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    STP1418

    Reconstitution of Charpy-V Specimens with CO2 Laser Welding

    Published: 0


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    Abstract

    This paper reports on the reconstitution of reactor pressure vessel steel specimens with CO2-laser beam welding. Experiments were carried out using a 45 kW continuous wave (CW) CO2-laser with a power that varied between 9 to 32 kW. and a welding speed from 1 m/min to 5 m/min. The ability to weld pressure vessel steel by CW CO2-laser was investigated on 18MND5 steel. The laser welding parameters were optimised in accordance with the EN ISO 13919-1 standard. Qualification was performed and a procedure for reconstituting Charpy-V specimens by laser welding is established. Temperature measurements show rapid heating and cooling during the laser welding process. The maximum temperature is about 430°C at a distance of 2 mm from the weld joint and less than 300°C at a distance above 3.5 mm. Static three-point bend tests on un-notched specimens show good resistance of the weld in accordance to the RESQUE-procedure. Reconstituted Charpy-V specimens were impact tested and the results are in good agreement with non-reconstituted specimens.

    Keywords:

    reconstitution, CO, 2, laser welding, impact Charpy-V test, un-notched three-point bend test


    Author Information:

    Petrov, PI
    Visiting Scientist, SCK•CEN from Institute of Electronics, Sofia,

    Scibetta, M
    Lead scientist, Senior engineer, Lead scientist and Head of RMR Department, SCK•CEN, Mol,

    Puzzolante, J-L
    Lead scientist, Senior engineer, Lead scientist and Head of RMR Department, SCK•CEN, Mol,

    van Walle, E
    Lead scientist, Senior engineer, Lead scientist and Head of RMR Department, SCK•CEN, Mol,


    Committee/Subcommittee: E10.05

    DOI: 10.1520/STP10839S