Precipitation of α′ in neutron irradiated commercial FeCrAl alloys

• DOI: 10.1016/j.scriptamat.2017.08.022
• Publication Date: 2017-08-17T22:00:15Z
• Authors: Kevin G. Field; Kenneth C. Littrell; Samuel A. Briggs
• Keywords: Volume fraction

Abstract Alkrothal 720 and Kanthal APMT™, two commercial FeCrAl alloys, were neutron irradiated up to damage doses of 7.0 displacements per atom (dpa) in the temperature range of 320 to 382 °C to characterize the α′ precipitation in these alloys using small-angle neutron scattering. Both alloys exhibited α′ precipitation. Kanthal APMT™ exhibited higher number densities and volume fraction, a result attributed to its higher Cr content compared with Alkrothal 720. Trends observed as a function of damage dose (dpa) are consistent with literature trends for both FeCr and FeCrAl alloys.