Mechanics and Thermodynamics of Materials

Hydrogen Diffusion

The influence of trapping on hydrogen permeation is studied both by a new diffusion model, including trapping already in the Gibbs energy, and by detailed experiments performed at partner institutions. The bubble formation in elastic-plastic materials is outlined in a detailed study. Particularly the concentration-dependent chemical diffusion coefficient is extracted from the study.

Stress State and Diffusion

The role of stress state in a diffusion process of a multicomponent system is outlined and demonstrated by an example. Particularly the role of vacancies is studied in detail.

Mechanics and Thermodynamics of Materials


  • Elementary principles to develop evolution equations for dissipative processes Partners: Czech Acad Sci, Brno, Svoboda; RU Bochum Inst. Mech. Hackl; Polish Acad Sci, Warszaw, Petryk
  • Martensitic and displacive phase transformations in metals and intermetallics Partners: Paris Materials Centre, Evry, Cailletaud et al.; Polish Acad Sci, Warszwa, Petryk et al.; U. Wien, Waitz; MUL, Clemens et al.; ESI Leoben, Dehm et al.
  • Phase transformation in nanoparticles and thin layers Partners: Nanoconsulting, Karlsruhe, Vollath; MUL, P. Mayrhofer; ESI Leoben, Dehm et al.
  • Thermodynamics of moving interfaces in metals, intermetallics and minerals, phase boundaries in particles and crystals Partners: Czech Acad Sci, Brno Svoboda; U Jena, Rettenmayr; FU Berlin, Abart; MPI Colloids & Interfaces, Potsdam/Golm, Fratzl; MUL, Clemens et al.; U Wien, Waitz; FWF Wien, Liu
  • Prediction of the microstructure of alloys and compounds, diffusive processes in multicomponent, multiparticle systems, application to development of steels with specific properties profile Partners: Czech Acad Sci, Brno, Svoboda; TU Graz, Cerjak et al; TU Wien, Kozeschnik et al; Böhler Uddeholm, Kapfenberg