---
_id: '61762'
abstract:
- lang: eng
text: "Abstract\r\n In punch-bending,
products such as brackets, electronic contacts or spring elements are produced
from wire-shaped semi-finished products using separation processes and several
successive forming processes. Within the multi-stage straightening and bending
processes, cross-stage and quantity-dependent effects have a significant influence
on the quality of the end product. In order to optimize the punch-bending process
with regard to the resulting component deviations and waste rate, this article
presents the concept of a digital twin for an innovative hybrid model of a multi-stage
punch-bending process. To ensure efficient development and implementation of the
digital twin, the graphical modeling notation DSL4DPiFS is used for additional
support. It makes it possible to derive the required interfaces of the Asset Administration
Shell of the hybrid data-driven model."
author:
- first_name: Henning
full_name: Peters, Henning
last_name: Peters
- first_name: Andreas
full_name: Mazur, Andreas
last_name: Mazur
- first_name: Ankit Kumar
full_name: Pandey, Ankit Kumar
last_name: Pandey
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Barbara
full_name: Hammer, Barbara
last_name: Hammer
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
citation:
ama: Peters H, Mazur A, Pandey AK, Trächtler A, Hammer B, Homberg W. Development
of a digital twin for data-driven modeling of punch-bending processes using a
graphical modeling notation. at - Automatisierungstechnik. 2025;73(3):173-184.
doi:10.1515/auto-2024-0112
apa: Peters, H., Mazur, A., Pandey, A. K., Trächtler, A., Hammer, B., & Homberg,
W. (2025). Development of a digital twin for data-driven modeling of punch-bending
processes using a graphical modeling notation. At - Automatisierungstechnik,
73(3), 173–184. https://doi.org/10.1515/auto-2024-0112
bibtex: '@article{Peters_Mazur_Pandey_Trächtler_Hammer_Homberg_2025, title={Development
of a digital twin for data-driven modeling of punch-bending processes using a
graphical modeling notation}, volume={73}, DOI={10.1515/auto-2024-0112},
number={3}, journal={at - Automatisierungstechnik}, publisher={Walter de Gruyter
GmbH}, author={Peters, Henning and Mazur, Andreas and Pandey, Ankit Kumar and
Trächtler, Ansgar and Hammer, Barbara and Homberg, Werner}, year={2025}, pages={173–184}
}'
chicago: 'Peters, Henning, Andreas Mazur, Ankit Kumar Pandey, Ansgar Trächtler,
Barbara Hammer, and Werner Homberg. “Development of a Digital Twin for Data-Driven
Modeling of Punch-Bending Processes Using a Graphical Modeling Notation.” At
- Automatisierungstechnik 73, no. 3 (2025): 173–84. https://doi.org/10.1515/auto-2024-0112.'
ieee: 'H. Peters, A. Mazur, A. K. Pandey, A. Trächtler, B. Hammer, and W. Homberg,
“Development of a digital twin for data-driven modeling of punch-bending processes
using a graphical modeling notation,” at - Automatisierungstechnik, vol.
73, no. 3, pp. 173–184, 2025, doi: 10.1515/auto-2024-0112.'
mla: Peters, Henning, et al. “Development of a Digital Twin for Data-Driven Modeling
of Punch-Bending Processes Using a Graphical Modeling Notation.” At - Automatisierungstechnik,
vol. 73, no. 3, Walter de Gruyter GmbH, 2025, pp. 173–84, doi:10.1515/auto-2024-0112.
short: H. Peters, A. Mazur, A.K. Pandey, A. Trächtler, B. Hammer, W. Homberg, At
- Automatisierungstechnik 73 (2025) 173–184.
date_created: 2025-10-08T16:10:34Z
date_updated: 2025-10-30T12:49:49Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
doi: 10.1515/auto-2024-0112
intvolume: ' 73'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1515/auto-2024-0112
oa: '1'
page: 173-184
publication: at - Automatisierungstechnik
publication_identifier:
issn:
- 0178-2312
- 2196-677X
publication_status: published
publisher: Walter de Gruyter GmbH
status: public
title: Development of a digital twin for data-driven modeling of punch-bending processes
using a graphical modeling notation
type: journal_article
user_id: '82875'
volume: 73
year: '2025'
...
---
_id: '59907'
abstract:
- lang: eng
text: Abstract. Flow forming is recognized for its precision in producing
rotationally symmetric components, but the use of metastable austenitic stainless
steel (AISI 304L) introduces challenges due to uncontrolled strain-induced α’
martensite formation. Variations in factors such as eccentricity and batch inconsistencies
lead to unpredictable microstructural profiles, limiting reproducibility [1,2].
This study addresses these issues by incorporating thermal actuators for cryogenic
cooling and induction heating to regulate forming temperatures, enabling control
of the α’-martensite content. Experimental investigations demonstrate that local
tempering during thermomechanical reverse flow forming produces discernible variations
in microstructure, affecting mechanical and magnetic properties [3]. Controlled
local adjustments of α’-martensite content allow for customization of properties
in seamless tubes, advancing manufacturing capabilities for complex, defect-free
components. The results presented demonstrate promising strategies for implementation
within the context of closed-loop property control in flow forming.
author:
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Julian
full_name: Rozo Vasquez, Julian
last_name: Rozo Vasquez
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: 'Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J, Walther F. Advanced
thermomechanical flow forming: A novel approach to α’-martensite control for enhanced
material properties. In: Carlone P, Filice L, Umbrello D, eds. Materials Research
Proceedings. Vol 54. Materials Research Forum LLC; 2025. doi:10.21741/9781644903599-127'
apa: 'Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., &
Walther, F. (2025). Advanced thermomechanical flow forming: A novel approach to
α’-martensite control for enhanced material properties. In P. Carlone, L. Filice,
& D. Umbrello (Eds.), Materials Research Proceedings (Vol. 54). Materials
Research Forum LLC. https://doi.org/10.21741/9781644903599-127'
bibtex: '@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_Walther_2025,
title={Advanced thermomechanical flow forming: A novel approach to α’-martensite
control for enhanced material properties}, volume={54}, DOI={10.21741/9781644903599-127},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Arian, Bahman and Homberg, Werner and Kersting, Lukas and Trächtler,
Ansgar and Rozo Vasquez, Julian and Walther, Frank}, editor={Carlone, Pierpaolo
and Filice, Luigino and Umbrello, Domenico}, year={2025} }'
chicago: 'Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian
Rozo Vasquez, and Frank Walther. “Advanced Thermomechanical Flow Forming: A Novel
Approach to α’-Martensite Control for Enhanced Material Properties.” In Materials
Research Proceedings, edited by Pierpaolo Carlone, Luigino Filice, and Domenico
Umbrello, Vol. 54. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-127.'
ieee: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, and F.
Walther, “Advanced thermomechanical flow forming: A novel approach to α’-martensite
control for enhanced material properties,” in Materials Research Proceedings,
Paestum, Italy, 2025, vol. 54, doi: 10.21741/9781644903599-127.'
mla: 'Arian, Bahman, et al. “Advanced Thermomechanical Flow Forming: A Novel Approach
to α’-Martensite Control for Enhanced Material Properties.” Materials Research
Proceedings, edited by Pierpaolo Carlone et al., vol. 54, Materials Research
Forum LLC, 2025, doi:10.21741/9781644903599-127.'
short: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther,
in: P. Carlone, L. Filice, D. Umbrello (Eds.), Materials Research Proceedings,
Materials Research Forum LLC, 2025.'
conference:
end_date: 2025-05-09
location: Paestum, Italy
name: The 28th International ESAFORM Conference on Material Forming - ESAFORM 2025
start_date: 2025-05-06
date_created: 2025-05-15T06:59:28Z
date_updated: 2025-10-30T13:55:08Z
department:
- _id: '156'
- _id: '153'
- _id: '241'
doi: 10.21741/9781644903599-127
editor:
- first_name: Pierpaolo
full_name: Carlone, Pierpaolo
last_name: Carlone
- first_name: Luigino
full_name: Filice, Luigino
last_name: Filice
- first_name: Domenico
full_name: Umbrello, Domenico
last_name: Umbrello
has_accepted_license: '1'
intvolume: ' 54'
keyword:
- Flow Forming
- Thermomechanical Forming
- α’-Martensite
- Property Control
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://mrforum.com/product/9781644903599-127/
oa: '1'
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: 'Advanced thermomechanical flow forming: A novel approach to α’-martensite
control for enhanced material properties'
type: conference
user_id: '36287'
volume: 54
year: '2025'
...
---
_id: '62024'
abstract:
- lang: eng
text: "Abstract\r\n This paper presents
a characterization of the microstructural evolution and its correlation with the
magnetic structure due to flow forming of semi-finished tubes of austenitic stainless
steel AISI 304L. The plastic deformation triggers a phase transformation of the
metastable austenite into α’-martensite.\r\n Depending
on the combination of production parameters, different fractions of strain-induced
α’-martensite were measured by means non-destructive micromagnetic techniques
and correlated with the evolution of hardness and the microstructure using electron
backscatter diffraction analyses. The magneto-optical Kerr effect analysis was
used as a tool to perform a qualitative analysis of the evolution of the magnetic
domain structure correlated with the formation of α’-martensite. An analysis of
these data allowed to derive surface magnetization hysteresis loops that were
compared with integral hysteresis loops of the specimens. It was proven by both
methods that the formation of martensite increases the magnetic energy and the
spontaneous magnetization of the specimens. The results of this investigation
contribute to a better understanding of micromagnetic sensors to monitor and control
the formation of α’-martensite in a flow forming. Furthermore, various techniques
have demonstrated the evolution of the magnetic properties of the material, which
can be applied in applications for invisible coding of workpieces."
author:
- first_name: Julian
full_name: Rozo Vasquez, Julian
last_name: Rozo Vasquez
- first_name: Jan
full_name: Tappe, Jan
last_name: Tappe
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: Rozo Vasquez J, Tappe J, Arian B, et al. Magneto-optical Kerr effect analysis
of strain-induced martensite formation during flow forming of metastable austenitic
steel AISI 304L. Practical Metallography. 2025;62(9-10):617-633. doi:10.1515/pm-2025-0059
apa: Rozo Vasquez, J., Tappe, J., Arian, B., Kersting, L., Homberg, W., Trächtler,
A., & Walther, F. (2025). Magneto-optical Kerr effect analysis of strain-induced
martensite formation during flow forming of metastable austenitic steel AISI 304L.
