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@ARTICLE{Janknecht:624365,
      author       = {Janknecht, Rebecca and Hahn, Rainer and Koutná, Nikola and
                      Todt, Juraj and Meindlhumer, Michael and Davydok, Anton and
                      Riedl, Helmut and Keckes, Jozef and Mayrhofer, Paul H.},
      title        = {{C}ombined {X}-ray microdiffraction and micromechanical
                      testing for direct measurement of thin film elastic
                      constants},
      journal      = {Materials and design},
      volume       = {252},
      issn         = {0264-1275},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PUBDB-2025-00834},
      pages        = {113720},
      year         = {2025},
      abstract     = {Direct measurement of elastic constants for thin films is
                      still far from routine and poses significant technical and
                      analytical challenges compared to bulk materials. Ab initio
                      Density Functional Theory calculations offer theoretical
                      input, however, discrepancies between model systems and
                      real-world properties persist, primarily due to a lack of
                      available experimental data for newly emerging material
                      systems. Moreover, computationally affordable models are
                      typically limited to defect-free single crystals, omitting
                      microstructural effects that strongly influence the
                      material’s behavior. This study addresses this gap by
                      proposing a novel experimental approach to measure
                      direction-dependent elastic constants, combining synchrotron
                      microdiffraction and micropillar compression, testing a
                      polycrystalline face-centered cubic TiN$_{0.8}$B$_{0.2}$
                      thin film, where linear elastic failure prevails. We have
                      established an advanced in-situ testing environment to
                      continuously record the load–displacement of the indenter
                      while simultaneously collecting the material’s deformation
                      response to uniform uniaxial compression. This dynamic
                      approach allows the evaluation of the orientation-dependent
                      elastic strain components and the macroscopic uniaxial
                      compressive stresses, each over time, enabling a
                      differential analysis to assess the elastic and X-ray
                      elastic constants. The excellent agreement between
                      experimental and ab initio data solidifies the here-proposed
                      robust method for direct elastic constant measurements,
                      which is crucial for advancements in thin film material
                      testing.},
      cin          = {DOOR ; HAS-User / Hereon},
      ddc          = {690},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)Hereon-20210428},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20221274
                      EC (I-20221274-EC)},
      pid          = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20221274-EC},
      experiment   = {EXP:(DE-H253)P-P03-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001432047500001},
      doi          = {10.1016/j.matdes.2025.113720},
      url          = {https://bib-pubdb1.desy.de/record/624365},
}