Microstructure and room temperature tensile properties of Fe_3Al-based alloys with cerium addition

摘要

The effect of cerium addition to the Fe-28Al and Fe-28Al-2Cr alloys has been studied. Results show that suitable amount of cerium increases the ductility and strength at room temperature significantly. Further study shows that cerium addition modifies the compositions and structure of Fe_3Al oxide film, which restrains and retards the reaction of environmental water vapour on alu- minum. Also cerium addition causes the microstructure refinement and formation of cerium-rich precipitates.