Practical Metallography, 62(9–10), 617–633. https://doi.org/10.1515/pm-2025-0059
bibtex: '@article{Rozo Vasquez_Tappe_Arian_Kersting_Homberg_Trächtler_Walther_2025,
title={Magneto-optical Kerr effect analysis of strain-induced martensite formation
during flow forming of metastable austenitic steel AISI 304L}, volume={62}, DOI={10.1515/pm-2025-0059}, number={9–10},
journal={Practical Metallography}, publisher={Walter de Gruyter GmbH}, author={Rozo
Vasquez, Julian and Tappe, Jan and Arian, Bahman and Kersting, Lukas and Homberg,
Werner and Trächtler, Ansgar and Walther, Frank}, year={2025}, pages={617–633}
}'
chicago: 'Rozo Vasquez, Julian, Jan Tappe, Bahman Arian, Lukas Kersting, Werner
Homberg, Ansgar Trächtler, and Frank Walther. “Magneto-Optical Kerr Effect Analysis
of Strain-Induced Martensite Formation during Flow Forming of Metastable Austenitic
Steel AISI 304L.” Practical Metallography 62, no. 9–10 (2025): 617–33.
https://doi.org/10.1515/pm-2025-0059.'
ieee: 'J. Rozo Vasquez et al., “Magneto-optical Kerr effect analysis of strain-induced
martensite formation during flow forming of metastable austenitic steel AISI 304L,”
Practical Metallography, vol. 62, no. 9–10, pp. 617–633, 2025, doi: 10.1515/pm-2025-0059.'
mla: Rozo Vasquez, Julian, et al. “Magneto-Optical Kerr Effect Analysis of Strain-Induced
Martensite Formation during Flow Forming of Metastable Austenitic Steel AISI 304L.”
Practical Metallography, vol. 62, no. 9–10, Walter de Gruyter GmbH, 2025,
pp. 617–33, doi:10.1515/pm-2025-0059.
short: J. Rozo Vasquez, J. Tappe, B. Arian, L. Kersting, W. Homberg, A. Trächtler,
F. Walther, Practical Metallography 62 (2025) 617–633.
date_created: 2025-10-30T12:22:54Z
date_updated: 2025-10-30T12:54:17Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
doi: 10.1515/pm-2025-0059
intvolume: ' 62'
issue: 9-10
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1515/pm-2025-0059
oa: '1'
page: 617-633
publication: Practical Metallography
publication_identifier:
issn:
- 2195-8599
- 0032-678X
publication_status: published
publisher: Walter de Gruyter GmbH
status: public
title: Magneto-optical Kerr effect analysis of strain-induced martensite formation
during flow forming of metastable austenitic steel AISI 304L
type: journal_article
user_id: '82875'
volume: 62
year: '2025'
...
---
_id: '62022'
abstract:
- lang: eng
text: Abstract. The incremental flow forming process features a large number
of process parameter combinations that can be varied from pass to pass or during
a pass. In the future however, a more efficient utilization of this large number
of process parameter combinations and a compensation of process disturbances could
be required. This is due to a rising demand for increasing the part complexity,
e.g. by graded property structures or a more complex geometry. In this context,
innovative approaches like closed-loop property control and optimal control are
advantageous, but require fast process models of flow forming that are not state
of the art. This paper thus proposes a new modelling approach of multi-pass flow
forming especially taking the transfer behavior between process parameters and
wall thickness evolution from pass to pass into focus. A hybrid modelling approach
is developed that combines knowledge about the incremental process character with
empirical data regression to a basic analytic relation. The basic relation is
further extended by a multi-layer neural network to enhance the overall model
accuracy. This hybrid modelling approach is finally validated using experimental
data. Thus, it is shown that a suitable model structure was found in context of
a future closed-loop control or optimal control for multi-pass flow forming.
author:
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Sharin Kumar
full_name: Gunasagran, Sharin Kumar
last_name: Gunasagran
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Julian
full_name: Rozo Vaszquez, Julian
last_name: Rozo Vaszquez
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: 'Kersting L, Gunasagran SK, Arian B, et al. Real-time modelling of incremental
multi-pass flow forming by a hybrid, data-based model. In: Materials Research
Proceedings. Vol 54. Materials Research Forum LLC; 2025. doi:10.21741/9781644903599-140'
apa: Kersting, L., Gunasagran, S. K., Arian, B., Rozo Vaszquez, J., Trächtler, A.,
Homberg, W., & Walther, F. (2025). Real-time modelling of incremental multi-pass
flow forming by a hybrid, data-based model. Materials Research Proceedings,
54. https://doi.org/10.21741/9781644903599-140
bibtex: '@inproceedings{Kersting_Gunasagran_Arian_Rozo Vaszquez_Trächtler_Homberg_Walther_2025,
title={Real-time modelling of incremental multi-pass flow forming by a hybrid,
data-based model}, volume={54}, DOI={10.21741/9781644903599-140},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Kersting, Lukas and Gunasagran, Sharin Kumar and Arian, Bahman and
Rozo Vaszquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank},
year={2025} }'
chicago: Kersting, Lukas, Sharin Kumar Gunasagran, Bahman Arian, Julian Rozo Vaszquez,
Ansgar Trächtler, Werner Homberg, and Frank Walther. “Real-Time Modelling of Incremental
Multi-Pass Flow Forming by a Hybrid, Data-Based Model.” In Materials Research
Proceedings, Vol. 54. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-140.
ieee: 'L. Kersting et al., “Real-time modelling of incremental multi-pass
flow forming by a hybrid, data-based model,” in Materials Research Proceedings,
2025, vol. 54, doi: 10.21741/9781644903599-140.'
mla: Kersting, Lukas, et al. “Real-Time Modelling of Incremental Multi-Pass Flow
Forming by a Hybrid, Data-Based Model.” Materials Research Proceedings,
vol. 54, Materials Research Forum LLC, 2025, doi:10.21741/9781644903599-140.
short: 'L. Kersting, S.K. Gunasagran, B. Arian, J. Rozo Vaszquez, A. Trächtler,
W. Homberg, F. Walther, in: Materials Research Proceedings, Materials Research
Forum LLC, 2025.'
date_created: 2025-10-30T12:16:37Z
date_updated: 2025-10-30T12:53:36Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
doi: 10.21741/9781644903599-140
intvolume: ' 54'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: 'https://doi.org/10.21741/9781644903599-140 '
oa: '1'
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
status: public
title: Real-time modelling of incremental multi-pass flow forming by a hybrid, data-based
model
type: conference
user_id: '82875'
volume: 54
year: '2025'
...
---
_id: '62023'
abstract:
- lang: eng
text: "Zusammenfassung\r\n Die Eigenschaftsregelung
mit einer online-Messung der Bauteileigenschaften ist ein in der Umformtechnik
viel diskutiertes, aber kaum validiertes Konzept, um den Automatisierungsgrad
bei der Bauteilfertigung weiter zu erhöhen. Dieser Artikel soll helfen, die Lücke
beispielhaft für den Fertigungsprozess des Drückwalzens metastabiler Austenite
zu schließen. Der metastabile austenitische Edelstahl ändert hierbei während der
Verformung seinen α′-Martensitgehalt und damit verbunden die magnetischen Eigenschaften.
Deshalb soll über die Regelung das definierte Einstellen des α′-Martensitgehaltes
möglich werden. Im Rahmen des vorliegenden Artikels wird gezeigt, wie mittels
des modellbasierten Entwurfs die Eigenschaftsregelung ausgelegt und parametriert
werden kann. Zudem beinhaltet der Artikel experimentelle Validierungsergebnisse
der zuvor entworfenen Eigenschaftsregelung."
author:
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Julian
full_name: Rozo Vasquez, Julian
last_name: Rozo Vasquez
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: Kersting L, Arian B, Rozo Vasquez J, Trächtler A, Homberg W, Walther F. Modellbasierter
Entwurf und Validierung einer Eigenschaftsregelung für das Drückwalzen metastabiler
Austenite. at - Automatisierungstechnik. 2025;73(7):527-540. doi:10.1515/auto-2024-0127
apa: Kersting, L., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg, W., &
Walther, F. (2025). Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung
für das Drückwalzen metastabiler Austenite. At - Automatisierungstechnik,
73(7), 527–540. https://doi.org/10.1515/auto-2024-0127
bibtex: '@article{Kersting_Arian_Rozo Vasquez_Trächtler_Homberg_Walther_2025, title={Modellbasierter
Entwurf und Validierung einer Eigenschaftsregelung für das Drückwalzen metastabiler
Austenite}, volume={73}, DOI={10.1515/auto-2024-0127},
number={7}, journal={at - Automatisierungstechnik}, publisher={Walter de Gruyter
GmbH}, author={Kersting, Lukas and Arian, Bahman and Rozo Vasquez, Julian and
Trächtler, Ansgar and Homberg, Werner and Walther, Frank}, year={2025}, pages={527–540}
}'
chicago: 'Kersting, Lukas, Bahman Arian, Julian Rozo Vasquez, Ansgar Trächtler,
Werner Homberg, and Frank Walther. “Modellbasierter Entwurf Und Validierung Einer
Eigenschaftsregelung Für Das Drückwalzen Metastabiler Austenite.” At - Automatisierungstechnik
73, no. 7 (2025): 527–40. https://doi.org/10.1515/auto-2024-0127.'
ieee: 'L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, and F.
