Effect of Al and Cr on Oxidation of Fe-Al and Fe-Cr Alloys

Abstract

The effects of Cr and Al contents m Fe Al and Fe Cr alloys on oxidation resistance, hardness, and the thermal expansion coefficient were investigated Fe Al and Fe Cr alloys above 10wt %Al and 20wt %Cr contents have a high oxidation resistance The hardness of the Fe Al and Fe Cr alloys increased with an increase in Al and Cr contents due to solid solution or formation of an intermetallic compound The coefficients of thermal expansion of the Fe Al alloys were higher than those of the Fe Cr alloys because the coefficient of thermal expansion of Al was higher than that of Fe and Cr