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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.
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Levy et al. (1989) studied this question.
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