Study of Filler Metal Mixing and its Implication on Weld Homogeneity of Laser-Hybrid and Laser Cold-Wire Welded Thick Austenitic Stainless Steel Joints

Miikka Karhu, Veli Kujanpää, Andrey Gumenyuk, Marco Lammers

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    11 Citations (Scopus)

    Abstract

    Austenitic stainless steel AISI 316L grade base material with butt joint thickness of 15 mm and different root gap preparation was single pass welded using both laser-GMA hybrid and laser cold-wire feeding process. The aim was to be able to study the filler metal mixing in thick section laser welding and the effect of processing parameters on it. Particular interest was to examine how homogenous filler metal mixing is across the whole weld cross-section from the weld surface to the root portion. Avesta 2205 duplex stainless steel filler wire was used in order to produce an over-matched weld metal composition differing from the base metal. Chromium was used as a trace-element as its distribution and quantity within the weld cross-section was identified using SEM and EDS analysis. Moreover, micro- and macroscopic metallography was carried out to examine emerged weld microstructures and their features. In the technical paper the effect of influencing parameters on the amount and homogeneity of filler metal mixing such as root gap preparation, wire feeding orientation (leading vs. trailing) and welding process (hybrid vs. cold wire) are compared and discussed.
    Original languageEnglish
    Title of host publication32nd International Congress on Applications of Lasers & Electro-Optics, ICALEO 2013
    Place of PublicationMiami
    PublisherLaser Institute of America
    Pages252-261
    ISBN (Print)978-0-912035-98-7
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA4 Article in a conference publication
    Event32nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2013 - Miami, United States
    Duration: 6 Oct 201310 Oct 2013
    Conference number: 32

    Conference

    Conference32nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2013
    Country/TerritoryUnited States
    CityMiami
    Period6/10/1310/10/13

    Keywords

    • laser welding
    • laser hybrid welding
    • mixing
    • homogeneity
    • austenitic stainless steel

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