@article{30713,
  author       = {{Rostek, Tim and Wiens, Eugen and Homberg, Werner}},
  journal      = {{Procedia Manufacturing}},
  pages        = {{395--399}},
  publisher    = {{ Elsevier Ltd}},
  title        = {{{Joining with Versatile Friction-Spun Joint Connectors}}},
  doi          = {{10.1016/j.promfg.2020.04.313}},
  volume       = {{47}},
  year         = {{2020}},
}

@inproceedings{21447,
  abstract     = {{Even though the spectrum of parts is expected to shift over the long term as a result of increasing e-mobility, there is still an extremely high demand for complex components made of high-strength materials which can only be produced by hydroforming technologies. The innovative combination of hydroforming processes with other forming processes, as well as the improvement of the processes themselves, offers considerable potential for improvement. 
A number of promising ways of improving the hydroforming process chain are therefore the subject of this contribution. The focus of the article is on possible approaches for combining (incremental) pre- and post-forming operations, which can permit considerable improvements in both quality and features at a reduced cost. Furthermore, a novel combination of quasi-static and high-speed forming processes is presented, leading to an improved overall forming process (with a high application potential) for the production of complex parts. 
}},
  author       = {{Wiens, Eugen and Djakow, Eugen and Homberg, Werner}},
  booktitle    = {{Nebu/Nehy 2020}},
  keywords     = {{Hydroforming, Incremental Forming, Internal Flow-turning, High-speed Forming}},
  title        = {{{Some ideas for the further development of hydroforming process chains}}},
  year         = {{2020}},
}

@inproceedings{21451,
  author       = {{Rostek, Tim and Homberg, Werner}},
  booktitle    = {{AIP Conference Proceedings 2113, 170018}},
  number       = {{1}},
  publisher    = {{AIP Publishing}},
  title        = {{{Improved set up strategies for steel strip straightening machines}}},
  doi          = {{10.1063/1.5112734}},
  volume       = {{2113}},
  year         = {{2019}},
}

@inproceedings{15068,
  author       = {{Wiens, Eugen and Homberg, Werner}},
  booktitle    = {{PROCEEDINGS OF THE 22ND INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2019}},
  title        = {{{Forming analysis of tailored tubes with an internal contoured wall thickness and external axial ribs manufactured by internal flow-turning}}},
  doi          = {{10.1063/1.5112535}},
  year         = {{2019}},
}

@inproceedings{21457,
  abstract     = {{<jats:p>This paper presents the finite element model developed for the simulation of pipe elbow production by the so-called ‘Hamburg process’ in order to improve productivity and resource efficiency. To optimize the tooling design, a sensitivity analysis of the tool parameters that influence the quality of pipe elbows, such as mandrel height and length, is conducted. Different materials data sets including damage models were considered. Using numerical simulations, it is possible to determine an optimized tool geometry for the production of specific pipe elbow dimensions. Furthermore, as a result of the experiments and numerical simulations conducted, it is possible to increase the production velocity of the serial plant. Along with deformation, damage models are included in simulations in order to identify the right process boundaries. Finally, an experimentally validated model is developed for increasing resource efficiency in pipe elbow fabrication.</jats:p>}},
  author       = {{Diekmann, Uwe and Homberg, Werner and Prehm, Jens and Rostek, Tim and Schönhoff, Nils and Tabakajew, Dmitri and Trasca, Andreea and Uysal, Haris}},
  booktitle    = {{Materials Science Forum}},
  issn         = {{1662-9752}},
  pages        = {{159--164}},
  publisher    = {{Trans Tech Publications Ltd}},
  title        = {{{Optimization of Tooling Design for Hot Mandrel Bending of Pipe Elbows}}},
  doi          = {{10.4028/www.scientific.net/msf.918.159}},
  volume       = {{918}},
  year         = {{2018}},
}

@inproceedings{21458,
  author       = {{Rostek, Tim and Homberg, Werner}},
  booktitle    = {{AIP Conference Proceedings 1960, 100013}},
  number       = {{1}},
  publisher    = {{AIP Publishing}},
  title        = {{{Grading Technologies for the Tanufacture of Innovative Cutting Blades}}},
  doi          = {{10.1063/1.5034953}},
  volume       = {{1960}},
  year         = {{2018}},
}

@inproceedings{21465,
  author       = {{Homberg, Werner and Rostek, Tim and Schaper, Mirko and Grydin, Olexandr and Andreiev, Anatolii and Brosius, Alexander and Guilleaume, Christina}},
  issn         = {{2366-4061}},
  pages        = {{28--33}},
  publisher    = {{Universität Paderborn}},
  title        = {{{Hybride Verbundstrukturen aus Aluminium und Titan für Leichtbauanwendungen}}},
  year         = {{2018}},
}

@techreport{30257,
  author       = {{Wiens, Eugen and Homberg, Werner}},
  isbn         = {{978-3-946885-25-2}},
  title        = {{{Herstellung innovativer Stahlhalbzeuge mit wanddicke- und festigkeitsveränderlichen Eigenschaften für den Leichtbau durch Innendrückwalzen (IDW)}}},
  volume       = {{P 948}},
  year         = {{2018}},
}

@article{15067,
  author       = {{Wiens, Eugen and Homberg, Werner}},
  issn         = {{2261-236X}},
  journal      = {{MATEC Web of Conferences}},
  location     = {{Bremen}},
  title        = {{{Internal Flow-Turning – extended manufacturing possibilities in tailored tube production}}},
  doi          = {{10.1051/matecconf/201819011002}},
  year         = {{2018}},
}

