Welding experiments using vacuum environment with Nd:YAG-laser

Miikka Karhu, Tommi Jokinen, Veli Kujanpää

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

    Abstract

    It is known that with electron beam welding produced in vacuum environment, deep and narrow welds with superior quality can be achieved. In some studies, this has inspired to use vacuum also with laser in order to improve already good performance achieved in atmospheric pressure. It has been reported that use of vacuum increases penetration, change profile of weld cross-section and produce less porosity. In this study bead-on-plate Nd:YAG-laser welding experiments were carried out in vacuum and in atmospheric pressure in order to clarify the effect of vacuum on penetration and weld bead geometry. Materials used in the experiments were austenitic stainless steels AISI 304L, AISI 316LN and basic mild steel S235. Evaluations of the welds were done by visually and macroscopically from the macro cross-sections. Also occurrence of weld defects was taken into account.
    Original languageEnglish
    Title of host publicationICALEO 2003: 22nd International Congress on Laser Materials Processing and Laser Microfabrication
    PublisherLaser Institute of America
    ISBN (Print)978-0-912035-75-8
    DOIs
    Publication statusPublished - 2003
    MoE publication typeA4 Article in a conference publication
    Event22nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2003 - Jacksonville, United States
    Duration: 13 Oct 200316 Oct 2003

    Conference

    Conference22nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2003
    CountryUnited States
    CityJacksonville
    Period13/10/0316/10/03

    Keywords

    • laser welding
    • Nd:YAG-laser
    • vacuum environment
    • penetration

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