Mesoscale simulation of grain boundaries

  • Date: Feb 15, 2024
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Prof. Dr.-Ing. Markus Stricker
  • ICAMS, Ruhr-Universität Bochum
  • Location: Max-Planck-Institut für Eisenforschung GmbH
  • Room: Large Conference Room No. 203
  • Host: on invitation of Dr. Tobias Brink and Prof. Gerhard Dehm
Mesoscale simulation of grain boundaries
The mechanical behavior of most metals in engineering applications is dominated by the grain size. Physics-based models of the interaction between dislocations and the grain boundary are important to correctly predict the plastic deformation behavior of polycrystalline materials. Dislocation-grain boundary interaction is complex and a challenge to model. In this talk, I will present a short history, opportunities, and challenges for modeling grain boundaries at the mesoscale using discrete dislocation dynamics. This includes an effective model and a novel model for physical transmission of dislocations through grain boundaries with a residual grain boundary dislocation. In addition, I will provide an outlook how these models can and should be calibrated using micromechanical experiments on bicrystals.

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