Microstructural control of FeCrAl alloys using Mo and Nb additions.

The effects of Mo and Nb additions on the microstructure and mechanical properties of two FeCrAl alloys were studied. Fine and uniform recrystallized grain structures (~ 20–30 μm) were achieved in both alloys through suitable annealing after warm-rolling. The formation of Fe 2 Nb-type Laves phase precipitates in the Nb-containing FeCrAl alloy effectively stabilized the deformed and recrystallized microstructures. The Mo-containing FeCrAl alloy exhibited strong γ texture fiber after annealing at 650–900 °C, whereas the annealed Nb-containing FeCrAl alloy had much weaker texture. Both strength and ductility decreased as the grain size increased in both alloys. [ABSTRACT FROM AUTHOR]