Walther, “Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung für
das Drückwalzen metastabiler Austenite,” at - Automatisierungstechnik,
vol. 73, no. 7, pp. 527–540, 2025, doi: 10.1515/auto-2024-0127.'
mla: Kersting, Lukas, et al. “Modellbasierter Entwurf Und Validierung Einer Eigenschaftsregelung
Für Das Drückwalzen Metastabiler Austenite.” At - Automatisierungstechnik,
vol. 73, no. 7, Walter de Gruyter GmbH, 2025, pp. 527–40, doi:10.1515/auto-2024-0127.
short: L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, F. Walther,
At - Automatisierungstechnik 73 (2025) 527–540.
date_created: 2025-10-30T12:21:42Z
date_updated: 2025-10-30T12:53:56Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
doi: 10.1515/auto-2024-0127
intvolume: ' 73'
issue: '7'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: 'https://doi.org/10.1515/auto-2024-0127 '
oa: '1'
page: 527-540
publication: at - Automatisierungstechnik
publication_identifier:
issn:
- 0178-2312
- 2196-677X
publication_status: published
publisher: Walter de Gruyter GmbH
status: public
title: Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung für das
Drückwalzen metastabiler Austenite
type: journal_article
user_id: '82875'
volume: 73
year: '2025'
...
---
_id: '62021'
author:
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Julian
full_name: Rozo Vasquez, Julian
last_name: Rozo Vasquez
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: Kersting L, Arian B, Rozo Vasquez J, Trächtler A, Homberg W, Walther F. State-space
modelling approach for control and observer design in property-controlled reverse
flow forming. IFAC-PapersOnLine. 2025;59(1):109-114. doi:10.1016/j.ifacol.2025.03.020
apa: Kersting, L., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg, W., &
Walther, F. (2025). State-space modelling approach for control and observer design
in property-controlled reverse flow forming. IFAC-PapersOnLine, 59(1),
109–114. https://doi.org/10.1016/j.ifacol.2025.03.020
bibtex: '@article{Kersting_Arian_Rozo Vasquez_Trächtler_Homberg_Walther_2025, title={State-space
modelling approach for control and observer design in property-controlled reverse
flow forming}, volume={59}, DOI={10.1016/j.ifacol.2025.03.020},
number={1}, journal={IFAC-PapersOnLine}, publisher={Elsevier BV}, author={Kersting,
Lukas and Arian, Bahman and Rozo Vasquez, Julian and Trächtler, Ansgar and Homberg,
Werner and Walther, Frank}, year={2025}, pages={109–114} }'
chicago: 'Kersting, Lukas, Bahman Arian, Julian Rozo Vasquez, Ansgar Trächtler,
Werner Homberg, and Frank Walther. “State-Space Modelling Approach for Control
and Observer Design in Property-Controlled Reverse Flow Forming.” IFAC-PapersOnLine
59, no. 1 (2025): 109–14. https://doi.org/10.1016/j.ifacol.2025.03.020.'
ieee: 'L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, and F.
Walther, “State-space modelling approach for control and observer design in property-controlled
reverse flow forming,” IFAC-PapersOnLine, vol. 59, no. 1, pp. 109–114,
2025, doi: 10.1016/j.ifacol.2025.03.020.'
mla: Kersting, Lukas, et al. “State-Space Modelling Approach for Control and Observer
Design in Property-Controlled Reverse Flow Forming.” IFAC-PapersOnLine,
vol. 59, no. 1, Elsevier BV, 2025, pp. 109–14, doi:10.1016/j.ifacol.2025.03.020.
short: L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, F. Walther,
IFAC-PapersOnLine 59 (2025) 109–114.
date_created: 2025-10-30T12:14:01Z
date_updated: 2025-10-30T12:53:16Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
doi: 10.1016/j.ifacol.2025.03.020
intvolume: ' 59'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: 'https://doi.org/10.1016/j.ifacol.2025.03.020 '
oa: '1'
page: 109-114
publication: IFAC-PapersOnLine
publication_identifier:
issn:
- 2405-8963
publication_status: published
publisher: Elsevier BV
status: public
title: State-space modelling approach for control and observer design in property-controlled
reverse flow forming
type: journal_article
user_id: '82875'
volume: 59
year: '2025'
...
---
_id: '63347'
abstract:
- lang: eng
text: Friction-spinning is an incremental thermomechanical forming process
that has huge potential due to its simple yet effective mechanism of utilising
friction between a rotating workpiece and a forming tool to increase the workpiece’s
temperature, which reduces the required forces and increases formability during
the forming process. Despite the simplicity of the process’s setup, the thermomechanical
loads and high relative velocities involved, especially in the contact zone, make
the application of classical methods for characterising friction inaccurate. It
is therefore essential to find a way to describe the frictional behaviour under
real process conditions to be able to gain a holistic understanding of the process
and the effect of the adjustable parameters on the outcome, especially the temperature.
To achieve this goal, an experimental setup that considers the actual process
boundary conditions in forming tubes made of EN AW-6060 was used to measure in
situ normal and frictional forces, in addition to process temperatures, under
varying rotational speed and feed rate values.
article_number: '302'
author:
- first_name: Eugen
full_name: Wiens, Eugen
id: '7888'
last_name: Wiens
- first_name: Dina
full_name: Hijazi, Dina
last_name: Hijazi
- first_name: Maik
full_name: Jüttner, Maik
last_name: Jüttner
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Mark Dennis
full_name: Kensy, Mark Dennis
last_name: Kensy
- first_name: Wolfgang
full_name: Tillmann, Wolfgang
last_name: Tillmann
citation:
ama: Wiens E, Hijazi D, Jüttner M, Homberg W, Kensy MD, Tillmann W. In Situ Investigation
of the Frictional Behaviour in Friction-Spinning. Journal of Manufacturing
and Materials Processing. 2025;9(9). doi:10.3390/jmmp9090302
apa: Wiens, E., Hijazi, D., Jüttner, M., Homberg, W., Kensy, M. D., & Tillmann,
W. (2025). In Situ Investigation of the Frictional Behaviour in Friction-Spinning.
Journal of Manufacturing and Materials Processing, 9(9), Article
302. https://doi.org/10.3390/jmmp9090302
bibtex: '@article{Wiens_Hijazi_Jüttner_Homberg_Kensy_Tillmann_2025, title={In Situ
Investigation of the Frictional Behaviour in Friction-Spinning}, volume={9}, DOI={10.3390/jmmp9090302}, number={9302},
journal={Journal of Manufacturing and Materials Processing}, publisher={MDPI AG},
author={Wiens, Eugen and Hijazi, Dina and Jüttner, Maik and Homberg, Werner and
Kensy, Mark Dennis and Tillmann, Wolfgang}, year={2025} }'
chicago: Wiens, Eugen, Dina Hijazi, Maik Jüttner, Werner Homberg, Mark Dennis Kensy,
and Wolfgang Tillmann. “In Situ Investigation of the Frictional Behaviour in Friction-Spinning.”
Journal of Manufacturing and Materials Processing 9, no. 9 (2025). https://doi.org/10.3390/jmmp9090302.
ieee: 'E. Wiens, D. Hijazi, M. Jüttner, W. Homberg, M. D. Kensy, and W. Tillmann,
“In Situ Investigation of the Frictional Behaviour in Friction-Spinning,” Journal
of Manufacturing and Materials Processing, vol. 9, no. 9, Art. no. 302, 2025,
doi: 10.3390/jmmp9090302.'
mla: Wiens, Eugen, et al. “In Situ Investigation of the Frictional Behaviour in
Friction-Spinning.” Journal of Manufacturing and Materials Processing,
vol. 9, no. 9, 302, MDPI AG, 2025, doi:10.3390/jmmp9090302.
short: E. Wiens, D. Hijazi, M. Jüttner, W. Homberg, M.D. Kensy, W. Tillmann, Journal
of Manufacturing and Materials Processing 9 (2025).
date_created: 2025-12-19T10:05:03Z
date_updated: 2025-12-22T10:39:34Z
department:
- _id: '156'
doi: 10.3390/jmmp9090302
intvolume: ' 9'
issue: '9'
language:
- iso: eng
publication: Journal of Manufacturing and Materials Processing
publication_identifier:
issn:
- 2504-4494
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: In Situ Investigation of the Frictional Behaviour in Friction-Spinning
type: journal_article
user_id: '7888'
volume: 9
year: '2025'
...
---
_id: '59894'
abstract:
- lang: eng
text: 'Abstract. This study presents intrinsic lubrication as a novel approach
to deep drawing processes, using additively manufactured, lubricant-permeable
tools to minimize lubricant consumption and improve efficiency. Two systems were
evaluated: a passive system based on capillary action and gravity, and an active
system using pumped delivery for precise, on-demand application. Experimental
tests were conducted on micro-bores (0.2-0.5 mm) to demonstrate their suitability
for lubricant transport. Smaller bores have excellent capillary action but are
prone to clogging, while larger bores offer higher permeability. The passive system
is resource-efficient but requires adjustments to counteract gravitational asymmetry.
