Content:
Deformation Mechanisms and Phase Transformations
In modern steels and engineering materials multiple phases often coexist. The mechanical properties strongly depend on the volume fractions and size distribution of the coexisting phases. The modeling of the mechanical behaviour of these heterogeneous materials requires solving phase and grain boundary motion, diffusion and fluid dynamics problems at the same time. The project group integrates expertise from the different ICAMS departments in order to develop a simulation platform for industrial and academic research.
Representative volume element and its application for TRIP steel.
Future potential
Inside the simulation platform, the crystal plasticity finite element can model the crystallographic texture, the grain shape evolution and is able to calculate the local stresses, the statistically stored dislocation and geometrically necessary dislocation densities at different material points. The phase field can model the grain subdivision recrystalization and phase transformation. The direct application of the simulation platform will be metal forming process modelling and heat treatment modelling to reduce durations and costs of material development.
Structure
The research activity of this project group includes deformation-transformation coupling simulation platforms development, plastic deformation and phase transformation mechanism studies, deformation dominating topics and phase transformation dominating projects. These projects are mainly belonging to the ICAMS departments MMM, STKS and IEHK.
Simulation platforms development
OpenPhase software development
(O. Shchyglo, I. Steinbach)
Efficient numerical approach for multiphysical system evolutions
(A. Ma, B. Schmaling)
Mechanism study project
Phase transformation by molecular dynamics
(C. Begau)
Methods
- Crystal plasticity finite element methods
- Phase field methods
- Lattice Boltzmann methods
These methods are coupled in order to bridge time and length scales in the simulation of mechanical properties.
Collaboration
This project group is tightly
connected with other project groups including
Microstructure property
relationship,
Light element and deformation mechanisms and
Thermodynamic modelling
through modelling parameters determination and modelling results
evaluation.
