, direct measuring among others. This also enables the process to be closely monitored in order to achieve the best results.
Diversity is another unique and important feature of laser version. With this technology different textures can be produced over the same surface. Cold working did not provide the feature of producing varied surfaces. Compressive and tensile residual stress is produced by laser version which introduces shockwaves on target surface. The stress is important as it keeps the material in its equilibrium state. When the stress fades into the target it hardens the surface layer.
Initially, laser was used to attain functional and property benefits. It finds use in shaping sections of a metal by choosing parts of the whole to work on. The residual stress that is generated allows for shaping of the work piece into any shape by causing it to flex controllably.
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