The active system provides consistent lubricant distribution but is more complex.
These findings provide a basis for optimizing intrinsic lubrication systems.'
author:
- first_name: Ermir
full_name: Cakici, Ermir
id: '79551'
last_name: Cakici
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
citation:
ama: 'Cakici E, Homberg W. Intrinsic lubrication: A new approach in the context
of the deep drawing process. In: Materials Research Proceedings. Vol 54.
Materials Research Forum LLC; 2025. doi:10.21741/9781644903599-122'
apa: 'Cakici, E., & Homberg, W. (2025). Intrinsic lubrication: A new approach
in the context of the deep drawing process. Materials Research Proceedings,
54. https://doi.org/10.21741/9781644903599-122'
bibtex: '@inproceedings{Cakici_Homberg_2025, title={Intrinsic lubrication: A new
approach in the context of the deep drawing process}, volume={54}, DOI={10.21741/9781644903599-122},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Cakici, Ermir and Homberg, Werner}, year={2025} }'
chicago: 'Cakici, Ermir, and Werner Homberg. “Intrinsic Lubrication: A New Approach
in the Context of the Deep Drawing Process.” In Materials Research Proceedings,
Vol. 54. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-122.'
ieee: 'E. Cakici and W. Homberg, “Intrinsic lubrication: A new approach in the context
of the deep drawing process,” in Materials Research Proceedings, Paestum,
Italien, 2025, vol. 54, doi: 10.21741/9781644903599-122.'
mla: 'Cakici, Ermir, and Werner Homberg. “Intrinsic Lubrication: A New Approach
in the Context of the Deep Drawing Process.” Materials Research Proceedings,
vol. 54, Materials Research Forum LLC, 2025, doi:10.21741/9781644903599-122.'
short: 'E. Cakici, W. Homberg, in: Materials Research Proceedings, Materials Research
Forum LLC, 2025.'
conference:
end_date: 2025-05-09
location: Paestum, Italien
name: The 28th International ESAFORM Conference on Material Forming - ESAFORM 2025
start_date: 2025-05-07
date_created: 2025-05-14T08:53:41Z
date_updated: 2026-04-16T08:33:32Z
department:
- _id: '156'
- _id: '321'
doi: 10.21741/9781644903599-122
intvolume: ' 54'
language:
- iso: eng
main_file_link:
- url: https://mrforum.com/product/9781644903599-122/
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: 'Intrinsic lubrication: A new approach in the context of the deep drawing process'
type: conference
user_id: '79551'
volume: 54
year: '2025'
...
---
_id: '53638'
abstract:
- lang: eng
text: Abstract. Spring steel wires are usually supplied and stored on coils.
The manufacturing and coiling processes of these wires induce inhomogeneous plastic
deformations that lead to undesirable residual stresses and varying wire curvatures
in the semi-finished product. These residual stresses and curvatures defects are
causing varying process conditions in the subsequent manufacturing processes,
which have a negative impact on the product quality, leading to wastage and thus
affecting the economic and ecological efficiency. Especially the curvature deviations
must be compensated for the stability of the subsequent processes. This is usually
realised with roller straighteners, which are set manually by the machine operators
only at the beginning of a process. In this paper, we introduce a new approach
with a modular straightening-machine design and a new set-up process. The more
isolated deformation behaviour in a module-based straightener overcomes the complexity
of interactions between the close-positioned spaced straightening rollers. This
is combined with a set-up process that is independent of conventional material
testing, modelling the actual and batch-specific behaviour of the wire in the
straightening process. The exact knowledge and time-consuming determination of
the material properties thus becomes obsolete. The experimental investigations
show the influence of defined straightening strategies on the residual stress
evolution and the residual forming limit of the spring steel wires (X10CrNi18-8)
in the new straightening process.
author:
- first_name: Frederik Simon
full_name: Dahms, Frederik Simon
id: '64977'
last_name: Dahms
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
citation:
ama: 'Dahms FS, Homberg W. Modular 3D roller straightening – A new approach to straightening
and forming of spring steel wires (X10CrNi18-8). In: Materials Research Proceedings.
Materials Research Forum LLC; 2024. doi:10.21741/9781644903131-154'
apa: Dahms, F. S., & Homberg, W. (2024). Modular 3D roller straightening – A
new approach to straightening and forming of spring steel wires (X10CrNi18-8).
Materials Research Proceedings. ESAFORM2024, Toulouse. https://doi.org/10.21741/9781644903131-154
bibtex: '@inproceedings{Dahms_Homberg_2024, title={Modular 3D roller straightening
– A new approach to straightening and forming of spring steel wires (X10CrNi18-8)},
DOI={10.21741/9781644903131-154},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Dahms, Frederik Simon and Homberg, Werner}, year={2024} }'
chicago: Dahms, Frederik Simon, and Werner Homberg. “Modular 3D Roller Straightening
– A New Approach to Straightening and Forming of Spring Steel Wires (X10CrNi18-8).”
In Materials Research Proceedings. Materials Research Forum LLC, 2024.
https://doi.org/10.21741/9781644903131-154.
ieee: 'F. S. Dahms and W. Homberg, “Modular 3D roller straightening – A new approach
to straightening and forming of spring steel wires (X10CrNi18-8),” presented at
the ESAFORM2024, Toulouse, 2024, doi: 10.21741/9781644903131-154.'
mla: Dahms, Frederik Simon, and Werner Homberg. “Modular 3D Roller Straightening
– A New Approach to Straightening and Forming of Spring Steel Wires (X10CrNi18-8).”
Materials Research Proceedings, Materials Research Forum LLC, 2024, doi:10.21741/9781644903131-154.
short: 'F.S. Dahms, W. Homberg, in: Materials Research Proceedings, Materials Research
Forum LLC, 2024.'
conference:
location: Toulouse
name: ESAFORM2024
date_created: 2024-04-25T08:29:20Z
date_updated: 2024-05-27T08:16:18Z
department:
- _id: '156'
doi: 10.21741/9781644903131-154
language:
- iso: eng
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: Modular 3D roller straightening – A new approach to straightening and forming
of spring steel wires (X10CrNi18-8)
type: conference
user_id: '64977'
year: '2024'
...
---
_id: '57190'
abstract:
- lang: eng
text: This paper deals with the modeling of a soft sensor for detecting α’-martensite
evolution from the micromagnetic signals that are measured during the reverse
flow forming of metastable AISI 304L austenitic steel. This model can be prospectively
used inside a closed-loop property-controlled flow forming process. To achieve
this, optimization by means of a non-linear regression of experimental data was
carried out. To collect the experimental data, specimens were produced by flow
forming seamless tubes at room temperature. Using a combination of production
parameters (like the infeed depth and feed rate), specimens with different α’-martensite
contents and wall-thickness reductions were produced. An equation to compute α’-martensite
from both specific production-process parameters and micromagnetic Barkhausen
noise (MBN) measurements was obtained using numerical methods. In this process,
the behavior of the quantity of interest (namely, the α’-martensite content) was
mathematically evaluated with respect to non-destructive MBN data and the feed
rate that was used to produce the components. A combination of exponential and
potential functions was defined as the ansatz functions of the model. The obtained
model was validated online and offline during the real flow forming of workpieces,
obtaining average deviations of up to 7% α’-martensite with respect to the model.
The implementation of the soft sensor model for property-controlled production
represents an important milestone for producing high-added-value components on
the basis of a well-understood process-microstructure-property relationship.
author:
- first_name: 'Julian '
full_name: 'Rozo Vasquez, Julian '
last_name: Rozo Vasquez
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: 'Rozo Vasquez J, Kersting L, Arian B, Homberg W, Trächtler A, Walther F. Soft
Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic
Steel AISI 304L. In: Lecture Notes in Mechanical Engineering. Springer
International Publishing; 2024. doi:10.1007/978-3-031-58006-2_10'
apa: Rozo Vasquez, J., Kersting, L., Arian, B., Homberg, W., Trächtler, A., &
Walther, F. (2024). Soft Sensor Model of Phase Transformation During Flow Forming
of Metastable Austenitic Steel AISI 304L. In Lecture Notes in Mechanical Engineering.
Springer International Publishing. https://doi.org/10.1007/978-3-031-58006-2_10
bibtex: '@inbook{Rozo Vasquez_Kersting_Arian_Homberg_Trächtler_Walther_2024, place={Cham},
title={Soft Sensor Model of Phase Transformation During Flow Forming of Metastable
Austenitic Steel AISI 304L}, DOI={10.1007/978-3-031-58006-2_10},
booktitle={Lecture Notes in Mechanical Engineering}, publisher={Springer International
Publishing}, author={Rozo Vasquez, Julian and Kersting, Lukas and Arian, Bahman
and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }'
chicago: 'Rozo Vasquez, Julian , Lukas Kersting, Bahman Arian, Werner Homberg, Ansgar
Trächtler, and Frank Walther. “Soft Sensor Model of Phase Transformation During
Flow Forming of Metastable Austenitic Steel AISI 304L.” In Lecture Notes in
Mechanical Engineering. Cham: Springer International Publishing, 2024. https://doi.org/10.1007/978-3-031-58006-2_10.'
ieee: 'J. Rozo Vasquez, L. Kersting, B. Arian, W. Homberg, A. Trächtler, and F.
