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@ARTICLE{Tsybenko:908650,
      author       = {Tsybenko, Hanna and Tian, Chunhua and Rau, Julia and
                      Breitbach, Benjamin and Schreiber, Paul and Greiner,
                      Christian and Dehm, Gerhard and Brinckmann, Steffen},
      title        = {{D}eformation and phase transformation in polycrystalline
                      cementite ({F}e3{C}) during single- and multi-pass sliding
                      wear},
      journal      = {Acta materialia},
      volume       = {227},
      issn         = {1359-6454},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2022-02739},
      pages        = {117694 -},
      year         = {2022},
      abstract     = {Cementite (Fe3C) plays a major role in the tribological
                      performance of rail and bearing steels. Nonetheless, the
                      current understanding of its deformation behavior during
                      wear is limited because it is conventionally embedded in a
                      matrix. Here, we investigate the deformation and chemical
                      evolution of bulk polycrystalline cementite during
                      single-pass sliding at a contact pressure of 31 GPa and
                      reciprocating multi-pass sliding at 3.3 GPa. The deformation
                      behavior of cementite was studied by electron backscatter
                      diffraction for slip trace analysis and transmission
                      electron microscopy. Our results demonstrate activation of
                      several deformation mechanisms below the contact surface:
                      dislocation slip, shear band formation, fragmentation, grain
                      boundary sliding, and grain rotation. During sliding wear,
                      cementite ductility is enhanced due to the confined volume,
                      shear/compression domination, and potentially frictional
                      heating. The microstructural alterations during multi-pass
                      wear increase the subsurface nanoindentation hardness by up
                      to 2.7 GPa. In addition, we report Hägg carbide (Fe5C2)
                      formation in the uppermost deformed regions after both
                      sliding experiments. Based on the results of electron and
                      X-ray diffraction, as well as atom probe tomography, we
                      propose potential sources of excess carbon and mechanisms
                      that promote the phase transformation.},
      cin          = {IEK-2},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-2-20101013},
      pnm          = {1241 - Gas turbines (POF4-124)},
      pid          = {G:(DE-HGF)POF4-1241},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000792706700010},
      doi          = {10.1016/j.actamat.2022.117694},
      url          = {https://juser.fz-juelich.de/record/908650},
}