Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg



Development of a methodology for simulation-based determination of material parameters for the forming and heat treatment simulation of steel materials



Project Status: finished

Members


The numerical simulation of complex heat treatment processes essentially depends on the quality of the used material imput parameters. In particular, the description of phase transitions by time-temperature-transformation-diagrams (TTT-diagrams) is crucial for the calculation of the material properties. To show the influences of batch variations, as well as the deformation history of the material, a first attempt was to develop an experimental method for the determination of TTT diagrams and TTT diagrams of preformed specimens. Based on the aquired findings and on empirical calculation models, a method is developed which can depict the transformation  behavior with sufficient accuracy and reduced testing effort. This can significantly improve the simulative design of heat treatment processes.

 

Comparison of the martensite formation between polished cut and simulation of a heat-treated specimen


Research Groups


Publications

    2014

    • Lutz, S.; Weninger, J.; Helldörfer, B.; Merklein, M.:
      Numerical investigation of temperature and phase development of (deformation-) dilatometer specimens.
      In: Larkiola, J. (Edtr.): Material Forming - ESAFORM 2014, 2014, pp. 1539-1544

    • Lutz, S.; Weninger, J.; Helldörfer, B.; Merklein, M.:
      Untersuchung des Einflusses von Chargenschwankungen auf das Umwandlungsverhalten übereutektoider Stähle.
      In: W. Grellmann, H. Frenz (Edtr.): Tagungsband Werkstoffprüfung, DVM e.V., 2014, pp. 169-174

    • Lutz, S.; Weninger, J.; Helldörfer, B.; Merklein, M.:
      Evaluierung von Modellen zur Beschreibung der Umwandlungsplastizität durch experimentelle Untersuchungen an einem Wälzlagerstahl.
      In: Merklein, M. (Edtr.): 9. Erlanger Workshop Warmblechumformung, Meisenbach, 2014, pp. 77-88

    2013

    • Lutz, S.; Weninger, J.; Helldörfer, B.; Merklein, M.:
      Numerische Untersuchungen der Temperatur- und Phasenentwicklung in (Umform-) Dilatometerproben.
      In: Hildebrand, J.; Loose, T.; Sakkietibutra, J.; Brand, M. (Edtrs.): Simulationsforum 2013 - Schweißen und Wärmebehandlung, docupoint GmbH, Barleben, 2013, pp. 35 - 42

    Letztes Update: 09.12.2015