Walther, “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable
Austenitic Steel AISI 304L,” in Lecture Notes in Mechanical Engineering,
Cham: Springer International Publishing, 2024.'
mla: Rozo Vasquez, Julian, et al. “Soft Sensor Model of Phase Transformation During
Flow Forming of Metastable Austenitic Steel AISI 304L.” Lecture Notes in Mechanical
Engineering, Springer International Publishing, 2024, doi:10.1007/978-3-031-58006-2_10.
short: 'J. Rozo Vasquez, L. Kersting, B. Arian, W. Homberg, A. Trächtler, F. Walther,
in: Lecture Notes in Mechanical Engineering, Springer International Publishing,
Cham, 2024.'
date_created: 2024-11-18T10:24:06Z
date_updated: 2024-11-18T10:39:03Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
doi: 10.1007/978-3-031-58006-2_10
language:
- iso: eng
place: Cham
publication: Lecture Notes in Mechanical Engineering
publication_identifier:
isbn:
- '9783031580055'
- '9783031580062'
issn:
- 2195-4356
- 2195-4364
publication_status: published
publisher: Springer International Publishing
quality_controlled: '1'
status: public
title: Soft Sensor Model of Phase Transformation During Flow Forming of Metastable
Austenitic Steel AISI 304L
type: book_chapter
user_id: '41470'
year: '2024'
...
---
_id: '57189'
abstract:
- lang: eng
text: "This paper deals with micromagnetic measurements for online detection of\r\nstrain-induced
α’-martensite during plastic deformation of metastable\r\naustenitic steel AISI
304L. The operating principles of the sensors are\r\nBarkhausen noise (MBN) and
eddy currents (EC), which are suitable for\r\ndetection of microstructure evolution
due to formation of ferromagnetic\r\nphases. Nevertheless, the description of
the calibration and\r\ntransformation models of the micromagnetic measurements
into\r\nquantitative α’-martensite fractions is beyond the scope of this paper.\r\nThe
focus will be put on the qualification of different micromagnetic\r\nmethods as
well as of different measurement systems under conditions\r\nsimilar to the real
ones during production, which is crucial for\r\nimplementation of a property-controlled
flow forming process. The\r\ninvestigation was carried out on tubular specimens
produced by flow\r\nforming, which have different content of α’-martensite. To
characterize\r\nthe sensitivity of the sensors, different contact conditions between\r\nsensors
and workpieces were reproduced. MBN sensors are suitable for\r\ndetecting amount
of α’-martensite, but the measurements are affected by\r\nthe surface roughness.
This entails that the calibration models for MBN\r\nsensors must take account
of these effects. EC sensors show a closer\r\nmatch with the amount of α’-martensite
without having major affectation\r\nby other effects."
author:
- first_name: 'Julian '
full_name: 'Rozo Vasquez, Julian '
last_name: Rozo Vasquez
- first_name: Hanigah
full_name: Kanagarajah, Hanigah
last_name: Kanagarajah
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: 'Rozo Vasquez J, Kanagarajah H, Arian B, et al. Barkhausen noise- and eddy
current-based measurements for online detection of deformation-induced martensite
during flow forming of metastable austenitic steel AISI 304L. In: Authorea, Inc.;
2024.'
apa: Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler,
A., & Walther, F. (2024). Barkhausen noise- and eddy current-based measurements
for online detection of deformation-induced martensite during flow forming of
metastable austenitic steel AISI 304L.
bibtex: '@inproceedings{Rozo Vasquez_Kanagarajah_Arian_Kersting_Homberg_Trächtler_Walther_2024,
title={Barkhausen noise- and eddy current-based measurements for online detection
of deformation-induced martensite during flow forming of metastable austenitic
steel AISI 304L}, publisher={Authorea, Inc.}, author={Rozo Vasquez, Julian and
Kanagarajah, Hanigah and Arian, Bahman and Kersting, Lukas and Homberg, Werner
and Trächtler, Ansgar and Walther, Frank}, year={2024} }'
chicago: Rozo Vasquez, Julian , Hanigah Kanagarajah, Bahman Arian, Lukas Kersting,
Werner Homberg, Ansgar Trächtler, and Frank Walther. “Barkhausen Noise- and Eddy
Current-Based Measurements for Online Detection of Deformation-Induced Martensite
during Flow Forming of Metastable Austenitic Steel AISI 304L.” Authorea, Inc.,
2024.
ieee: J. Rozo Vasquez et al., “Barkhausen noise- and eddy current-based measurements
for online detection of deformation-induced martensite during flow forming of
metastable austenitic steel AISI 304L,” 2024.
mla: Rozo Vasquez, Julian, et al. Barkhausen Noise- and Eddy Current-Based Measurements
for Online Detection of Deformation-Induced Martensite during Flow Forming of
Metastable Austenitic Steel AISI 304L. Authorea, Inc., 2024.
short: 'J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler,
F. Walther, in: Authorea, Inc., 2024.'
date_created: 2024-11-18T10:22:34Z
date_updated: 2024-11-18T10:39:19Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
language:
- iso: eng
publication_status: published
publisher: Authorea, Inc.
quality_controlled: '1'
status: public
title: Barkhausen noise- and eddy current-based measurements for online detection
of deformation-induced martensite during flow forming of metastable austenitic steel
AISI 304L
type: conference
user_id: '41470'
year: '2024'
...
---
_id: '57173'
abstract:
- lang: eng
text: Manufacturing processes benefit from property control enabling reproducibility,
application oriented outcomes, and efficient part production. In reverse flow
forming, state of the art practices focus primarily on geometry control, neglecting
property control. Given the intricacies of the process involving the interaction
of tool and machine behavior, process parameters, properties of semi finished
products and temperatures, incorporating process control becomes an imperative
for producing components with predefined properties. The property controlled within
this reverse flow forming process is the local α’ martensite content. Therefore,
process strategies to actively influence the α’ martensite content must be implemented.
In this study seamless AISI 304L steel tubes are used, where α’ martensite formation
is strain and/or temperature induced through phase transformation within the
process. This paper presents innovative process strategies, methods, and specially
developed mechanical and thermal actuator systems to locally increase or suppress
the α’ martensite content. The use and implementation of these approaches and
tools allows the creation of unique optically invisible microstructure profiles
containing 3D gradings, implying a radial grading of α’ martensite. The locally
implemented α’ martensite, forming these 3D gradings, offers potential applications
for functional or sensory purposes. This paper extends beyond theoretical concepts,
providing tangible component outcomes.
author:
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Julian
full_name: Rozo Vasquez, Julian
last_name: Rozo Vasquez
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: 'Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J, Walther F. α’-martensite
grading techniques in reverse flow forming of AISI 304L. In: Materials Research
Proceedings. Vol 44. Materials Research Forum LLC; 2024. doi:10.21741/9781644903254-76'
apa: Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., &
Walther, F. (2024). α’-martensite grading techniques in reverse flow forming of
AISI 304L. Materials Research Proceedings, 44. https://doi.org/10.21741/9781644903254-76
bibtex: '@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_Walther_2024,
title={α’-martensite grading techniques in reverse flow forming of AISI 304L},
volume={44}, DOI={10.21741/9781644903254-76},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Arian, Bahman and Homberg, Werner and Kersting, Lukas and Trächtler,
Ansgar and Rozo Vasquez, Julian and Walther, Frank}, year={2024} }'
chicago: Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian
Rozo Vasquez, and Frank Walther. “α’-Martensite Grading Techniques in Reverse
Flow Forming of AISI 304L.” In Materials Research Proceedings, Vol. 44.
Materials Research Forum LLC, 2024. https://doi.org/10.21741/9781644903254-76.
ieee: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, and F.
Walther, “α’-martensite grading techniques in reverse flow forming of AISI 304L,”
in Materials Research Proceedings, 2024, vol. 44, doi: 10.21741/9781644903254-76.'
mla: Arian, Bahman, et al. “α’-Martensite Grading Techniques in Reverse Flow Forming
of AISI 304L.” Materials Research Proceedings, vol. 44, Materials Research
Forum LLC, 2024, doi:10.21741/9781644903254-76.
short: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther,
in: Materials Research Proceedings, Materials Research Forum LLC, 2024.'
date_created: 2024-11-18T10:06:17Z
date_updated: 2024-11-18T10:42:55Z
department:
- _id: '241'
- _id: '153'
- _id: '156'
doi: 10.21741/9781644903254-76
intvolume: ' 44'
language:
- iso: eng
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: α’-martensite grading techniques in reverse flow forming of AISI 304L
type: conference
user_id: '41470'
volume: 44
year: '2024'
...
---
_id: '57178'
abstract:
- lang: eng
text: The incremental flow forming process is currently enhanced in research context
by special closed-loop property control concepts to increase the productivity
and to control the product properties making invisible property structures like
a magnetic barcode possible. However, it is preferred to establish property control
concepts on single roller machines instead of conventional machines with three
roller actuation due to the better machine accessibility. For those single roller
machines, rather poor surface qualities of flow formed workpieces were observed
in the past especially for hydraulic actuators. Thus, a new actuator closed-loop
position control concept is developed in this paper using model-based control
design methods and taking the flow forming forces as a load into account. The
novel closed-loop control is validated during workpiece production at the actual
single roller flow forming machine. An analysis of the manufactured workpieces
show that the surface quality is significantly enhanced by the new control to
a roughness level almost similar to conventional three roller flow forming. Thus,
a sincere added value to the flow forming process is offered by the novel actuator
closed-loop position control.
author:
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Sebastian
full_name: Sander, Sebastian
last_name: Sander
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Julian
full_name: Rozo Vasquez, Julian
last_name: Rozo Vasquez
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: 'Kersting L, Sander S, Arian B, et al. Improving the flow forming process by
a novel closed-loop control. In: Materials Research Proceedings. Vol 41.
