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Dynamik und Stabilität der Dampfkapillare beim Laserstrahltiefschweißen
Universität Bremen, Germany.ORCID iD: 0000-0003-0194-9018
2017 (German)Doctoral thesis, monograph (Other academic)
Abstract [en]

The keyhole which is typical for laser deep penetration welding is responsible for the highly dynamic process behavior, which results in unwanted pore and spatter formation. This work aims to better understand the dynamic keyhole properties and occurrence of process defects. Therefore, a semi-analytical model is developed and validated by optical emission analysis. Spatter characteristics are evaluated in high speed videos and porosity in x-ray analysis. Correlations between keyhole behavior and spatter and pore characteristics could show that pores can form due to a keyhole collapse and spatter detachment requires more than the momentum from keyhole wall fluctuations. Dynamic behavior and process defects are influenced by the spatial laser intensity distribution.

Place, publisher, year, edition, pages
Bremen: Bias Verlag , 2017. , p. 116
Keywords [en]
Laser deep penetration welding, keyhole dynamics, pore and spatter formation mechanisms
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-72390ISBN: 978-3-933762-57-3 (print)OAI: oai:DiVA.org:ltu-72390DiVA, id: diva2:1274385
Available from: 2018-12-30 Created: 2018-12-30 Last updated: 2019-01-17Bibliographically approved

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https://elib.suub.uni-bremen.de/peid=D00105959

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Volpp, Jörg

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