Cyclic-high temperature oxidation behavior of Fe-20Cr-4Al-S (748ppm) alloys with yttrium at 1673K

Abstract

The cyclic-high temperature oxidation behavior of Fe-20Cr-4Al (748ppmS: A), Fe-20Cr-4Al (702ppmS, 30ppmY: B), Fe-20Cr-4Al (645ppmS, 30ppmY: C), Fe-20Cr-4Al (382ppmS, 40ppmY: D) and Fe-20-Cr-4Al (73ppmS, 1700ppmY: E) alloys was studied in oxygen at 1673K during 5 cycles by mass change measurements, macro-morphology of oxidized surface of the alloys, X-ray diffraction and scanning electron microscopy. Mass changes of all the alloys increased with increasing number of cycles. The alloy E showed marked resistance for the cyclic-high temperature oxidation.