Laser Welding Process: A Review of Keyhole Welding Modelling
2015 (English)In: Physics Procedia, ISSN 1875-3892, E-ISSN 1875-3892, Vol. 78, 182-191 p.Article in journal (Refereed) Published
Laser welding is used in several industrial applications. It can be distinguished between conduction mode and keyhole mode welding, between pulsed wave and cw laser welding and between CO2-lasers with a wavelength of 10 μm and various laser types of about 1 μm wavelength. A deeper understanding of laser welding allows improving weld quality, process control and process efficiency. It requires a complementary combination of precise modelling and experimental investigations. The here presented review focuses on modelling of laser keyhole welding, for both wavelength regimes. First, the fundamentals of the laser welding process and its physics such as beam propagation, keyhole formation and melt pool dynamics are addressed. The main approaches for modeling energy transfer from laser beam to keyhole surface as well as fluid flow in the material are then discussed. The most relevant publications are systematically structured, particularly categorized with regard to the respective physical phenomena addressed. Finally some open questions are underlined.
Place, publisher, year, edition, pages
2015. Vol. 78, 182-191 p.
keyhole, liquid flow, vapor flow, melting, vaporization, plasma, Fresnel absorptions, inverse Bremsstralhung absorption, modeling.
Research subject ENGINEERING, Manufacturing and materials engineering
IdentifiersURN: urn:nbn:se:hv:diva-8728DOI: 10.1016/j.phpro.2015.11.042OAI: oai:DiVA.org:hv-8728DiVA: diva2:875268
15th Nordic Laser Materials Processing Conference, Nolamp 15