Dr.-Ing. Sarah Seffer
Head of Joining and Cutting of Metals Group
Department of Multi-scale Production
E-Mail: s.seffer@lzh.dePhone: +49 511 2788-365
Short-Bio
Studied mechanical engineering at the Gottfried Wilhelm Leibniz University Hannover, graduated 2013 as an engineer (Dipl.-Ing.).
Since 2013, Sarah Seffer has been working at the Laser Zentrum Hannover e.V. (LZH). From 2013 to 2017 as a scientist in the Joining and Cutting of Metals Group. Since 2018 as Head of the Joining and Cutting of Metals Group in the Department of Multi-scale Production.
Main Research Areas
- Laser beam welding
- Laser beam brazing
- Laser beam-arc hybrid welding
- Process combinations
- Laser beam cutting
- Process development and optimization
LZH publications
Journal articles (reviewed) (49)
In-Process Control of Penetration Depth for Welding of Dissimilar Joints of Steel and Aluminum with Two Intersecting Laser Beams
Journal of Laser Applications
37
2025
Investigations on Opportunities and Challenges of Brilliant High-Power Laser Beam Welding with 24 kW and Adjustable Power Distribution for Different Materials
Proceedings ICALEO 2024 - The 43rd annual International Congress on Applications of Lasers & Electro-Optics
2025
Temporal power modulation in high power laser beam welding of round bars
Procedia CIRP
124
438-441
2024
Mechanisms of Increasing Weld Depth during Temporal Power Modulation in High Power Laser Beam Welding
Advanced Engineering Materials
2401386
2024
Characterization of laser-induced surface structures of aluminum in an oxygen-free atmosphere
Procedia CIRP
124
684-687
2024
Deep penetration welding of brass with subsequent wire filling process by laser beam with combined core and ring beam
Procedia CIRP
124
399-402
2024
Investigations on opportunities and challenges of brilliant high-power laser beam welding with 24 kW and adjustable power distribution for different materials
Journal of Laser Applications
4
36
042063
2024
Flussmittelfreies Laserstrahlhartlöten von Aluminiumlegierungen unter sauerstofffreier Atmosphäre
Tagungsband 5. Symposium Materialtechnik
2023
Investigations on improving the properties of laser beam welded thick dissimilar joints of steel and aluminum by using filler material
Journal of Laser Applications
4
35
042011
2023
Laser beam welding of brass with combined core and ring beam
Proc. International Congress on Applications of Lasers & Electro-Optics (ICALEO)
2023
Laser beam welding of brass with combined core and ring beam
Journal of Laser Applications
4
35
2023
Feasibility study for the manufacturing of hybrid pinion shafts with the cross-wedge rolling process
Int. J. Mater. Form.
45
16
2023
Investigations on laser beam welding of thin aluminum foils with additional filler wire
Journal of Laser Applications
4
35
2023
Feasibility study on multifrequency excitation of the melt pool during ultrasonic-assisted laser beam welding
Ultrasonics
131
106954
2023
Laser beam brazing of aluminum alloys in XHV-adequate atmosphere with surface deoxidation by ns-pulsed laser radiation
Journal of Laser Applications
2
34
022005
2022
Investigations on the Specifics of Laser Power Modulation in Laser Beam Welding of Round Bars
Lasers in Manufacturing and Materials Processing
9
469-480
2022
Investigations on the effect of standing ultrasonic waves on the microstructure and hardness of laser beam welded butt joints of stainless steel and nickel base alloy
Journal of Laser Applications
4
34
042014
2022
Emission of scattered radiation from the process zone of welding processes using high-power diode lasers
Procedia CIRP
111
864-869
2022
Laser Beam Welding of Thin Foils of Copper and Aluminum Using Different Laser Beam Sources Regarding Weld Seam Quality
