Microstructure and High Temperature Strength in Fe3Al Base Alloys Containing Fine Carbide Particles
The precipitation of carbide particles and high temperature strength in a Fe3Al base alloy with C, Cr and Mo were investigated. The -Fe3AlC (E21) and M2C (B81) phases precipitated in the temperature range between 1000 °C and 600 °C in periods up to 10 h. The -Fe3AlC phase tended to precipitate in a film-like morphology on grain boundaries by annealing at relatively high temperatures. The M2C phase was dispersed in a fine needle shape within grains by annealing at 700 °C. The film-like precipitates covering grain boundaries as well as finely dispersed M2C particles was suggested to contribute to strengthening at 600 °C.
Jian-Feng Nie and Allan Morton
S. Kobayashi et al., "Microstructure and High Temperature Strength in Fe3Al Base Alloys Containing Fine Carbide Particles ", Materials Science Forum, Vols. 654-656, pp. 476-479, 2010