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- W4200550579 abstract "Abstract Deep penetration laser welding is promising in joining thick (> 10 mm) steel sections. Focused laser beam by drilling vapour cavity, the keyhole, generates deep and narrow welds. Full penetration single-pass joining has a persistent problem with root quality where humping is one of the most frequent imperfection. This strongly hampers the use of high-power laser for thick plate welding. A 16 kW disk laser was used for single-pass welding of 15 mm thick plates in a butt joint configuration. Root humping occurred within a wide range of welding parameters. This provides narrow processing window. By adding an arc source to the laser beam process, the tendency of root humping increases. To achieve humping-free welds and consistent root quality over length, a delicate balance of process parameters is required. High heat input (> 0.50 kJ/mm) was positive to achieve a combination of low hardness (< 325 HV) and good Charpy toughness at -50 °C (> 50 J)." @default.
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- W4200550579 date "2021-11-01" @default.
- W4200550579 modified "2023-10-18" @default.
- W4200550579 title "Root formation and mechanical properties in laser keyhole welding of 15 mm thick HSLA steel" @default.
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- W4200550579 doi "https://doi.org/10.1088/1757-899x/1135/1/012011" @default.
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