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@ARTICLE{Bernardi:637332,
      author       = {Bernardi, Matteo and Canelo-Yubero, David and Chen, Ting
                      and Suhuddin, Uceu F. H. and Bergmann, Luciano and
                      Klusemann, Benjamin},
      title        = {{T}hree-dimensional mapping of residual stresses and crack
                      propagation in refill friction stir spot welded aluminium
                      samples via synchrotron {X}-ray diffraction and {X}-ray
                      micro-computed tomography},
      journal      = {International journal of fatigue},
      volume       = {202},
      issn         = {0142-1123},
      address      = {Oxford},
      publisher    = {Elsevier},
      reportid     = {PUBDB-2025-03824},
      pages        = {109223},
      year         = {2026},
      abstract     = {Refill Friction Stir Spot Welding (refill FSSW) shows
                      strong potential to replace riveting in the aerospace
                      industry. However, the complex deformation and thermal
                      effects associated with this process lead to residual
                      stresses that may influence the fatigue life of the joint.
                      This study reveals for the first time the non-uniform
                      residual stresses across the thickness of a refill FSSW
                      aluminium joint using synchrotron X-ray radiation in
                      combination with a conical slit cell. Clear differences can
                      be observed in the stresses between the region subjected to
                      plasticisation and that affected solely by heat input. A
                      fatigue testing campaign on the aluminium joints
                      demonstrated their high reproducibility and robustness.
                      X-ray micro-computed tomography enabled the
                      three-dimensional visualisation of fatigue crack nucleation
                      and propagation morphology, the latter correlated with the
                      tensile residual stresses in the weld area. The results can
                      contribute to the development of more accurate fatigue life
                      prediction models and improve the overall reliability of
                      refill FSSW aluminium joints in engineering applications.},
      cin          = {Hereon / DOOR ; HAS-User},
      ddc          = {600},
      cid          = {I:(DE-H253)Hereon-20210428 / I:(DE-H253)HAS-User-20120731},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3)},
      pid          = {G:(DE-HGF)POF4-6G3},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1016/j.ijfatigue.2025.109223},
      url          = {https://bib-pubdb1.desy.de/record/637332},
}