Proceedings of the International Congress on Applications of Lasers & Electro-Optics (ICALEO®)
Macro 202
2022
Investigations on laser beam welding of thin foils of copper and aluminum regarding weld seam quality using different laser beam sources
Journal of Laser Applications
4
34
042011
2022
Deep Learning-Based Weld Contour and Defect Detection from Micrographs of Laser Beam Welded Semi-Finished Products
Applied Sciences
9
12
4645
2022
Multivariate parametric study on laser beam welding of copper lap joints using adjustable intensity profiles
Procedia CIRP
111
415-419
2022
Laser Beam Welding of Thick Steel Plates Using a High-Power Diode Laser Beam Source
Proc. International Congress on Applications of Lasers & Electro-Optics (ICALEO)
Macro 302
2022
Investigations on laser beam welding of thick steel plates using a high-power diode laser beam source
Journal of Laser Applications
4
34
042031
2022
Influence of process-related heat accumulation of laser beam welded 1.7035 round bars on weld pool shape and weld defects
Journal of Laser Applications
042007
33
1-8
2021
Investigations on high-power laser beam-submerged arc hybrid welding of thick duplex stainless steel using laser beam wobbling
Journal of Laser Applications
4
33
042039
2021
Investigations on the weld metal composition and associated weld metal cracking in laser beam welded steel copper dissimilar joints
J. Mater. Process. Tech.
296
117178
2021
Investigations on laser welding of dissimilar joints of stainless steel and copper for hot crack prevention
Journal of Laser Applications
4
33
042042
2021
Investigations on pulsed laser beam welding of thin steel sheets in lap configuration over the face side/parallel joint
Procedia CIRP
94
680-685
2020
Advantages of adjustable intensity profiles for laser beam welding of steel copper dissimilar joints
Procedia CIRP
94
661-665
2020
Improving the mechanical properties of laser beam welded hybrid workpieces by deformation processing
AIP Conference Proceedings
2113
040025
2019
Influence of ultrasonic amplitude and position in the vibration distribution on the microstructure of a laser beam welded aluminum alloy
Journal of Laser Applications
2
31
022402
2019
Investigation of the composite strength of hybrid steel-steel semi-finished products manufactured by laser beam welding and friction welding
IOP Conference Series: Materials Science and Engineering
461
012049
2018
Investigation of the joining zone of laser welded and cross wedge rolled hybrid parts
Int. J. Mater. Form.
6
11
829-837
2018
Influence of ultrasonic amplitude and position in the vibration distribution on the microstructure of a laser welded aluminum alloy
Proceedings of the International Congress on Applications of Lasers & Electro-Optics (ICALEO®)
404
2018
Laser beam joining of dissimilar joints of steel and aluminium alloy
Welding and Cutting
5
17
392-398
2018
Laser welding of dissimilar low-alloyed steel-steel butt joints and the effects
Journal of Laser Applications
3
30
032417-1 - 032417-6
2018
Dissimilar metal joints – laser based manufacturing processes for components of tomorrow
Proceedings 8th International Conference on Production Engineering and Management (PEM)
3-15
2018
Influence of Silicon on the Structure And Weldability of Steel-Aluminium Joints Processed by Non-Vacuum Electron Beam Welding
International Journal of Emerging Technology and Advanced Engineering
9
7
348-356
2017
Influence of beam position and ultrasonic amplitude on the micro-structure of laser welded dissimilar steel-steel joints
Proc. International Congress on Applications of Lasers & Electro-Optics (ICALEO)
1503
2017
