G - Modeling dislocation and hardening processes from atomic scale to microstructure

Symposium organizers

Thomas Hochrainer (Universität Bremen, Germany)
Ahmed Hussein (Air Force Research Laboratory, USA)
Jaime Marian (University of California Los Angeles, USA)
Ghiath Monnet (Electricité de France R&D, France) - point of contact
Akiyoshi Nomoto (Central Research Institute of Electric Power Industry, Japan)

Symposium description

Dislocation mediated plasticity is an inherently multiscale process ranging from the atomic scale, where dislocations acquire their core structures and mobility, to the mechanical behavior at the grain scale, where dislocation structures cannot be explained by simple considerations of single dislocation properties. Modeling these phenomena across the scales requires the use of theoretical and numerical approaches extending beyond the theory of elasticity and also specific conceptual and computational tools of the nonlinear collective dynamics of defect structures.

The symposium is dedicated to presentation of recent advances in experiments and modeling of dislocation properties and microstructure formation. Submitted abstracts are expected to report on results of interest for the multiscale modeling community by enriching the knowledge at individual scales or improving connection between them. Topics of interest include:

  • Modeling at the atomic level of dislocation static and dynamic properties, such as dislocation core structure and mobility;
  • Atomistic simulations of dislocation interactions with dislocations, grain boundaries and local obstacles, such as precipitates and radiation-induced defects
  • Discrete dislocation dynamics methods and other mesoscopic simulation techniques;
  • Continuum dislocation dynamics and phase field modeling of dislocation interactions and structure formation;
  • Analytical nonlinear models of dislocation self-organization;
  • Scale-bridging methods linking processes occurring at different spatial and temporal scales;
  • Experimental techniques characterizing fine dislocation structures and metrics used to quantify them;
  • The relationship between dislocation structure formation, isotropic and kinematic hardening.

Invited speakers:

  • Vasily Bulatov (Lawrence Livermore National Laboratory, USA)
    Direct atomistic simulations of bulk crystal plasticity

  • Daniel Caillard (CEMES-CNRS, France)
    Solid solution hardening in Fe-X alloys (X = Si, Ni, Al, Cr)

  • Emmanuel Clouet (CEA Saclay, France)
    First-principles modelling of screw dislocation mobility in Zr and Ti

  • Benoit Devincre (CNRS/ONERA, France)
    Recent progress in dislocation dynamics simulation and its contribution to crystal plasticity modeling

  • Jaafar El-Awady (Johns Hopkins University, USA)
    Large scale dislocation dynamics simulations of plasticity and point defect evolution in persistent slip bands

  • Javier Gil Sevillano (Ceit-IK4 and Tecnun, University of Navarra, Spain)
    Elasto-plastic behaviour of nanostructured bcc iron <011> columnar structures

  • Mark Gilbert (Culham Center for Fusion Energy, UK)
    Atomistic simulations of screw dislocations: core structure, Peierls potential, and finite temperature motion

  • Istvan Groma (Eötvös Loránd University, Hungary)
    Time evolution of the velocity distribution of dislocations

  • Giacomo Po (University of California Los Angeles, USA)
    Continuum dislocation modeling of wedge indentation

  • Javier Segurado (IMDEA, Spain)
    Crystal plasticity simulations of the mechanical behaviour of Mg alloys

  • Michael Zaiser (FAU Universität Erlangen-Nürnberg, Germany)
    Continuum dislocation dynamics: From dislocation kinematics to work hardening

Key dates

  • Abstract submission deadline (oral):
    February 15th, 2016
  • Abstract acceptance notification:
    April 1st, 2016
  • Abstract submission deadline (poster):
    May 31st, 2016
  • Application deadline for student and post-doc grants:
    July, 18th 2016
  • Early registration deadline:
    September 5th, 2016
  • Image competition deadline
    September 15th, 2016
  • Registration deadline:
    October 7th, 2016