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@ARTICLE{Volz:847991,
      author       = {Volz, N. and Zenk, C. H. and Cherukuri, R. and Kalfhaus, T.
                      and Weiser, M. and Makineni, S. K. and Betzing, C. and Lenz,
                      M. and Gault, B. and Fries, S. G. and Schreuer, J. and
                      Vaßen, R. and Virtanen, S. and Raabe, D. and Spiecker, E.
                      and Neumeier, S. and Göken, M.},
      title        = {{T}hermophysical and {M}echanical {P}roperties of
                      {A}dvanced {S}ingle {C}rystalline {C}o-base {S}uperalloys},
      journal      = {Metallurgical and materials transactions / A},
      volume       = {49A},
      number       = {9},
      issn         = {1543-1940},
      address      = {Boston},
      publisher    = {Springer},
      reportid     = {FZJ-2018-03299},
      pages        = {4099-4109},
      year         = {2018},
      abstract     = {A set of advanced single crystalline γ′ strengthened
                      Co-base superalloys with at least nine alloying elements
                      (Co, Ni, Al, W, Ti, Ta, Cr, Si, Hf, Re) has been developed
                      and investigated. The objective was to generate multinary
                      Co-base superalloys with significantly improved properties
                      compared to the original Co-Al-W-based alloys. All alloys
                      show the typical γ/γ′ two-phase microstructure. A γ′
                      solvus temperature up to 1174 °C and γ′ volume fractions
                      between 40 and 60 pct at 1050 °C could be achieved, which
                      is significantly higher compared to most other Co-Al-W-based
                      superalloys. However, higher contents of Ti, Ta, and the
                      addition of Re decrease the long-term stability. Atom probe
                      tomography revealed that Re does not partition to the γ
                      phase as strongly as in Ni-base superalloys. Compression
                      creep properties were investigated at 1050 °C and 125 MPa
                      in 〈001〉 direction. The creep resistance is close to
                      that of first generation Ni-base superalloys. The creep
                      mechanisms of the Re-containing alloy was further
                      investigated and it was found that the deformation is
                      located preferentially in the γ channels although some
                      precipitates are sheared during early stages of creep. The
                      addition of Re did not improve the mechanical properties and
                      is therefore not considered as a crucial element in the
                      design of future Co-base superalloys for high temperature
                      applications. Thermodynamic calculations describe well how
                      the alloying elements influence the transformation
                      temperatures although there is still an offset in the actual
                      values. Furthermore, a full set of elastic constants of one
                      of the multinary alloys is presented, showing increased
                      elastic stiffness leading to a higher Young’s modulus for
                      the investigated alloy, compared to conventional Ni-base
                      superalloys. The oxidation resistance is significantly
                      improved compared to the ternary Co-Al-W compound. A
                      complete thermal barrier coating system was applied
                      successfully},
      cin          = {IEK-1},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000440714700028},
      doi          = {10.1007/s11661-018-4705-1},
      url          = {https://juser.fz-juelich.de/record/847991},
}