Laser Soldering and Brazing of Steel-aluminum Sheets for Tailored Hybrid Tubes
Journal of Laser Applications
2
28
022429
2016
Journal articles (non-reviewed) (31)
Prozessstabilisierung beim Laserstrahlschweißen von Rundstangen unten Anregung durch Ultraschall
Tagungsband 24. Umformtechnisches Kolloquium Hannover
45-46
2024
Formschlüssiges Laserstrahlschweißen der Mischverbindung aus Stahl und Aluminium für betriebsfeste Halbzeuge im Schiffbau
Tagungsband Statustagung maritime Technologien
255-265
2024
Investigations on laser beam welding of thick dissimilar joints of steel and aluminum with two intersecting laser beams and additional material
Proceedings of the 43rd International Congress on Applications of Lasers and Electro-Optics (ICALEO)
2024
In-process control of penetration depth for welding of dissimilar joints of steel and aluminum with two intersecting laser beams
Proceedings of the 43rd International Congress on Applications of Lasers and Electro-Optics (ICALEO)
2024
Joining of Duplex Stainless Steels Using High-Power Laser Beam-Submerged Arc Hybrid Welding
Proceedings of the European Steel Technology and Application Days (ESTAD)
2023
Improving the Properties of Laser Beam Welded Thick Dissimilar Joints of Steel and Aluminum by Using Filler Material
Proc. International Congress on Applications of Lasers & Electro-Optics (ICALEO)
2023
Investigations on laser beam welding of thin aluminum foils with additional filler wire
Proc. International Congress on Applications of Lasers & Electro-Optics (ICALEO)
2023
Safety recommendations for 60 kW thick-plate welding in the maritime sector
Laser Systems Europe
2022
DIOMAR: Dickblechschweißen mittels Höchstleistungs-Diodenlaser für maritime Anwendungen
Tagungsband Statustagung maritime Technologien
15-33
2022
Flussmittelfreies Laserstrahlhartlöten von Aluminiumlegierungen in silandotierter Argonatmosphäre
Schweissen und Schneiden
9
73
635-639
2021
Untersuchungen zum Einfluss von SiC-Mikro- und -Nanopartikeln in einer Aluminiumgusslegierung auf Gefüge und Härte beim Laserstrahlschweißen
Schweissen und Schneiden
9
73
630-636
2021
Investigations on the weld seam geometry of ultrasonic assisted laser beam welded round bars in and beside antinode position
Proc. Lasers in Manufacturing (LiM)
2021
Kombination des Durchsetzfügens mit dem Laserstrahlschweißen – Einfluss der Parameter- und Werkstoffvariation auf die statischen Verbindungseigenschaften
Schweissen und Schneiden
1.2
73
46-51
2021
Laser beam-submerged arc hybrid welding of thick duplex stainless steel
Proc. International Congress on Applications of Lasers & Electro-Optics (ICALEO)
2021
High-Power Joining of Duplex Steels using Laser Beam-Submerged Arc Hybrid Welding
Proc. Lasers in Manufacturing (LiM)
2021
Laser beam-submerged arc hybrid welding of thick duplex steels for industry
Laser Systems Europe
20-21
2021
Investigations on the effect of different ultrasonic amplitudes and positions in the vibration distribution on the microstructure of laser beam welded stainless steel
SPIE Proceedings Vol. 11273: High-Power Laser Materials Processing: Applications, Diagnostics, and Systems IX
112730J
2020
Laserstrahlschweißen von Stahl-Kupfer-Mischverbindungen zur Herstellung von Schwingungskompensatoren im Rohrleitungsbau
Schweissen und Schneiden
5
282-286
2020
Investigations on welding of several materials with adjustable intensity profiles: new approaches and findings
SPIE Proceedings Vol. 11273: High-Power Laser Materials Processing: Applications, Diagnostics, and Systems IX
112730I
2020
Welding dissimilar metals in the shipbuilding and automotive industries
Laser Systems Europe
42
20-21
2019
Laser brazing of zinc-aluminum-magnesium coated steel – influence of the joint geometry
