Simulation des Presshärtens unter Berücksichtigung der Gefügeumwandlung

Translated title of the contribution: Simulation of press hardening taking into account the structural transformation

Philipp Craighero

Research output: ThesisDiploma Thesis

Abstract

The aim of this work is the parameter identification and investigation of the predictive quality of a semi-empirical phase transformation model for mapping the microstructure development during the quenching of 22MnB5 in the indirect hot stamping process. The phase transformation model is implemented in the commercial FE-code LS-DYNA 971 and considers diffusion controlled and diffusionless phase transformations. To provide optimized parameter values for the infestigation of the prediction quality of the phase transformation model, a parameter identification process is carried out using the method of evolutionary optimization strategies and the Desirability Function after Harrington. Dilatometer measurements close to the time-temperature profiles of the indirect press hardening process, metallographic investigations and the determination of retained austenite serve as data base for this investigations. The investigation of the predictive quality of the phase transformation model and the resulting suggestions are made by considering metal-physical aspects.
Translated title of the contributionSimulation of press hardening taking into account the structural transformation
Original languageGerman
QualificationDipl.-Ing.
Supervisors/Advisors
  • Buchmayr, Bruno, Supervisor (internal)
  • Hippchen, Paul, Supervisor (external), External person
Award date22 Mar 2013
Publication statusPublished - 2013

Bibliographical note

embargoed until 31-12-2017

Keywords

  • Presshardeninf
  • phase transformation
  • LS-DYNA

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