Microstructure-based modeling of deformation and failure of martensitic steels
Event details
| Date | 26.11.2013 |
| Hour | 13:15 › 14:15 |
| Speaker |
Prof. Dr. Alexander Hartmaier, Interdisciplinary Center for Advanced Materials Simulation (ICAMS), Ruhr-Universität Bochum, Germany Bio : Dr. Alexander Hartmaier is currently Professor of Materials Science (Chair in Micromechanical and Macroscopic Modelling) at Ruhr-Universität Bochum/Germany and Director at the Interdisciplinary Centre for Advanced Materials Simulation (ICAMS). Before this appointment he has been Professor of Materials Science at the Friedrich-Alexander-University Erlangen-Nürnberg/Germany from November 2005 to May 2008. Prior to this position he headed the group “Nanostructured Materials” in the department “Theory of Mesoscopic Phenomena” of Prof. Huajian Gao at the Max Planck Institute for Metals Research in Stuttgart/Germany. This is the same institute where he worked on his PhD thesis with the topic “Modeling the brittle-to-ductile transition in tungsten single crystals,” which he finalized in the year 1999. The thesis has been awarded the Otto-Hahn-Medal of the Max Planck Society. In between his stays at the Max Planck Institute in Stuttgart, Dr. Hartmaier spent three years in industrial research in responsible functions as project leader and group leader. His academic career started at the University of Kaiserslautern/Germany, where he obtained the Diploma in Physics in 1995 (equivalent to M.Sc.). The focus of his research work lies on the investigation of deformation and fracture mechanisms of multiphase materials, mainly with scalebridging modeling and experimental methods. |
| Location | |
| Category | Conferences - Seminars |
Abstract : In order to model the mechanical performance of martensitic steels, which posses a hierarchical microstructure over several length scales, we need to describe plastic deformation of individual microstructural constituents, like laths, blocks and packets. This is accomplished by applying crystal plasticity models for single crystalline regions and by introducing representative volume elements (RVE) of the rather complex microstructures. It will be demonstrated how such RVE-based micromechanical simulations and homogenization methods can be applied to make predictions on macroscopic mechanical properties of tempered martensitic steels. Furthermore, it will be discussed how the relatively large number of input parameters that is needed for such micromechanical modeling can be obtained either by atomistic simulations or by sophisticated micromechanical experiments.
Practical information
- General public
- Free
Organizer
- IGM
Contact
- Géraldine Palaj