Proc. Lasers in Manufacturing (LiM)
2019
Innenhochdruckumgeformte, laserstrahlgelötete Tailored Hybrid Tubes aus Stahl-Aluminium-Mischverbindungen für den automobilen Leichtbau
Energie / Effiziente Verarbeitung zukunftsweisender Leichtbau Werkstoffe; Tagungsband T 44 des 37. EFB-Kolloquiums Blechverarbeitung 2017
125-133
2017
Leichtbau durch laserstrahlgefügte Stahl-Aluminium-Mischverbindungen
Schweissen und Schneiden
9
69
600-607
2017
Beeinflussung des Schmelzbades von Mischverbindungen im Laserstrahlschweißprozess durch Ultraschall
Tagungsband 2. Niedersächsisches Symposium Materialtechnik
4
259-268
2017
Laserschweißen verbindet unterschiedliche Materialien
phi - Produktionstechnik Hannover Informiert
3
2015
Innenhochdruckumformen laserstrahlgelöteter Tailored Hybrid Tubes aus Stahl-Aluminium-Mischverbindungen für den automobilen Leichtbau
EFB-Kolloquium Blechverarbeitung
175-184
2015
Conference papers (49)
SFB1153-A3 Ultraschallunterstütztes Laserstrahlschweißen von Rundstangen
CZM-Absolvententag
12. Juli
Clausthal-Zellerfeld
2024
Temporal power modulation in high power laser beam welding of round bars
13th CIRP Conference on Photonic Technologies (LANE)
15.-19. September
Fürth
2024
Ultraschallunterstütztes Laserstrahlschweißen zur Erzeugung umformbarer Mischverbindungen
24. Umformtechnisches Kolloquium Hannover (UKH)
13.03.2024
Garbsen
2024
Characterization of laser-induced surface structures of aluminum in an oxygen-free atmosphere
13th CIRP Conference on Photonic Technologies (LANE)
15.-19. September
Führt
2024
Flussmittelfreies Laserstrahllöten durch lokale Desoxidation
24. Umformtechnischen Kolloquium Hannover
13.-14. März
Garbsen
2024
Formschlüssiges Laserstrahlschweißen der Mischverbindung aus Stahl und Aluminium für betriebsfeste Halbzeuge im Schiffbau
Statustagung maritime Technologien
05. Dezember
Berlin
2024
Deep penetration welding of brass with subsequent wire filling process by laser beam with combined core and ring beam
13th CIRP Conference on Photonic Technologies (LANE)
16.-19. September
Fürth
2024
Deep penetration welding of brass with subsequent wire filling process by laser beam with combined core and ring beam
13th CIRP Conference on Photonic Technologies (LANE)
15.-19. September
Fürth
2024
Investigations on opportunities and challenges of brilliant high-power laser beam welding with 24 kW and adjustable power distribution for different materials
43nd International Congress on Applications of Lasers and Electro-Optics (ICALEO)
04.-07. November
Hollywood
2024
Investigations on laser beam welding of thick dissimilar joints of steel and aluminum with two intersecting laser beams and additional material
International Congress of Applications of Lasers & Electro-Optics (ICALEO)
04. November
Los Angeles
2024
In-process control of penetration depth for welding of dissimilar joints of steel and aluminum with two intersecting laser beams
International Congress of Applications of Lasers & Electro-Optics (ICALEO)
04. November
Los Angeles
2024
Flussmittelfreies Laserstrahlhartlöten von Aluminiumlegierungen unter sauerstofffreier Atmosphäre
5. Symposium Materialtechnik
23.-24. Februar 2023
Clausthal-Zellerfeld
2023
Joining of Duplex Stainless Steels Using High-Power Laser Beam-Submerged Arc Hybrid Welding
European Steel Technology and Application Days (ESTAD)
13.-15. Juni
Düsseldorf
2023
Laser Beam Welding of Brass with Combined Core and Ring Beam
International Congress on Applications of Lasers & Electro Optics (ICALEO)
16.-19. Oktober
Chicago
2023
Process-safe Joining by Means of New Wavelengths and Adapted Beam Distributions
IVAM LaserForum
13.-14. März
Aachen
2023