Materials Research Forum LLC; 2024. doi:10.21741/9781644903131-158'
apa: Kersting, L., Sander, S., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg,
W., & Walther, F. (2024). Improving the flow forming process by a novel closed-loop
control. Materials Research Proceedings, 41. https://doi.org/10.21741/9781644903131-158
bibtex: '@inproceedings{Kersting_Sander_Arian_Rozo Vasquez_Trächtler_Homberg_Walther_2024,
title={Improving the flow forming process by a novel closed-loop control}, volume={41},
DOI={10.21741/9781644903131-158},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Kersting, Lukas and Sander, Sebastian and Arian, Bahman and Rozo
Vasquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank},
year={2024} }'
chicago: Kersting, Lukas, Sebastian Sander, Bahman Arian, Julian Rozo Vasquez, Ansgar
Trächtler, Werner Homberg, and Frank Walther. “Improving the Flow Forming Process
by a Novel Closed-Loop Control.” In Materials Research Proceedings, Vol.
41. Materials Research Forum LLC, 2024. https://doi.org/10.21741/9781644903131-158.
ieee: 'L. Kersting et al., “Improving the flow forming process by a novel
closed-loop control,” in Materials Research Proceedings, 2024, vol. 41,
doi: 10.21741/9781644903131-158.'
mla: Kersting, Lukas, et al. “Improving the Flow Forming Process by a Novel Closed-Loop
Control.” Materials Research Proceedings, vol. 41, Materials Research Forum
LLC, 2024, doi:10.21741/9781644903131-158.
short: 'L. Kersting, S. Sander, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg,
F. Walther, in: Materials Research Proceedings, Materials Research Forum LLC,
2024.'
date_created: 2024-11-18T10:11:24Z
date_updated: 2024-11-18T10:41:46Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
doi: 10.21741/9781644903131-158
intvolume: ' 41'
language:
- iso: eng
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: Improving the flow forming process by a novel closed-loop control
type: conference
user_id: '41470'
volume: 41
year: '2024'
...
---
_id: '57183'
abstract:
- lang: eng
text: In multi-stage bending and straightening operations cross-stage and quantity-dependent
effects crucially affect the quality of the end product. Using punch-bending units
in combination with a mechatronic straightening device can improve the accuracy
and repeatability of product features remarkably well. In this work a concept
for an innovative hybrid model of a roll straightener in a multi-stage straightening
and multi-stage bending process is proposed. This model combines data-driven elements
with expert knowledge and aims to minimise residual errors of the roll straightener
to reliably decrease the risk of disadvantageous cross-stage and quantity-dependent
effects on a subsequent punch-bending process.
author:
- first_name: Henning
full_name: Peters, Henning
last_name: Peters
- first_name: Eugen
full_name: Djakow, Eugen
id: '7904'
last_name: Djakow
- first_name: Tim
full_name: Rostek, Tim
id: '3469'
last_name: Rostek
- first_name: Andreas
full_name: Mazur, Andreas
last_name: Mazur
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Barbara
full_name: Hammer, Barbara
last_name: Hammer
citation:
ama: 'Peters H, Djakow E, Rostek T, et al. Novel approach for data-driven modelling
of multi-stage straightening and bending processes. In: Materials Research
Proceedings. Vol 41. Materials Research Forum LLC; 2024. doi:10.21741/9781644903131-252'
apa: Peters, H., Djakow, E., Rostek, T., Mazur, A., Trächtler, A., Homberg, W.,
& Hammer, B. (2024). Novel approach for data-driven modelling of multi-stage
straightening and bending processes. Materials Research Proceedings, 41.
https://doi.org/10.21741/9781644903131-252
bibtex: '@inproceedings{Peters_Djakow_Rostek_Mazur_Trächtler_Homberg_Hammer_2024,
title={Novel approach for data-driven modelling of multi-stage straightening and
bending processes}, volume={41}, DOI={10.21741/9781644903131-252},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Peters, Henning and Djakow, Eugen and Rostek, Tim and Mazur, Andreas
and Trächtler, Ansgar and Homberg, Werner and Hammer, Barbara}, year={2024} }'
chicago: Peters, Henning, Eugen Djakow, Tim Rostek, Andreas Mazur, Ansgar Trächtler,
Werner Homberg, and Barbara Hammer. “Novel Approach for Data-Driven Modelling
of Multi-Stage Straightening and Bending Processes.” In Materials Research
Proceedings, Vol. 41. Materials Research Forum LLC, 2024. https://doi.org/10.21741/9781644903131-252.
ieee: 'H. Peters et al., “Novel approach for data-driven modelling of multi-stage
straightening and bending processes,” in Materials Research Proceedings,
2024, vol. 41, doi: 10.21741/9781644903131-252.'
mla: Peters, Henning, et al. “Novel Approach for Data-Driven Modelling of Multi-Stage
Straightening and Bending Processes.” Materials Research Proceedings, vol.
41, Materials Research Forum LLC, 2024, doi:10.21741/9781644903131-252.
short: 'H. Peters, E. Djakow, T. Rostek, A. Mazur, A. Trächtler, W. Homberg, B.
Hammer, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.'
date_created: 2024-11-18T10:15:37Z
date_updated: 2024-11-18T10:40:50Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
doi: 10.21741/9781644903131-252
intvolume: ' 41'
language:
- iso: eng
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: Novel approach for data-driven modelling of multi-stage straightening and bending
processes
type: conference
user_id: '41470'
volume: 41
year: '2024'
...
---
_id: '57171'
abstract:
- lang: eng
text: In manufacturing, property control ensures efficient part production. However,
in reverse flow forming, current practices focus on geometry control rather than
property control. To address the complexity of the process and tool machine interaction,
process control is crucial for defined component properties. This study focuses
on controlling local α’ martensite content in reverse flow forming of seamless
AISI 304L steel tubes. Strategies and systems are presented to influence α’ martensite
content, creating unique microstructure profiles for 1D and 2D Gradings, with
tangible component outcomes.
author:
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Julian
full_name: Rozo Vasquez, Julian
last_name: Rozo Vasquez
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: 'Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J, Walther F. Thermomechanical
reverse flow forming of AISI 304L. In: Materials Research Proceedings.
Vol 41. Materials Research Forum LLC; 2024. doi:10.21741/9781644903131-151'
apa: Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., &
Walther, F. (2024). Thermomechanical reverse flow forming of AISI 304L. Materials
Research Proceedings, 41. https://doi.org/10.21741/9781644903131-151
bibtex: '@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_Walther_2024,
title={Thermomechanical reverse flow forming of AISI 304L}, volume={41}, DOI={10.21741/9781644903131-151},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Arian, Bahman and Homberg, Werner and Kersting, Lukas and Trächtler,
Ansgar and Rozo Vasquez, Julian and Walther, Frank}, year={2024} }'
chicago: Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian
Rozo Vasquez, and Frank Walther. “Thermomechanical Reverse Flow Forming of AISI
304L.” In Materials Research Proceedings, Vol. 41. Materials Research Forum
LLC, 2024. https://doi.org/10.21741/9781644903131-151.
ieee: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, and F.
Walther, “Thermomechanical reverse flow forming of AISI 304L,” in Materials
Research Proceedings, 2024, vol. 41, doi: 10.21741/9781644903131-151.'
mla: Arian, Bahman, et al. “Thermomechanical Reverse Flow Forming of AISI 304L.”
Materials Research Proceedings, vol. 41, Materials Research Forum LLC,
2024, doi:10.21741/9781644903131-151.
short: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther,
in: Materials Research Proceedings, Materials Research Forum LLC, 2024.'
date_created: 2024-11-18T10:02:38Z
date_updated: 2024-11-18T10:42:49Z
department:
- _id: '241'
- _id: '153'
- _id: '156'
doi: 10.21741/9781644903131-151
intvolume: ' 41'
language:
- iso: eng
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: Thermomechanical reverse flow forming of AISI 304L
type: conference
user_id: '41470'
volume: 41
year: '2024'
...
---
_id: '54650'
abstract:
- lang: eng
text: Abstract. Reducing the weight of vehicles can significantly lower
the energy or fuel consumed and thus the emissions during operation. One possibility
to assess this is the use of a property adapted multi-material systems containing
high strength steel, light metals like aluminium or magnesium and fibre reinforced
plastics. While expanding the number of materials used new challenges arise for
the production and furthermore the joining technology to manufacture the vehicle
made of the multi-material systems. One approach to overcome these challenges
is to use innovative and adaptable joining techniques which allows the manufacturing
of joints of different material combinations. Extensive research activities on
the two stage thermo-mechanical joining process with adaptable joining elements
was able to demonstrate the great potentials in terms of joining dissimilar materials
with good strength. The previously kinematic and path-based fabrication of auxiliary
joining elements is modified in this publication to a form-based approach with
a perspective of establishing an efficient process chain using easily and cheaply
available rods. Based on the new approach to produce the auxiliary joining elements,
it can be demonstrated that a reproducible production of the geometry is possible
for the investigated steel as well as aluminium material.
author:
- first_name: Thomas
full_name: Borgert, Thomas
id: '83141'
last_name: Borgert
- first_name: Ansgar Bernhard
full_name: Nordieker, Ansgar Bernhard
id: '88725'
last_name: Nordieker
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
citation:
ama: 'Borgert T, Nordieker AB, Homberg W. Form-based manufacturing of aluminium
and steel auxiliary joining elements as the basis for an efficient joining operation.
