| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Meschut, G.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2025Effects of various process parameters in the joining process on the squeeze flow of highly viscous thermal interface materials
- 2023The Identification of a New Liquid Metal Embrittlement (LME) Type in Resistance Spot Welding of Advanced High Strength Steels on Reduced Flange Widthscitations
- 2022A Review on the Modeling of the Clinching Process Chain—Part II: Joining Processcitations
- 2022Review on mechanical joining by plastic deformationcitations
- 2022Consideration of the manufacturing history of sheet metal components for the adaptation of a clinching processcitations
- 2021Modeling of component failure due to notch effects in press-hardened steel caused by mechanical and thermo-mechanical joints under crash load
- 2021Joining suitability of cast aluminium for self-piercing rivetingcitations
- 2021Clinching of thermoplastic composites and metals - a comparison of three novel joining technologiescitations
- 2020Joining of Thermoplastic Composites with Metals Using Resistance Element Weldingcitations
- 2020Influence of the process temperature on the forming behaviour and the friction during bulk forming of high nitrogen steelcitations
- 2019Prevention of liquid metal embrittlement crackscitations
- 2019Lebensdauerberechnung hybrider Klebverbindungen – Prüf- und Modellierungsstrategie zur Betriebsfestigkeitsanalyse von semistrukturellen Klebverbindungen mit FKV-Fügepartner
- 2019Phenomena of forming and failure in joining hybrid structures - Experimental and numerical studies of clinching thermoplastic composites and metalcitations
- 2019Investigation of liquid metal embrittlement of dual phase steel joints by electro-thermomechanical spot-welding simulationcitations
- 2015Investigation on joint characteristics of laser beam welded press hardenable ultra-high strength steels with ferritic-martensitic and martensitic microstructurecitations
- 2014Evaluation of damage to carbon-fibre composites induced by self-pierce rivetingcitations
- 2013Verfahren zum Verbinden von flächigen oder profilartigen Strukturen aus thermoplastischen Faserverbundkunststoffen mit metallischen Strukturen
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article
Influence of the process temperature on the forming behaviour and the friction during bulk forming of high nitrogen steel
Abstract
Due to the trend towards lightweight design in car body development mechanical joining technologies become increasingly important. These techniques allow for the joining of dissimilar materials and thus enable multi-material design, while thermic joining methods reach their limits. Semi-tubular self-piercing riveting is an important mechanical joining technology. The rivet production, however, is costly and time-consuming, as the process consists of several process steps including the heat treatment and coating of the rivets in order to achieve an adequate strength and corrosion resistance. The use of high nitrogen steel as rivet material leads to the possibility of reducing process steps and hence increasing the efficiency of the process. However, the high tool loads being expected due to the high strain hardening of the material are a major challenge during the rivet production. Thus, there is a need for appropriate forming strategies, such as the manufacturing of the rivets at elevated temperatures. Prior investigations led to the conclusion that forming already at 200 °C results in a distinct reduction of the yield strength. To create a deeper understanding of the forming behaviour of high nitrogen steel at elevated temperatures, compression tests were conducted in a temperature range between room temperature and 200 °C. The determined true stress – true strain curves are the basis for the further process and tool design of the rivet production. Another key factor for the rivet manufacturing at elevated temperatures is the influence of the process temperature on the tribological conditions. For this reason, ring compression tests at room temperature and 200 °C are carried out. The friction factors are determined on the basis of calibration curves resulting from the numerical analysis of the ring compression process. The investigations indicate that the friction factor at 200 °C is significantly higher compared to room temperature. This essential fact has to be taken into account for the process and tool design for the rivet production using high nitrogen steel.