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01163 CYCLIC OXIDATION BEHAVIOR OF 800 SERIES CHROMIA-FORMING ALLOYS

Product Number: 51300-01163-SG
ISBN: 01163 2001 CP
Author: Bingtao Li and B. Gleeson
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The cyclic oxidation behavior of four commercial iron-base 800 series chromia-forming alloys was studied at 1000 °C in still air. Each thermal cycle consisted of one day at temperature followed by air- cooling to room temperature. Two different types of alloys were studied (800 and 800HT), with the alloys being supplied by two different producers. Although the alloys were of similar chemical composition, their variations in microstructure and minor constituent contents were apparently sufficiently different to cause marked differences in oxidation behavior. The 800HT alloys generally performed the worst, undergoing rapid weight-loss kinetics after a period of relatively protective oxidation. The time required for the commencement of rapid weight-loss kinetics depended significantly on the producer of the 800HT alloy. The oxidation behavior of the 800 alloys was also producer dependent, but not to the significant extent found for the 800HT alloys. Keywords: 800 series alloys, chromia-former, cyclic oxidation, scale spallation
The cyclic oxidation behavior of four commercial iron-base 800 series chromia-forming alloys was studied at 1000 °C in still air. Each thermal cycle consisted of one day at temperature followed by air- cooling to room temperature. Two different types of alloys were studied (800 and 800HT), with the alloys being supplied by two different producers. Although the alloys were of similar chemical composition, their variations in microstructure and minor constituent contents were apparently sufficiently different to cause marked differences in oxidation behavior. The 800HT alloys generally performed the worst, undergoing rapid weight-loss kinetics after a period of relatively protective oxidation. The time required for the commencement of rapid weight-loss kinetics depended significantly on the producer of the 800HT alloy. The oxidation behavior of the 800 alloys was also producer dependent, but not to the significant extent found for the 800HT alloys. Keywords: 800 series alloys, chromia-former, cyclic oxidation, scale spallation
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