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Properties of high power laser weldments in structural steels
High power, high speed laser welding in greater thickness offers many advantages with regard to e.g. high productivity and low deformation. For some materials the process does however also imply special challenges due to among other things the very high cooling rates. Thus steels will at high welding speeds typically turn out to be fully martensitic in the 'weld metal' which for normalised steels means a relatively low ductility and high hardness. Further, the cooling rate is so that a high degree of overmachining normally will occur. As the weld is very narrow, the actual evaluation of the materials properties does also imply a number of challenges. This is for example the case with regard to evaluation of tensile test ductility and fracture toughness. The situation is somewhat similar to 'local brittle zones' in arc welding, and as it is the case there, no commonly agreed acceptance criteria exist in laser welding.
Properties of high power laser weldments in structural steels
High power, high speed laser welding in greater thickness offers many advantages with regard to e.g. high productivity and low deformation. For some materials the process does however also imply special challenges due to among other things the very high cooling rates. Thus steels will at high welding speeds typically turn out to be fully martensitic in the 'weld metal' which for normalised steels means a relatively low ductility and high hardness. Further, the cooling rate is so that a high degree of overmachining normally will occur. As the weld is very narrow, the actual evaluation of the materials properties does also imply a number of challenges. This is for example the case with regard to evaluation of tensile test ductility and fracture toughness. The situation is somewhat similar to 'local brittle zones' in arc welding, and as it is the case there, no commonly agreed acceptance criteria exist in laser welding.
Properties of high power laser weldments in structural steels
Möglichkeiten des Hochenergie-Laserschweißens bei Stahlkonstruktionen am Baustahl
Kristensen, J.K. (author) / Nielsen, S.E. (author)
1991
12 Seiten, 6 Bilder, 5 Tabellen, 18 Quellen
Conference paper
English
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