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icams² 2013

Materials design based on predictive ab initio thermodynamics

Fritz Körmann, Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany

Blazej Grabowski, , Düsseldorf, Germany

Tilmann Hickel, Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany

Jörg Neugebauer, Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany

Time & Place
  • Date: 06.05.2013
  • Time: 12:20
  • Place: ICAMS² 2013, International Colloquium on Advanced Materials Simulation, Bochum, Germany

Abstract

A key requirement in developing predictive multi-scale modeling is the availability of accurate computational tools determining energies not only at T=0K but also under realistic conditions, i.e., at finite temperature. 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 such as heat capacity, thermal expansion coefficients, and elastic constants with an accuracy that matches and often even rivals available experimental data.

In the talk a brief review of the fundamentals and recent developments of combining modern fully parameter-free ab initio methods with thermodynamic concepts will be given with special emphasis on structural materials. 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, e.g., for modern high strength TWIP/TRIP steels for understanding failure mechanisms, such as hydrogen embrittlement, or for identifying chemical trends in the performance of light weight metallic alloys.

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