In: Materials Research Proceedings. Materials Research Forum LLC; 2024.
doi:10.21741/9781644903131-180'
apa: Borgert, T., Nordieker, A. B., & Homberg, W. (2024). Form-based manufacturing
of aluminium and steel auxiliary joining elements as the basis for an efficient
joining operation. Materials Research Proceedings. ESAFORM 2024, Toulouse.
https://doi.org/10.21741/9781644903131-180
bibtex: '@inproceedings{Borgert_Nordieker_Homberg_2024, title={Form-based manufacturing
of aluminium and steel auxiliary joining elements as the basis for an efficient
joining operation}, DOI={10.21741/9781644903131-180},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Borgert, Thomas and Nordieker, Ansgar Bernhard and Homberg, Werner},
year={2024} }'
chicago: Borgert, Thomas, Ansgar Bernhard Nordieker, and Werner Homberg. “Form-Based
Manufacturing of Aluminium and Steel Auxiliary Joining Elements as the Basis for
an Efficient Joining Operation.” In Materials Research Proceedings. Materials
Research Forum LLC, 2024. https://doi.org/10.21741/9781644903131-180.
ieee: 'T. Borgert, A. B. Nordieker, and W. Homberg, “Form-based manufacturing of
aluminium and steel auxiliary joining elements as the basis for an efficient joining
operation,” presented at the ESAFORM 2024, Toulouse, 2024, doi: 10.21741/9781644903131-180.'
mla: Borgert, Thomas, et al. “Form-Based Manufacturing of Aluminium and Steel Auxiliary
Joining Elements as the Basis for an Efficient Joining Operation.” Materials
Research Proceedings, Materials Research Forum LLC, 2024, doi:10.21741/9781644903131-180.
short: 'T. Borgert, A.B. Nordieker, W. Homberg, in: Materials Research Proceedings,
Materials Research Forum LLC, 2024.'
conference:
location: Toulouse
name: ESAFORM 2024
date_created: 2024-06-07T09:38:45Z
date_updated: 2025-09-22T05:45:37Z
department:
- _id: '156'
doi: 10.21741/9781644903131-180
language:
- iso: eng
project:
- _id: '133'
name: TRR 285 - Project Area C
- _id: '147'
name: TRR 285 - Subproject C03
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
status: public
title: Form-based manufacturing of aluminium and steel auxiliary joining elements
as the basis for an efficient joining operation
type: conference
user_id: '88725'
year: '2024'
...
---
_id: '54649'
article_number: '100185'
author:
- first_name: Thomas
full_name: Borgert, Thomas
id: '83141'
last_name: Borgert
- first_name: Ansgar Bernhard
full_name: Nordieker, Ansgar Bernhard
id: '88725'
last_name: Nordieker
- first_name: Eugen
full_name: Wiens, Eugen
id: '7888'
last_name: Wiens
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
citation:
ama: Borgert T, Nordieker AB, Wiens E, Homberg W. Investigations to improve the
tool life during thermomechanical and incremental forming of steel auxiliary joining
elements. Journal of Advanced Joining Processes. 2024;9. doi:10.1016/j.jajp.2024.100185
apa: Borgert, T., Nordieker, A. B., Wiens, E., & Homberg, W. (2024). Investigations
to improve the tool life during thermomechanical and incremental forming of steel
auxiliary joining elements. Journal of Advanced Joining Processes, 9,
Article 100185. https://doi.org/10.1016/j.jajp.2024.100185
bibtex: '@article{Borgert_Nordieker_Wiens_Homberg_2024, title={Investigations to
improve the tool life during thermomechanical and incremental forming of steel
auxiliary joining elements}, volume={9}, DOI={10.1016/j.jajp.2024.100185},
number={100185}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier
BV}, author={Borgert, Thomas and Nordieker, Ansgar Bernhard and Wiens, Eugen and
Homberg, Werner}, year={2024} }'
chicago: Borgert, Thomas, Ansgar Bernhard Nordieker, Eugen Wiens, and Werner Homberg.
“Investigations to Improve the Tool Life during Thermomechanical and Incremental
Forming of Steel Auxiliary Joining Elements.” Journal of Advanced Joining Processes
9 (2024). https://doi.org/10.1016/j.jajp.2024.100185.
ieee: 'T. Borgert, A. B. Nordieker, E. Wiens, and W. Homberg, “Investigations to
improve the tool life during thermomechanical and incremental forming of steel
auxiliary joining elements,” Journal of Advanced Joining Processes, vol.
9, Art. no. 100185, 2024, doi: 10.1016/j.jajp.2024.100185.'
mla: Borgert, Thomas, et al. “Investigations to Improve the Tool Life during Thermomechanical
and Incremental Forming of Steel Auxiliary Joining Elements.” Journal of Advanced
Joining Processes, vol. 9, 100185, Elsevier BV, 2024, doi:10.1016/j.jajp.2024.100185.
short: T. Borgert, A.B. Nordieker, E. Wiens, W. Homberg, Journal of Advanced Joining
Processes 9 (2024).
date_created: 2024-06-07T09:31:59Z
date_updated: 2025-09-22T05:44:28Z
department:
- _id: '156'
doi: 10.1016/j.jajp.2024.100185
intvolume: ' 9'
language:
- iso: eng
project:
- _id: '133'
name: TRR 285 - Project Area C
- _id: '147'
name: TRR 285 - Subproject C03
publication: Journal of Advanced Joining Processes
publication_identifier:
issn:
- 2666-3309
publication_status: published
publisher: Elsevier BV
status: public
title: Investigations to improve the tool life during thermomechanical and incremental
forming of steel auxiliary joining elements
type: journal_article
user_id: '88725'
volume: 9
year: '2024'
...
---
_id: '62025'
abstract:
- lang: eng
text: ABSTRACTThis paper deals with micromagnetic
measurements for online detection of strain‐induced α′‐martensite during plastic
deformation of metastable austenitic steel AISI 304L. The operating principles
of the sensors are magnetic Barkhausen noise (MBN) and eddy currents (EC), which
are suitable for detection of microstructure evolution due to formation of ferromagnetic
phases. The focus of this study was put on the qualification of different micromagnetic
techniques and different measurement systems under conditions similar to the real
ones during production, which is crucial for implementation of a property‐controlled
flow forming process. The investigation was carried out on tubular specimens produced
by flow forming, which have different content of α′‐martensite. To characterize
the sensitivity of the sensors, different contact conditions between sensors and
workpieces were reproduced. MBN sensors are suitable for detecting amount of α′‐martensite,
but the measurements are affected by the surface roughness. This entails that
the calibration models for MBN sensors must take account of these effects. EC
sensors show a closer match with the amount of α′‐martensite without having major
affectation by other effects.
article_number: e13070
author:
- first_name: Julian
full_name: Rozo Vasquez, Julian
last_name: Rozo Vasquez
- first_name: Hanigah
full_name: Kanagarajah, Hanigah
last_name: Kanagarajah
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: Rozo Vasquez J, Kanagarajah H, Arian B, et al. Barkhausen Noise‐ and Eddy Current‐Based
Measurements for Online Detection of Deformation‐Induced Martensite During Flow
Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>. Engineering
Reports. 2024;7(1). doi:10.1002/eng2.13070
apa: Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler,
A., & Walther, F. (2024). Barkhausen Noise‐ and Eddy Current‐Based Measurements
for Online Detection of Deformation‐Induced Martensite During Flow Forming of
Metastable Austenitic Steel <scp>AISI 304L</scp>. Engineering
Reports, 7(1), Article e13070. https://doi.org/10.1002/eng2.13070
bibtex: '@article{Rozo Vasquez_Kanagarajah_Arian_Kersting_Homberg_Trächtler_Walther_2024,
title={Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection
of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic
Steel <scp>AISI 304L</scp>}, volume={7}, DOI={10.1002/eng2.13070},
number={1e13070}, journal={Engineering Reports}, publisher={Wiley}, author={Rozo
Vasquez, Julian and Kanagarajah, Hanigah and Arian, Bahman and Kersting, Lukas
and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }'
chicago: Rozo Vasquez, Julian, Hanigah Kanagarajah, Bahman Arian, Lukas Kersting,
Werner Homberg, Ansgar Trächtler, and Frank Walther. “Barkhausen Noise‐ and Eddy
Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite
During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</Scp>.”
Engineering Reports 7, no. 1 (2024). https://doi.org/10.1002/eng2.13070.
ieee: 'J. Rozo Vasquez et al., “Barkhausen Noise‐ and Eddy Current‐Based
Measurements for Online Detection of Deformation‐Induced Martensite During Flow
Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>,”
Engineering Reports, vol. 7, no. 1, Art. no. e13070, 2024, doi: 10.1002/eng2.13070.'
mla: Rozo Vasquez, Julian, et al. “Barkhausen Noise‐ and Eddy Current‐Based Measurements
for Online Detection of Deformation‐Induced Martensite During Flow Forming of
Metastable Austenitic Steel <scp>AISI 304L</Scp>.” Engineering
Reports, vol. 7, no. 1, e13070, Wiley, 2024, doi:10.1002/eng2.13070.
short: J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler,
F. Walther, Engineering Reports 7 (2024).
date_created: 2025-10-30T12:25:57Z
date_updated: 2025-10-30T12:54:40Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
doi: 10.1002/eng2.13070
intvolume: ' 7'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1002/eng2.13070
oa: '1'
publication: Engineering Reports
publication_identifier:
issn:
- 2577-8196
- 2577-8196
publication_status: published
publisher: Wiley
status: public
title: Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection
of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel
AISI 304L
type: journal_article
user_id: '82875'
volume: 7
year: '2024'
...
