Design and Discovery of Structural Materials on the Computer: Prospects and Challenges
16:00 - 18:00
Prof. Dr. Jörg Neugebauer
MPI für Eisenforschung Düsseldorf
A key requirement in developing systematic tools to explore and predict properties of materials not yet synthesized is the availability of accurate computational tools determining energies not only at T = 0 K but also under realistic conditions. Combining accurate first principles calculations with mesoscopic/ macroscopic thermodynamic and/or kinetic concepts allows now to address this issue and to determine free energies and derived thermodynamic quantities. In the talk it will be shown how novel sampling strategies in configuration space together with highly converged density-functional theory calculations allow an unbiased and accurate determination of all relevant temperature dependent free energy contributions. The flexibility and the predictive power of these approaches and the impact they can have in developing new strategies in materials design will be discussed for modern ultra-high strength steels, light weight metallic alloys such as Mg-based alloys as well as in understanding the origins of failure mechanisms such as hydrogen embrittlement.