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Title: Cyclic-oxidation behavior of Fe-20Cr-4Al alloys with small amounts of sulfur at high temperatures

Abstract

The cyclic-oxidation behavior of Fe-20Cr-4Al alloys with 3, 35, 53, 104, and 171 ppm sulfur was studied in oxygen at 1,273, 1,373, 1,473, 1,573, and 1,673 K by mass-change measurements. X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron-probe microanalysis (EPMA). The cyclic oxidation consisted of an 18.0 ksec exposure that was repeated up to five times. Amounts of spalled oxides of the alloys with 35 and 53 ppm sulfur increased after one and two oxidation cycles, and then decreased after three or more oxidation cycles at 1,473 and 1,573 K. On the other hand, spalling of oxide scales on the alloys with 3 and 171 ppm sulfur was scarcely recognized after all cycles used in this study. SEM observations of both sides of the spalled oxides indicated that spallation was related to the morphology of the surface oxides and to the morphology and volume of cavities at the oxide-alloy interface.

Authors:
; ;
Publication Date:
Research Org.:
Shonan Inst. of Tech., Fujisawa (JP)
OSTI Identifier:
20050527
Resource Type:
Journal Article
Journal Name:
Oxidation of Metals
Additional Journal Information:
Journal Volume: 53; Journal Issue: 5-6; Other Information: PBD: Jun 2000; Journal ID: ISSN 0030-770X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; OXIDATION; IRON ALLOYS; CHROMIUM ALLOYS; ALUMINIUM ALLOYS; SULFUR ADDITIONS; TEMPERATURE RANGE 1000-4000 K; X-RAY DIFFRACTION; MICROSCOPY; SCALING; MORPHOLOGY

Citation Formats

Amano, Tadaaki, Watanabe, Toshiki, and Michiyama, Kaoru. Cyclic-oxidation behavior of Fe-20Cr-4Al alloys with small amounts of sulfur at high temperatures. United States: N. p., 2000. Web. doi:10.1023/A:1004676808576.
Amano, Tadaaki, Watanabe, Toshiki, & Michiyama, Kaoru. Cyclic-oxidation behavior of Fe-20Cr-4Al alloys with small amounts of sulfur at high temperatures. United States. doi:10.1023/A:1004676808576.
Amano, Tadaaki, Watanabe, Toshiki, and Michiyama, Kaoru. Thu . "Cyclic-oxidation behavior of Fe-20Cr-4Al alloys with small amounts of sulfur at high temperatures". United States. doi:10.1023/A:1004676808576.
@article{osti_20050527,
title = {Cyclic-oxidation behavior of Fe-20Cr-4Al alloys with small amounts of sulfur at high temperatures},
author = {Amano, Tadaaki and Watanabe, Toshiki and Michiyama, Kaoru},
abstractNote = {The cyclic-oxidation behavior of Fe-20Cr-4Al alloys with 3, 35, 53, 104, and 171 ppm sulfur was studied in oxygen at 1,273, 1,373, 1,473, 1,573, and 1,673 K by mass-change measurements. X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron-probe microanalysis (EPMA). The cyclic oxidation consisted of an 18.0 ksec exposure that was repeated up to five times. Amounts of spalled oxides of the alloys with 35 and 53 ppm sulfur increased after one and two oxidation cycles, and then decreased after three or more oxidation cycles at 1,473 and 1,573 K. On the other hand, spalling of oxide scales on the alloys with 3 and 171 ppm sulfur was scarcely recognized after all cycles used in this study. SEM observations of both sides of the spalled oxides indicated that spallation was related to the morphology of the surface oxides and to the morphology and volume of cavities at the oxide-alloy interface.},
doi = {10.1023/A:1004676808576},
journal = {Oxidation of Metals},
issn = {0030-770X},
number = 5-6,
volume = 53,
place = {United States},
year = {2000},
month = {6}
}