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Twinning models in self-consistent texture simulations of TWIP steels
Simulation and modelling of metallurgical processes in steelmaking : The selection of publications is based on presentations given at the 2nd Int. Conference on "Simulation and Modelling of Metallurgical Processes in Steelmaking", Steelsim 2007, which has taken place on September 12 - 14, 2007 in Graz/Seggau, Austria
Düsseldorf: Verlag Stahleisen, 2008 (Steel research international 79.2008, Nr.8)
|International Conference of Simulation and Modelling of Metallurgical Processes in Steelmaking (STEELSIM) <2, 2007, Graz>|
| Conference Paper, Journal Article|
|Fraunhofer IWM ()|
| TWIP steel; twinning induced plasticity; VPSC; PTR-scheme; Kalidindi twinning model; texture|
The high work hardening rate and ductility of high manganese austenitic steels is mainly attributed to the strong twinning induced plasticity (TWIP) effect found in the material. With a low stacking fault energy, mechanical twinning acts as a competitive mechanism to the more common dislocation glide. In order to understand the micromechanical behaviour of such steels, especially with respect to texture and anisotropy, constitutive models for twinning which account for the TWIP effect both in orientation changes and plastic behaviour are required. Using a self-consistent texture model, we evaluate two twin modelling approaches in view of prediction of crystallographic texture. Tension experiments were carried out on a rolled TWIP sheet and the textures compared with the simulated results. The evolution of twin volume fractions from the two models is also evaluated.