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@ARTICLE{Samaee:943388,
      author       = {Samaee, Vahid and Sandfeld, Stefan and Idrissi, Hosni and
                      Groten, Jonas and Pardoen, Thomas and Schwaiger, Ruth and
                      Schryvers, Dominique},
      title        = {{D}islocation structures and the role of grain boundaries
                      in cyclically deformed {N}i micropillars},
      journal      = {Materials science and engineering / A},
      volume       = {769},
      issn         = {0921-5093},
      address      = {Amsterdam},
      publisher    = {Elsevier},
      reportid     = {FZJ-2023-00982},
      pages        = {138295 -},
      year         = {2020},
      abstract     = {Transmission electron microscopy and finite element-based
                      dislocation simulations were combined to study the
                      development of dislocation microstructures after cyclic
                      deformation of single crystal and bicrystal Ni micropillars
                      oriented for multi-slip. A direct correlation between large
                      accumulation of plastic strain and the presence of
                      dislocation cell walls in the single crystal micropillars
                      was observed, while the presence of the grain boundary
                      hampered the formation of wall-like structures in agreement
                      with a smaller accumulated plastic strain. Automated
                      crystallographic orientation and nanostrain mapping using
                      transmission electron microscopy revealed the presence of
                      lattice heterogeneities associated to the cell walls
                      including long range elastic strain fields. By combining the
                      nanostrain mapping with an inverse modelling approach,
                      information about dislocation density, line orientation and
                      Burgers vector direction was derived, which is not
                      accessible otherwise in such dense dislocation structures.
                      Simulations showed that the image forces associated with the
                      grain boundary in this specific bicrystal configuration have
                      only a minor influence on dislocation behavior. Thus, the
                      reduced occurrence of “mature” cell walls in the
                      bicrystal can be attributed to the available volume, which
                      is too small to accommodate cell structures.},
      cin          = {IAS-9 / IEK-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-9-20201008 / I:(DE-Juel1)IEK-2-20101013},
      pnm          = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511) / MuDiLingo - A
                      Multiscale Dislocation Language for Data-Driven Materials
                      Science (759419)},
      pid          = {G:(DE-HGF)POF4-5111 / G:(EU-Grant)759419},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000500373800018},
      doi          = {10.1016/j.msea.2019.138295},
      url          = {https://juser.fz-juelich.de/record/943388},
}