Utilisation of the X-ray emission of an electron beam capillary for visualisation of the beam-material interaction

Stefan Gach; Simon Olschok; Stefan Jakobs; Uwe Reisgen

doi:10.1515/mt-2021-2126

Article

Utilisation of the X-ray emission of an electron beam capillary for visualisation of the beam-material interaction

Stefan Gach
Stefan Gach, born in 1983, studied Mechanical Engineering and Product Development in Mechanical Engineering at the FH Aachen University of Applied Science and is actually working as a research engineer at the beam welding department of ISF Welding and Joining Institute of the RWTH Aachen University.
, Simon Olschok
Simon Olschok, born in 1972, studied Mechanical Engineering at the RWTH Aachen University. From 2002 to 2007, he worked as research engineer at the ISF Welding and Joining Institute of the RWTH Aachen University and received a doctorate in 2008 with the thesis “Hybrid Welding of Thick Plates”. Since 2007, he is the head of beam welding department at the ISF Welding and Joining Institute of the RWTH Aachen University.
, Stefan Jakobs
Stefan Jakobs, born in 1976, studied Mechanical Engineering at the RWTH Aachen University. From 2007 till 2020, he worked as research engineer at the ISF Welding and Joining Institute of the RWTH Aachen University and received a doctorate in 2015 with the thesis “Laserstrahlschweißen im Vakuum – Erweiterung der Prozessgrenzen für Dickwandige Bleche”.
and Uwe Reisgen
Uwe Reisgen, born in 1962, studied Mechanical Engineering at the RWTH Aachen University and received a doctorate at the ISF Welding and Joining Institute of the RWTH Aachen University in 1995 with a thesis on the research of wire feeding systems and their components for GMA Welding. Since 2007, he is the head of the ISF Welding and Joining Institute at the RWTH Aachen University.

Published/Copyright: March 9, 2022

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From the journal Materials Testing Volume 64 Issue 2

Abstract

Both processes, laser beam welding and electron beam welding, rely on the deep penetration process with the typical metal vapour capillary to achieve welds with in-creasing weld-in depths. With both processes, the capillary is the result of a highly dynamic equilibrium of various opposing forces and influences. To increase the understanding of the fluid-dynamic processes inside and around the vapour capillary, methods are needed for the supervision of the process that can deliver geometrical information with high spatial and temporal resolution and especially from the deeper capillary regions. Gaining this insight will allow the implementation of highly dynamic processes in future capillary models as well as the extension of process windows of the beam welding processes.

Keywords: electron beam welding (EBW); keyhole visualisation; process analysis; X-ray keyhole self luminaires; X-ray radiation

Corresponding author: Stefan Gach, M.Eng. IWE, Pontstraße 49, D 52062 Aachen, Germany, E-mail: gach@isf.rwth-aachen.de

In this article, first experiments on the visualisation of X-ray self-luminosity in electron beam welding are presented.

Funding source: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659

Award Identifier / Grant number: RE 2755/40-1

About the authors

Stefan Gach

Stefan Gach, born in 1983, studied Mechanical Engineering and Product Development in Mechanical Engineering at the FH Aachen University of Applied Science and is actually working as a research engineer at the beam welding department of ISF Welding and Joining Institute of the RWTH Aachen University.

Simon Olschok

Simon Olschok, born in 1972, studied Mechanical Engineering at the RWTH Aachen University. From 2002 to 2007, he worked as research engineer at the ISF Welding and Joining Institute of the RWTH Aachen University and received a doctorate in 2008 with the thesis “Hybrid Welding of Thick Plates”. Since 2007, he is the head of beam welding department at the ISF Welding and Joining Institute of the RWTH Aachen University.

Stefan Jakobs

Stefan Jakobs, born in 1976, studied Mechanical Engineering at the RWTH Aachen University. From 2007 till 2020, he worked as research engineer at the ISF Welding and Joining Institute of the RWTH Aachen University and received a doctorate in 2015 with the thesis “Laserstrahlschweißen im Vakuum – Erweiterung der Prozessgrenzen für Dickwandige Bleche”.

Uwe Reisgen

Uwe Reisgen, born in 1962, studied Mechanical Engineering at the RWTH Aachen University and received a doctorate at the ISF Welding and Joining Institute of the RWTH Aachen University in 1995 with a thesis on the research of wire feeding systems and their components for GMA Welding. Since 2007, he is the head of the ISF Welding and Joining Institute at the RWTH Aachen University.

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: The presented work was funded by the German Research Foundation (DFG) and experiments performed in the context of the project “ELS PoGo” (RE 2755/40-1, Project-ID: 278796746).
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Published Online: 2022-03-09

Published in Print: 2022-02-23

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Articles in the same Issue

https://doi.org/10.1515/mt-2021-2126

Keywords for this article

electron beam welding (EBW); keyhole visualisation; process analysis; X-ray keyhole self luminaires; X-ray radiation