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- W2766219717 abstract "Abstract Welding production efficiency is usually optimised if full penetration can be achieved in a single pass. Techniques such as electron and laser beam welding offer deep high speed keyhole welding, especially since multi-kilowatt lasers became available. However, there are limitations for these techniques when considering weld imperfections such as weld cap undercuts, interior porosity or humps at the root. The thickness of sheets during full penetration welding is practically limited by these root humps. The mechanisms behind root morphology formation are not yet satisfactory understood. In this paper root humping is studied by reviewing previous studies and findings and also by sample examination and process observation by high speed imaging. Different process regimes governing root quality are presented, categorized and explained. Even though this study mainly covers laser beam and laser arc hybrid welding, the presented findings can generally be applied full penetration welding in medium to thick sheets, especially the discussion of surface tension effects. As a final result of this analysis, a map of methods to optimise weld root topology is presented." @default.
- W2766219717 created "2017-11-10" @default.
- W2766219717 creator A5018652143 @default.
- W2766219717 date "2018-02-01" @default.
- W2766219717 modified "2023-10-14" @default.
- W2766219717 title "Factors affecting weld root morphology in laser keyhole welding" @default.
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- W2766219717 doi "https://doi.org/10.1016/j.optlaseng.2017.10.005" @default.
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