---
_id: '62053'
abstract:
- lang: eng
text: ABSTRACTThis paper deals with micromagnetic
measurements for online detection of strain‐induced α′‐martensite during plastic
deformation of metastable austenitic steel AISI 304L. The operating principles
of the sensors are magnetic Barkhausen noise (MBN) and eddy currents (EC), which
are suitable for detection of microstructure evolution due to formation of ferromagnetic
phases. The focus of this study was put on the qualification of different micromagnetic
techniques and different measurement systems under conditions similar to the real
ones during production, which is crucial for implementation of a property‐controlled
flow forming process. The investigation was carried out on tubular specimens produced
by flow forming, which have different content of α′‐martensite. To characterize
the sensitivity of the sensors, different contact conditions between sensors and
workpieces were reproduced. MBN sensors are suitable for detecting amount of α′‐martensite,
but the measurements are affected by the surface roughness. This entails that
the calibration models for MBN sensors must take account of these effects. EC
sensors show a closer match with the amount of α′‐martensite without having major
affectation by other effects.
article_number: e13070
author:
- first_name: Julian
full_name: Rozo Vasquez, Julian
last_name: Rozo Vasquez
- first_name: Hanigah
full_name: Kanagarajah, Hanigah
last_name: Kanagarajah
- first_name: Bahman
full_name: Arian, Bahman
id: '36287'
last_name: Arian
- first_name: Lukas
full_name: Kersting, Lukas
last_name: Kersting
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: Rozo Vasquez J, Kanagarajah H, Arian B, et al. Barkhausen Noise‐ and Eddy Current‐Based
Measurements for Online Detection of Deformation‐Induced Martensite During Flow
Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>. Engineering
Reports. 2024;7(1). doi:10.1002/eng2.13070
apa: Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler,
A., & Walther, F. (2024). Barkhausen Noise‐ and Eddy Current‐Based Measurements
for Online Detection of Deformation‐Induced Martensite During Flow Forming of
Metastable Austenitic Steel <scp>AISI 304L</scp>. Engineering
Reports, 7(1), Article e13070. https://doi.org/10.1002/eng2.13070
bibtex: '@article{Rozo Vasquez_Kanagarajah_Arian_Kersting_Homberg_Trächtler_Walther_2024,
title={Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection
of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic
Steel <scp>AISI 304L</scp>}, volume={7}, DOI={10.1002/eng2.13070},
number={1e13070}, journal={Engineering Reports}, publisher={Wiley}, author={Rozo
Vasquez, Julian and Kanagarajah, Hanigah and Arian, Bahman and Kersting, Lukas
and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }'
chicago: Rozo Vasquez, Julian, Hanigah Kanagarajah, Bahman Arian, Lukas Kersting,
Werner Homberg, Ansgar Trächtler, and Frank Walther. “Barkhausen Noise‐ and Eddy
Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite
During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</Scp>.”
Engineering Reports 7, no. 1 (2024). https://doi.org/10.1002/eng2.13070.
ieee: 'J. Rozo Vasquez et al., “Barkhausen Noise‐ and Eddy Current‐Based
Measurements for Online Detection of Deformation‐Induced Martensite During Flow
Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>,”
Engineering Reports, vol. 7, no. 1, Art. no. e13070, 2024, doi: 10.1002/eng2.13070.'
mla: Rozo Vasquez, Julian, et al. “Barkhausen Noise‐ and Eddy Current‐Based Measurements
for Online Detection of Deformation‐Induced Martensite During Flow Forming of
Metastable Austenitic Steel <scp>AISI 304L</Scp>.” Engineering
Reports, vol. 7, no. 1, e13070, Wiley, 2024, doi:10.1002/eng2.13070.
short: J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler,
F. Walther, Engineering Reports 7 (2024).
date_created: 2025-11-03T10:28:12Z
date_updated: 2025-11-03T10:29:18Z
department:
- _id: '153'
- _id: '241'
- _id: '156'
doi: 10.1002/eng2.13070
intvolume: ' 7'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1002/eng2.13070
oa: '1'
publication: Engineering Reports
publication_identifier:
issn:
- 2577-8196
- 2577-8196
publication_status: published
publisher: Wiley
status: public
title: Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection
of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel
AISI 304L
type: journal_article
user_id: '82875'
volume: 7
year: '2024'
...
---
_id: '63346'
abstract:
- lang: eng
text: Lightweight design by using low-density and load-adapted materials
can reduce the weight of vehicles and the emissions generated during operation.
However, the usage of different materials requires innovative joining technologies
with increased versatility. In this investigation, the focus is on describing
and characterising the failure behaviour of connections manufactured by an innovative
thermomechanical joining process with adaptable auxiliary joining elements in
single-lap tensile-shear tests. In order to analyse the failure development in
detail, the specimens are investigated using in-situ computed tomography (in-situ
CT). Here, the tensile-shear test is interrupted at points of interest and CT
scans are conducted under load. In addition, the interrupted in-situ testing procedure
is validated by comparing the loading behaviour with conventional continuous tensile-shear
tests. The results of the in-situ investigations of joints with varying material
combinations clearly describe the cause of failure, allowing conclusions towards
an improved joint design.
author:
- first_name: Thomas
full_name: Borgert, Thomas
id: '83141'
last_name: Borgert
- first_name: D
full_name: Köhler, D
last_name: Köhler
- first_name: Eugen
full_name: Wiens, Eugen
id: '7888'
last_name: Wiens
- first_name: R
full_name: Kupfer, R
last_name: Kupfer
- first_name: J
full_name: Troschitz, J
last_name: Troschitz
- first_name: Werner
full_name: Homberg, Werner
id: '233'
last_name: Homberg
- first_name: M
full_name: Gude, M
last_name: Gude
citation:
ama: 'Borgert T, Köhler D, Wiens E, et al. In-situ computed tomography analysis
of the failure mechanisms of thermomechanically manufactured joints with auxiliary
joining element. Proceedings of the Institution of Mechanical Engineers, Part
L: Journal of Materials: Design and Applications. 2024;238(12):2299-2306.
doi:10.1177/14644207241232233'
apa: 'Borgert, T., Köhler, D., Wiens, E., Kupfer, R., Troschitz, J., Homberg, W.,
& Gude, M. (2024). In-situ computed tomography analysis of the failure mechanisms
of thermomechanically manufactured joints with auxiliary joining element. Proceedings
of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design
and Applications, 238(12), 2299–2306. https://doi.org/10.1177/14644207241232233'
bibtex: '@article{Borgert_Köhler_Wiens_Kupfer_Troschitz_Homberg_Gude_2024, title={In-situ
computed tomography analysis of the failure mechanisms of thermomechanically manufactured
joints with auxiliary joining element}, volume={238}, DOI={10.1177/14644207241232233},
number={12}, journal={Proceedings of the Institution of Mechanical Engineers,
Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications},
author={Borgert, Thomas and Köhler, D and Wiens, Eugen and Kupfer, R and Troschitz,
J and Homberg, Werner and Gude, M}, year={2024}, pages={2299–2306} }'
chicago: 'Borgert, Thomas, D Köhler, Eugen Wiens, R Kupfer, J Troschitz, Werner
Homberg, and M Gude. “In-Situ Computed Tomography Analysis of the Failure Mechanisms
of Thermomechanically Manufactured Joints with Auxiliary Joining Element.” Proceedings
of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design
and Applications 238, no. 12 (2024): 2299–2306. https://doi.org/10.1177/14644207241232233.'
ieee: 'T. Borgert et al., “In-situ computed tomography analysis of the failure
mechanisms of thermomechanically manufactured joints with auxiliary joining element,”
Proceedings of the Institution of Mechanical Engineers, Part L: Journal of
Materials: Design and Applications, vol. 238, no. 12, pp. 2299–2306, 2024,
doi: 10.1177/14644207241232233.'
mla: 'Borgert, Thomas, et al. “In-Situ Computed Tomography Analysis of the Failure
Mechanisms of Thermomechanically Manufactured Joints with Auxiliary Joining Element.”
Proceedings of the Institution of Mechanical Engineers, Part L: Journal of
Materials: Design and Applications, vol. 238, no. 12, SAGE Publications, 2024,
pp. 2299–306, doi:10.1177/14644207241232233.'
short: 'T. Borgert, D. Köhler, E. Wiens, R. Kupfer, J. Troschitz, W. Homberg, M.
Gude, Proceedings of the Institution of Mechanical Engineers, Part L: Journal
of Materials: Design and Applications 238 (2024) 2299–2306.'
date_created: 2025-12-19T09:13:30Z
date_updated: 2025-12-22T10:40:28Z
department:
- _id: '156'
doi: 10.1177/14644207241232233
intvolume: ' 238'
issue: '12'
language:
- iso: eng
page: 2299-2306
publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal
of Materials: Design and Applications'
publication_identifier:
issn:
- 1464-4207
- 2041-3076
publication_status: published
publisher: SAGE Publications
quality_controlled: '1'
status: public
title: In-situ computed tomography analysis of the failure mechanisms of thermomechanically
manufactured joints with auxiliary joining element
type: journal_article
user_id: '7888'
volume: 238
year: '2024'
...