Berlin 2008 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

SYMS: Symposium Modern developments in multiphysics materials simulations

SYMS 2: Modern developments in multiphysics materials simulations II - Poster (joined by SYEC posters)

SYMS 2.6: Poster

Donnerstag, 28. Februar 2008, 18:30–19:30, Poster F

Novel multi-descriptive approach to crystal plasticity of textured β-Ti alloys — •Duancheng Ma, Martin Friák, Jörg Neugebauer, and Dierk Raabe — Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 402 37, Düsseldorf, Germany

The (thermo-)mechanical treatment constitutes a back-bone processing step in many industrial production routes. The crystal plasticity finite element method (CP-FEM) is an excellent continuum-based method to predict the changes in texture and mechanical properties of polycrystals induced by e.g. cold-rolling. The methodology is based on (i) a detailed understanding of the deformation behavior of crystals as well as (ii) a number of input material parameters that are in most cases difficult to access and measure experimentally. First principle calculations, that take into account a discrete character of matter on the atomic scale, provide an alternative way to investigate the materials with respect to the mechanical properties both quantitatively and qualitatively without any empirical parameters. We thus introduce a new multi-descriptive concept that is based on (i) the extraction of the input data from the density-functional (DFT) calculations and (ii) the up-scale transfer of the parameters into the CP-FEM simulations. The method is exemplified on texture β-Ti alloys intended for bio-medical applications.