High-temperature strength and creep resistance of FeAl

In an effort to improve the high-temperature mechanical properties of FeAl, we investigated the effects of alloying addition and heat treatment temperature on the tensile and creep properties of Fe–40at.% Al. Alloying of Fe–40Al with titanium, molybdenum, zirconium, boron and carbon, and heat treating at 1300 °C resulted in significant improvement in strength and creep resistance due to solid solution and precipitation hardening mechanisms. The strength and the creep resistance of FeAl alloys at 700 °C is better than several grades of stainless steels, superalloys, Fe3Al alloys and an ODS-FeAl alloy.