Investigations on Laser Beam Welding of Thin Aluminum Foils with Additional Filler Wire
International Congress on Applications of Lasers & Electro-Optics (ICALEO)
16.-19. Oktober
Chicago
2023
Influence of an oxygen-free atmosphere on laser beam brazing of aluminium with prior surface deoxidation by pulsed laser radiation
12th CIRP Conference on Photonic Technologies (LANE)
04.-08. September
Fürth
2022
Investigations on the effect of post treatment utilizing ultrasonic standing waves on the hardness of laser beam welds in stainless steel
12th CIRP Conference on Photonic Technologies (LANE)
04.-08. September
Fürth
2022
Investigations on the effect of standing ultrasonic waves on the microstructure and hardness of laser beam welded butt joints of stainless steel and nickel base alloy
International Congress on Applications of Lasers & Electro-Optics (ICALEO)
17.-20. Oktober
Orlando
2022
Emission of scattered radiation from the process zone of welding processes using high-power diode lasers
12th CIRP Conference on Photonic Technologies (LANE)
04.-08. September
Fürth
2022
Investigations on laser beam brazing of aluminium alloys in butt joint configuration within an oxygen-free atmosphere
Materials Science and Engineering (MSE)
27.-29. September
Darmstadt
2022
Investigations on microstructure and mechanical properties of laser beam-submerged arc hybrid welded butt joints of duplex stainless steel S31083 (t =16 mm)
12th CIRP Conference on Photonic Technologies (LANE)
04.-08. September
Fürth
2022
Flussmittelfreies Laserstrahllöten durch lokale Desoxidation
Industriekolloquium: Neue Potentiale für die Produktionstechnik
06. September
Garbsen
2022
Investigations on laser beam welding of thin foils of copper and aluminum regarding weld seam quality using different laser beam sources
International Congress of Applications of Lasers & Electro-Optics (ICALEO)
17.-20. Oktober
Orlando
2022
Multivariate parametric study on laser beam welding of copper lap joints using adjustable intensity profiles
12th CIRP Conference on Photonic Technologies (LANE)
04.-08. September
Fürth
2022
Laser Beam Welding of Thick Steel Plates Using a High-Power Diode Laser Beam Source
International Congress on Applications of Lasers & Electro-Optics (ICALEO)
17.-20. Oktober
Orlando
2022
Surface deoxidation of aluminium alloys with ns-pulsed laser radiation in XHV-adequate atmosphere for laser brazing processes
International Congress on Applications of Lasers & Electro-Optics (ICALEO)
18.-20. Oktober
online
2021
Investigations on the weld seam geometry of ultrasonic assisted laser beam welded round bars in and beside antinode position
Lasers in Manufacturing (LiM)
21.-24. Juni
online
2021
Laser Beam-Submerged Arc Hybrid Welding of Thick Duplex Stainless Steel
International Congress on Applications of Lasers & Electro Optics (ICALEO)
18.-20. Oktober
online
2021
High-Power Joining of Duplex Steels using Laser Beam-Submerged Arc Hybrid Welding
Lasers in Manufacturing (LiM)
21.-24. Juni
online
2021
Different approaches to prevent solidification cracking in laser beam welding stainless steel-copper dissimilar joints
International Congress on Applications of Lasers & Electro Optics (ICALEO)
18.-20. Oktober
online
2021
Investigations on pulsed laser beam welding of thin steel sheets in lap configuration over the face side/parallel joint
11th CIRP Conference on Photonic Technologies [LANE 2020]
06.-10. September
online
2020
Investigations on the effect of different ultrasonic amplitudes and positions in the vibration distribution on the microstructure of laser beam welded stainless steel
SPIE Photonics West: LASE
01.-06. Februar
San Francisco
2020
