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Das Versuchsfeld des LUF Bildinformationen anzeigen
Temperaturüberwachung der Ölhydraulik einer Umformpresse Bildinformationen anzeigen
Thermomechanische Behandlung einer Stahlprobe (Presshärten) Bildinformationen anzeigen
Reibdrücken: Verschließen eines Rohres Bildinformationen anzeigen
Werkzeug zum Innendrückwalzen Bildinformationen anzeigen
Spanende Bearbeitung eines Umformwerkzeuges (Vorlesung Werkzeugtechnologie) Bildinformationen anzeigen

Das Versuchsfeld des LUF

Temperaturüberwachung der Ölhydraulik einer Umformpresse

Thermomechanische Behandlung einer Stahlprobe (Presshärten)

Reibdrücken: Verschließen eines Rohres

Werkzeug zum Innendrückwalzen

Spanende Bearbeitung eines Umformwerkzeuges (Vorlesung Werkzeugtechnologie)

Mitarbeiter des LUF

Thomas Borgert

 Thomas Borgert

Sonderforschungsbereich Transregio 285

Wissenschaftlicher Mitarbeiter - Teilprojekt C03

Umformende und Spanende Fertigungstechnik

Wissenschaftlicher Mitarbeiter

Institut für Leichtbau mit Hybridsystemen (ILH)

Kollegiat - Kollegiat im Forschungskolleg "Leicht - Effizient - Mobil"

+49 5251 60-3168
Pohlweg 53
33098 Paderborn

Liste im Research Information System öffnen


Influence of thermo-mechanical joining process on the microstructure of a hypoeutectic aluminium cast alloy

T. Borgert, M. Neuser, E. Wiens, O. Grydin, W. Homberg, M. Schaper, in: Materials Research Proceedings, Materials Research Forum LLC, 2023, pp. 187-194

<jats:p>Abstract. Requirements of multi-material construction involve adjustments to standard joining techniques. Especially the growing importance of integral cast components poses additional engineering challenges for the industry. One approach to achieve these goals are adaptable joining elements formed by friction spinning. This approach uses friction-induced heat to form customisable joining elements to join sheets for different boundary conditions, even for brittle cast materials. It is possible to react immediately to adapt to the joining process inline and reduce the amount of different joining elements. As the joining partner serve casting plates of the aluminium casting alloy EN AC–AlSi9, which is processed in the sand casting. Joining hypoeutectic AlSi alloys constitutes a challenge because the brittle character of these cause cracks in the joint during conventional mechanical joining. Furthermore, the friction-induced heat of the novel joining process causes a finer microstructure in the hypoeutectic AlSi9 casting alloy. In particular, the eutectic Si is more fine-grained, resulting in higher joint ductility. This study indicates the joining suitability of a hypoeutectic aluminium casting alloy in combination with adaptive manufactured additional joining elements. Here, various mechanical and microstructural investigations validate the influence of the thermomechanical joining technique. In conclusion, the potential of this joining process is presented regarding the joinability of cast aluminium components. </jats:p>


Energy saving potentials of an efficient recycling process of different aluminum rejects

T. Borgert, W. Homberg, Energy Reports (2022), 8, pp. 399-404


Assessment of mechanical and optical properties of Al 6060 alloy particles by removal of contaminants

P. Vieth, T. Borgert, W. Homberg, G. Grundmeier, Advanced Engineering Materials (2022)



Friction-Induced Recycling Process for User-Specific Semi-Finished Product Production

T. Borgert, W. Homberg, Metals (2021), 663

<jats:p>Modern forming processes often allow today the efficient production of complex parts. In order to increase the sustainability of forming processes it would be favorable if the forming of workpieces becomes possible using production waste. At the Chair of Forming and Machining Technology of the Paderborn University (LUF) research is presently conducted with the overall goal to produce workpieces directly from secondary aluminum (e.g., powder and chips). Therefore, friction-based forming processes like friction spinning (or cognate processes) are used due to their high efficiency. As a pre-step, the production of semi-finished parts was the subject of accorded research work at the LUF. Therefore, a friction-based hot extrusion process was used for the full recycling or rework of aluminum chips into profiles. Investigations of the recycled semi-finished products show that they are comparable to conventionally produced semi-finished products in terms of dimensional stability and shape accuracy. An analysis of the mechanical properties of hardness and tensile strength shows that a final product with good and homogeneously distributed properties can be produced. Furthermore, significant correlations to the friction spinning process could be found that are useful for the above-mentioned direct part production from secondary aluminum.</jats:p>

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