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.