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Highlight Lecture

Nano-to-meso theoretical and experimental study of mechanical properties of Fe-Al-Ti superalloys

Thursday (27.09.2018)
14:45 - 15:00 S1/01 - A03
Part of:

Fe-Al-based superalloys containing sub-micron Fe2AlTi cuboids coherently embedded into a disordered Fe-Al solid solution are intensively studied as materials for high-temperature applications. We focused on the Fe71Al22Ti7 alloy composition for which the transmission electron microscopy (TEM) revealed the superalloy nano-structure and the energy-dispersive X-ray (EDX) technique detected the composition of individual phases. Subsequent quantum-mechanical calculations predicted

these two phases to be elastically very different. The differences in the elastic response were detected also experimentally by room-temperature quasistatic nano-/micro-indentation and nano-scale dynamic mechanical analysis (nanoDMA). Regarding high-temperature macro-scale measurements, small-punch testing was performed and the data were analyzed using a rheological model.

Dr. Martin Friak
Czech Academy of Sciences
Additional Authors:
  • Prof. Vilma Bursikova
    Masaryk University
  • Dr. Nadezda Pizurova
    Institute of Physics of Materials
  • Dr. Petr Dymacek
    Institute of Physics of Materials
  • Dr. Ferdinand Dobes
    Institute of Physics of Materials
  • Prof. David Holec
    Montanuniversität Leoben
  • Dr. Yvonna Jiraskova
    Institute of Physics of Materials
  • Prof. Dr. Mojmir Sob
    Institute of Physics of Materials