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Laser machining has great potential regarding automation in fabrication of CFRP (carbon-fiber-reinforced plastics) parts, due to the nearly force and tool-wear free processing at high process speeds. The high vaporization temperatures and the large heat conductivity of the carbon fibers lead to a large heat transport into the sample. This causes the formation of a heat-affected zone and a decrease...
During keyhole welding with lasers a surplus pressure has to act at the keyhole front which drives the molten material around the keyhole. Depending on the travel speed and keyhole diameter, its value can reach several bar and may, therefore, represent a significant contribution to the pressure balance in the keyhole. As a consequence, an effect also on its stability must be expected therefrom. On...
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