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@ARTICLE{Turnali:1046974,
      author       = {Turnali, Ahmet and Kibaroglu, Dilay and Evers, Nico and
                      Gehlmann, Jaqueline and Sayk, Lennart and Peter, Nicolas J.
                      and Elsayed, Abdelrahman and Noori, Mehdi and Allam, Tarek
                      and Schleifenbaum, Johannes Henrich and Haase, Christian},
      title        = {{S}egregation-guided alloy design via tailored
                      solidification behavior},
      journal      = {Materials today advances},
      volume       = {25},
      issn         = {2590-0498},
      address      = {Amsterdam},
      publisher    = {Elsevier},
      reportid     = {FZJ-2025-04042},
      pages        = {100549},
      year         = {2025},
      abstract     = {This study presents an alloy design perspective guided by
                      elemental segregation during solidification to determine the
                      site-specific chemistry and related local thermodynamic
                      properties of dendritic microstructures. This was
                      accomplished via manipulation of the microsegregation
                      behavior by means of nominal alloy composition and thermal
                      conditions of the solidification processes, including
                      modified cooling rates spanning over six orders of
                      magnitudes using ingot casting, directed energy deposition
                      (DED-LB/M) additive manufacturing (AM) and laser powder bed
                      fusion (PBF-LB/M) AM processes. Our approach was
                      demonstrated by computationally designing a novel
                      AlxCo25Fe(50-x)Ni25 multi-principal element alloy (MPEA) as
                      a model system, employing a combination of CALPHAD, Scheil,
                      and multiphase-field simulations, and by experimentally
                      validating the resulting microstructure evolution. The lower
                      Al content (x = 10.5) was designated to generate a
                      supersaturated single-phase fcc matrix suitable for
                      heat-treatments to trigger local phase transformations. The
                      higher Al content (x = 14.5) was selected to define the size
                      and morphology of dual-phase microstructures by controlling
                      phase nucleation and growth through segregation during
                      solidification. Our results showcased how selective
                      enrichment of the desired elements in interdendritic regions
                      can be employed to induce local phase transformations during
                      solidification or post heat-treatments, while their size can
                      be flexibly controlled by the degree of undercooling during
                      solidification. The suggested segregation-guided design
                      approach can be transferred to other alloy systems, enabling
                      effective tuning of local functional, structural, kinetic,
                      and, as shown in this study, thermodynamic properties of
                      dendritic microstructures by predetermining the nature of
                      the alloy matrix through tailored solidification behavior.},
      cin          = {IMD-1},
      ddc          = {600},
      cid          = {I:(DE-Juel1)IMD-1-20101013},
      pnm          = {1241 - Gas turbines (POF4-124)},
      pid          = {G:(DE-HGF)POF4-1241},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1016/j.mtadv.2024.100549},
      url          = {https://juser.fz-juelich.de/record/1046974},
}