The high-temperature strength of some Fe3Al alloys Original Research Article

The high-temperature strength of a Fe–25%Al–2%Nb alloy in both a solutionised state and a precipitated state has been determined for temperatures up to 900 °C and compared with that of a solution hardened Fe3Al alloy. Some comparisons of these materials with previously reported Fe3Al-based materials are also made. The Fe–25%Al–2%Nb material is capable of retaining good strength to temperatures above 800 °C, but rapid coarsening of the Laves precipitate particles at higher temperatures leads to strength loss at such temperatures. The presence of stable dispersed particles at the intermediate temperatures means that good strength can be retained to very low strain rates.