Oxidation and Hot Corrosion of Some Advanced Superalloys at 1300 to 2000°F (704 to 1093°C)

Abstract

The cyclic oxidation resistance and the hot corrosion resistance of three single-crystal nickel-base superalloys and DS Mar M 200† are compared. The comparison is made by using burner rig oxidation tests at 2000°F (1093°C) and tube-furnace oxidation and hot-corrosion tests at 2000°F (1093°C), 1650°F (900°C) and 1300°F (704°C). The rig tests and the tube-furnace tests produce similiar results with the single-crystal alloys being more oxidation resistant than DS Mar M 200. A significant difference between the hot corrosion resistance of these alloys was not observed. All four alloys were extremely susceptible to hot corrosion induced by a liquid deposit.