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@ARTICLE{SjgrenLevin:601027,
      author       = {Sjögren-Levin, Elis and Pantleon, Wolfgang and Ahadi,
                      Aylin and Hegedüs, Zoltan and Lienert, Ulrich and Tsuji,
                      Nobuhiro and Ameyama, Kei and Orlov, Dmytro},
      title        = {{G}rain-level mechanism of plastic deformation in harmonic
                      structure materials revealed by high resolution {X}-ray
                      diffraction},
      journal      = {Acta materialia},
      volume       = {265},
      issn         = {1359-6454},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PUBDB-2024-00064},
      pages        = {119623},
      year         = {2024},
      abstract     = {Materials with heterogeneous microstructures have been
                      reported to have an attractive combination of strength and
                      ductility. This is attributed to synergistic strengthening
                      effects from the difference in strength of fine- and
                      coarse-grained regions. Understanding the interaction of the
                      regions is crucial for further optimization of the
                      microstructures. In this work, we fabricated nickel of
                      harmonic structure (HS) and a reference with homogenous
                      coarse grains. The HS constitutes of an interconnected
                      fine-grained network that surrounds regions of coarse
                      grains. The interplay of the regions was studied by
                      monitoring Bragg reflections from individual grains in situ
                      during tensile deformation until approximately 2 $\%$ strain
                      through synchrotron X-ray diffraction. The technique allows
                      grain-level assessment of the degree of plastic deformation.
                      Two grains were followed in the reference and two small
                      grains (fine-grained region) and two large grains
                      (coarse-grained region) in the HS. Three deformation regimes
                      were identified: elastic deformation, onset of plastic
                      deformation and significant plastic deformation. Our results
                      reveal that the large grains in the harmonic structure onset
                      plastic deformation during the macroscopic elastic stage.
                      With increasing applied stress, the small grains yield
                      plastically also and once a large fraction of the
                      fine-grained network deforms plastically the large grains
                      undergo significant plastic deformation. Notably, the onset
                      of significant plastic deformation of large grains in the HS
                      occurs at approximately 100 MPa higher applied stress than
                      in the grains in the reference. This shows that fine grains
                      constrain the large grains from deforming plastically in the
                      HS.},
      cin          = {DOOR ; HAS-User / FS-PETRA-D / LUND},
      ddc          = {670},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PETRA-D-20210408 / I:(DE-H253)LUND-20191211},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      FS-Proposal: I-20170726 EC (I-20170726-EC) / SWEDEN-DESY -
                      SWEDEN-DESY Collaboration $(2020_Join2-SWEDEN-DESY)$},
      pid          = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G3 /
                      G:(DE-H253)I-20170726-EC /
                      $G:(DE-HGF)2020_Join2-SWEDEN-DESY$},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001152656800001},
      doi          = {10.1016/j.actamat.2023.119623},
      url          = {https://bib-pubdb1.desy.de/record/601027},
}