Abstract
The Fe3Al iron aluminide alloyed by low concentrations of Nb and C (c Nb, c C) is studied. The influence of the c Nb/c C ratio on the structure and high-temperature yield strength of iron aluminide was investigated. The structure and phase composition were studied by scanning electron microscope equipped with EDS and EBSD. The strengthening mechanisms are detected as strengthening by incoherent precipitates of NbC and as a solid solution hardening by Nb atoms.
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