@article{21449,
  author       = {{Rostek, Tim and Homberg, Werner}},
  issn         = {{1877-7058}},
  journal      = {{Procedia Engineering}},
  location     = {{Cambridge}},
  pages        = {{2185--2190}},
  publisher    = {{Elsevier Ltd}},
  title        = {{{Locally Graded Steel Materials for Self-Sharpening Cutting Blades}}},
  doi          = {{10.1016/j.proeng.2017.10.979}},
  volume       = {{207}},
  year         = {{2017}},
}

@inproceedings{21452,
  author       = {{Homberg, Werner and Rostek, Tim and Schaper, Mirko and Grydin, Olexandr and Andreiev, Anatolii and Brosius, Alexander and Tulke, Marc}},
  number       = {{1}},
  publisher    = {{AIP Publishing}},
  title        = {{{Development of hybrid directionally reinforced structural parts for lightweight applications}}},
  doi          = {{10.1063/1.5008055}},
  volume       = {{1896}},
  year         = {{2017}},
}

@inproceedings{21453,
  author       = {{Rostek, Tim and Homberg, Werner}},
  editor       = {{Allwood, J.}},
  issn         = {{1877-7058}},
  pages        = {{2185--2190}},
  publisher    = {{Elsevier Ltd}},
  title        = {{{Locally Graded Steel Materials for Self-Sharpening Cutting Blades}}},
  doi          = {{10.1016/j.proeng.2017.10.979}},
  volume       = {{207}},
  year         = {{2017}},
}

@article{30259,
  author       = {{Wiens, Eugen and Homberg, Werner}},
  issn         = {{1877-7058}},
  journal      = {{Procedia Engineering}},
  keywords     = {{Applied Mathematics}},
  pages        = {{1755--1760}},
  publisher    = {{Elsevier BV}},
  title        = {{{Internal Flow-Turning – a new approach for the manufacture of tailored tubes with a constant external diameter}}},
  doi          = {{10.1016/j.proeng.2017.10.934}},
  volume       = {{207}},
  year         = {{2017}},
}

@inproceedings{30261,
  author       = {{Wiens, Eugen and Homberg, Werner}},
  booktitle    = {{Proceedings of the International Conference on Steels in Cars and Trucks SCT 2017}},
  location     = {{Amsterdam}},
  title        = {{{Internal flow-turning – efficient manufacture of load-adapted tubes with a constant external diameter}}},
  year         = {{2017}},
}

@article{21466,
  author       = {{Rostek, Tim and Homberg, Werner}},
  journal      = {{International Journal of Material Forming}},
  title        = {{{Layered Steel Materials for the Manufacture of Self-Sharpening Cutting Blades}}},
  year         = {{2016}},
}

@inproceedings{21467,
  author       = {{Homberg, Werner and Rostek, Tim}},
  title        = {{{Innovative Processing Techniques for the Manufacture of High-Performance Active Elements from Ultra High-Strength Steel Plate}}},
  year         = {{2015}},
}

@inproceedings{21454,
  abstract     = {{<jats:p>In order to optimise the material utilisation and improve the lightweight design of automotive parts tailored hollow profiles are needed, especially as semi-finished parts for hydroforming. Internal Flow-Turning is an innovative incremental forming technology which enables the manufacture of tubes featuring a varying wall thickness and a constant outer diameter. These characteristics facilitate the material feed at hydroforming processes significantly. In addition, the spinning-related forming technology improves the mechanical material properties, shape and dimensional accuracy, and the surface quality of parts produced.</jats:p>}},
  author       = {{Homberg, Werner and Rostek, Tim and Wiens, Eugen}},
  booktitle    = {{Key Engineering Materials}},
  editor       = {{Merklein, M. and Duflou, J. R. and Leacock, A. G. and Micari, M. and Hagenah, H. }},
  issn         = {{1662-9795}},
  pages        = {{65--70}},
  publisher    = {{Trans Tech Publications Ltd}},
  title        = {{{Internal Flow-Turning - An Innovative Technology for the Manufacture of Tailored Tubes}}},
  doi          = {{10.4028/www.scientific.net/kem.639.65}},
  volume       = {{639}},
  year         = {{2015}},
}

@book{21469,
  author       = {{Homberg, Werner and Rostek, Tim}},
  publisher    = {{Verlag und Vertriebsgesellschaft mbH}},
  title        = {{{Hochleistungsaktivelemente für landwirtschaftliche Maschinen aus ultrahochfestem Stahl}}},
  year         = {{2013}},
}

@article{21455,
  abstract     = {{<jats:p>nnovative ultra high-strength steels have excellent mechanical properties which commonly relate to the materials martensitic microstructure. As thermal heat treatments are state-of-the-art for obtaining the desired microstructure, innovative thermo-mechanical treatments are likely to give rise to even better material qualities. This article highlights various aspects of innovative thermo-mechanical hardening strategies for the processing of ultra high-strength steels, involving both press hardening and friction spinning operations.</jats:p>}},
  author       = {{Homberg, Werner and Rostek, Tim}},
  issn         = {{1662-9795}},
  journal      = {{Key Engineering Materials}},
  pages        = {{133--140}},
  title        = {{{Thermo-Mechanical Hardening of Ultra High-Strength Steels}}},
  doi          = {{10.4028/www.scientific.net/kem.549.133}},
  year         = {{2013}},
}

@inproceedings{21468,
  author       = {{Homberg, Werner and Rostek, Tim}},
  publisher    = {{Proc. IDDRG 2013}},
  title        = {{{Processing of Ultra High-Strength Steels involving Thermo-mechanical Hardening Effects}}},
  year         = {{2013}},
}