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- W2897213695 abstract "Welding of thick section butt joints experiences limitations for different techniques. One option is to fill a narrow gap layer by layer with laser melted wire, a laser metal deposition technique where the complexity of a keyhole is avoided. The presented results show that wire addition can enable relatively thick layers. In particular, when electrically preheating the wire the process becomes more energy-efficient and favorable wetting conditions might be achieved. Since the wire was preheated by an electric current conducted through the wire to the workpiece, high speed imaging has shown that the wire tip can occasionally ignite small electric arcs. The wire deposited in the narrow gap also shows a fluctuating but self-stabilizing movement of the tip. Imperfections that have to be avoided are hot cracks, cavities, lack of fusion, and an irregular final weld surface topology. The technique shows high potential." @default.
- W2897213695 created "2018-10-26" @default.
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- W2897213695 date "2015-01-01" @default.
- W2897213695 modified "2023-09-27" @default.
- W2897213695 title "Narrow gap laser welding by multilayer hot wire addition" @default.
- W2897213695 hasPublicationYear "2015" @default.
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