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@ARTICLE{Schloffer:224461,
      author       = {Schloffer, Martin and Rashkova, Boryana and Schöberl,
                      Thomas and Schwaighofer, Emanuel and Zhang, Zaoli and
                      Clemens, Helmut and Mayer, Svea},
      title        = {{E}volution of the $\omega$${_o}$ phase in a
                      $\beta$-stabilized multi-phase {T}i{A}l alloy and its effect
                      on hardness},
      journal      = {Acta materialia},
      volume       = {64},
      issn         = {1359-6454},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PUBDB-2015-03594},
      pages        = {241 - 252},
      year         = {2014},
      abstract     = {The intermetallic b-stabilized
                      Ti–43.5Al–4Nb–1Mo–0.1B alloy (in $at.\%),$ termed
                      TNM alloy, is designed to be used at elevated
                      temperatures,typically up to 750 C. To understand the
                      evolution of the microstructures during heat treatments and
                      subsequent creep tests,an understanding of the phase
                      transformations and decomposition reactions that occur is
                      necessary. The present study deals with thedevelopment and
                      growth mechanism of the ω${_o}$ phase, which forms in the
                      b${_o}$ phase during static annealing treatments and creep
                      testsperformed at 750, 780 and 800 C using an applied stress
                      of 150 MPa. In situ high-energy X-ray diffraction
                      experiments were conducted to investigate the decomposition
                      behaviour of the ω${_o}$ phase during heating as well as to
                      determine its dissolution temperature.
                      Highresolutiontransmission electron microscopy was used to
                      study the coarsening of xo grains during creep. The chemical
                      compositionof b${_o}$ and ω${_o}$ was determined by means
                      of energy dispersive X-ray microanalysis. In particular, the
                      impact of the Mo content on thegrowth of the ω${_o}$ grains
                      within the b${_o}$ matrix was investigated. Additionally,
                      nanohardness measurements in c, a${_2}$, b${_o}$ and
                      (b${_o}$ + ω${_o}$) grainswere performed by cube corner
                      indentation. The results show that b${_o}$ is the hardest
                      phase in the TiAl–Nb–Mo alloy system when
                      finelydispersed xo precipitates are present.},
      cin          = {HZG},
      ddc          = {670},
      cid          = {I:(DE-H253)HZG-20120731},
      pnm          = {6G3 - PETRA III (POF3-622) / PETRA Beamline P07
                      (POF2-54G14) / ELISA - European Light Sources Activities -
                      Synchrotrons and Free Electron Lasers (226716)},
      pid          = {G:(DE-HGF)POF3-6G3 / G:(DE-H253)POF2-P07-20130405 /
                      G:(EU-Grant)226716},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000331017800024},
      doi          = {10.1016/j.actamat.2013.10.036},
      url          = {https://bib-pubdb1.desy.de/record/224461},
}