Applicability study of pulsed laser beam welding on ferritic–martensitic ODS eurofer steel

Jia Fu*, Jurriaan van Slingerland, Hans Brouwer, Vitaliy Bliznuk, Ian Richardson, Marcel Hermans

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

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    Abstract

    Pulsed laser beam welding was used successfully to join the oxide dispersion-strengthened (ODS) Eurofer steel. The joining was conducted with a laser power of 2500 W and a pulsed duration of 4 ms. With the filler material being used, a minor material loss and microvoids were observed in the joint. The microstructure of the fusion zone consists of dual phase elongated structures. The heat-affected zone has a width of around 0.06 mm with finer grains. The transmission electron microscopy observation reveals that nanoprecipitates are finely distributed in the fusion zone. The tensile strength, yield strength and elongation of the joint are slightly inferior to the base material. The fractography results reveal a typical ductile fracture. The experimental results indicate a reasonable joint from the perspective of both the microstructure and mechanical behaviour.

    Original languageEnglish
    Article number736
    Number of pages9
    JournalMetals
    Volume10
    Issue number6
    DOIs
    Publication statusPublished - 2020

    Keywords

    • Electron microscopy
    • Laser welding
    • Mechanical properties
    • Microstructure
    • Oxide dispersion strengthened (ODS) alloy

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