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@ARTICLE{Ganesh:1017208,
      author       = {Ganesh, Vishnu and Dorow-Gerspach, Daniel and Linsmeier,
                      Christian},
      title        = {{D}etermination of mechanical properties of tungsten/steel
                      composites using image based microstructure modelling},
      journal      = {Nuclear materials and energy},
      volume       = {36},
      issn         = {2352-1791},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2023-04019},
      pages        = {101496 -},
      year         = {2023},
      abstract     = {Graded tungsten/steel composite is a potential interlayer
                      to alleviate the thermal expansion mismatch between tungsten
                      (W) armour and steel structure in the first wall (FW) of a
                      future fusion reactor. However, existing thermomechanical
                      finite element (FE) numerical simulations of the FW
                      featuring this graded interlayer have modelled the
                      composites inappropriately by assuming their properties to
                      follow an elementary rule of mixtures; linear interpolation
                      of the properties of W and steel based on the volume content
                      of W. This opens up the question of determining the
                      properties of the composites appropriately. Thus, in this
                      study, a microstructural image based modelling technique is
                      proposed to predict the macroscopic mechanical properties of
                      the composites. As a case study, plasma sprayed W/steel
                      composites of three compositions were investigated. FE
                      simulations of the corresponding microstructures, captured
                      via scanning electron microscopy (SEM), were carried out
                      with the help of an open source code (OOF2) which transforms
                      the SEM images into a 2-dimensional mesh. For the
                      determination of macroscopic mechanical properties, image
                      based finite element (FE) simulations of the mapped mesh
                      were carried out. These simulations were done on
                      microstructures of different physical sizes, including
                      mesoscale and microscale morphological artefacts. Also, for
                      each physical size, several SEM images were captured at
                      different sites in the composites to consider the randomness
                      of the material. FE simulations were conducted at various
                      virtual temperatures between 20 °C and 700 °C. The
                      predicted mechanical properties agreed much better with the
                      few available experimentally determined literature values of
                      the composites than the simple linear interpolation.},
      cin          = {IEK-4},
      ddc          = {624},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
      pid          = {G:(DE-HGF)POF4-134},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001074529100001},
      doi          = {10.1016/j.nme.2023.101496},
      url          = {https://juser.fz-juelich.de/record/1017208},
}