Introducing the concept of self sensing for ultrasonic assisted laser beam welding of 1.4301 stainless steel and 2.4856 nickel
The 17th International Workshop on Piezoelectric Materials and Applications in Actuators
22.-25. September
online
2020
Advantages of adjustable intensity profiles for laser beam welding of steel copper dissimilar joints
11th CIRP Conference on Photonic Technologies (LANE)
07.-10. September
online
2020
Investigations on welding of several materials with adjustable intensity profiles: new approaches and findings
SPIE Photonics West: LASE
01.-06. Februar
San Francisco
2020
Dynamic strength of laser brazed joints
11th CIRP Conference on Photonic Technologies (LANE)
07.-10. September
online
2020
Improving the mechanical properties of laser beam welded hybrid workpieces by deformation processing
22nd International ESAFORM Conference on Material Forming
08.-10. Mai
Vitoria-Gasteiz
2019
Joining of dissimilar materials for lightweight construction in automotive, aerospace and shipbuilding
6th Industrial Laser Applications Symposium (ILAS 2019)
20.-21. März
Crewe
2019
Lightweight construction for shipbuilding - welding of thick dissimilar joints of steel and aluminum alloys with high strength
Lasers in Manufacturing (LiM)
23.-27. Juni
München
2019
Laser brazing of zinc-aluminum-magnesium coated steel – influence of the joint geometry Autorinnen und Autoren
Lasers in Manufacturing (LiM)
23.-27. Juni
München
2019
Investigation of the composite strength of hybrid steel-steel semi-finished products manufactured by laser beam welding and friction welding
5TH INTERNATIONAL CONFERENCE on recent trends in structural materials (COMAT)
14.-16. November
Pilsen
2018
Influence of ultrasonic amplitude and position in the vibration distribution on the microstructure of a laser welded aluminum alloy
International Congress on Applications of Lasers & Electro-Optics (ICALEO)
14.-18. Oktober
Orlando
2018
Dissimilar metal joints – laser based manufacturing processes for components of tomorrow
International Conference on Production Engineering and Management (PEM)
04.-05. Oktober
Lemgo
2018
Influence of beam position and ultrasonic amplitude on the micro-structure of laser welded dissimilar steel-steel joints
International Congress on Applications of Lasers & Electro-Optics (ICALEO)
22.-26. Oktober
Atlanta
2017
Beeinflussung des Schmelzbades von Mischverbindungen im Laserstrahlschweißprozess durch Ultraschall
Niedersächsisches Symposium Materialtechnik
23.-24. Februar
Clausthal-Zellerfeld
2017
Efficient and Reliable Joining of Lightweight Materials
Stuttgart Laser Technology Forum
31. Mai-01. Juni
Stuttgart
2016
High power laser welding for several applications
OSA Laser Congress
30. Oktober-03. November
Boston
2016
Laser Soldering and Brazing of Steel-aluminum Sheets for Tailored Hybrid Tubes
International Congress on Applications of Lasers & Electro Optics (ICALEO)
18.-22. Oktober
Atlanta
2015
Books (2)
Fügen von Duplexstählen mittels Laserstrahl-UP-Hybridschweißen
Forschungsvereinigung Stahlanwendung e.V. (FOSTA)
Düsseldorf
Online-Ressource
2023
Innenhochdruckumformen laserstrahlgelöteter Tailored Hybrid Tubes aus Stahl/Aluminium-Mischverbindungen für den automobilen Leichtbau
Europäische Forschungsgesellschaft für Blechverarbeitung e.V.
Hannover
66, XVI Seiten
2017
Book chapters (2)
Kombination des Durchsetzfügens mit dem Laserstrahlschweißen – Einfluss der Parameter- und Werkstoffvariation auf die statischen Verbindungseigenschaften
In:
Jahrbuch Schweißtechnik 2023
DVS Media GmbH
Düsseldorf
2022
Influencing the weld pool during laser welding
In:
Advances in Laser Materials Processing: Technology, Research and Applications
Woodhead Publishing
Cambridge
2017