Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Deformation and failure behavior of TRIP-steel



Datum: 27.06.2012


Author


Reporter

  • Prof. Dr.-Ing. habil. M. Merklein
  • Prof. Dr.-Ing. K. Roll

The scope of this thesis was the analysis of the temperature dependant deformation and failure behavior of TRIP-steel. Failure occurs during or after the deep drawing process, which cannot be identified by using the FLC criterion. The main focus lies on the identification and characterization of damage mechanisms in TRIP steel, the assessment of the interdependence of the forming process, deformation induced temperature development and component damage. To analyse failure initialization, components with rotational symmetry, modified before deep drawing, are used, to create locally non-linear deformation paths. Additionally the geometry of modified components is analyzed by numerical simulation techniques and correlated with the damage occurrence of experimental samples. Material damage with and without surface contact can result, dependant on sample temperature and modification geometry. These damage structures in the area of deep drawing are not covered by the FLC criterion.