Oxidation Behavior of ODS Fe-Cr Alloys

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Oxidation of Metals

DOI:https://doi.org/10.1007/s11085-004-3200-9· OSTI ID:1003151

Pint, Bruce A ^[1]; Wright, Ian G ^[1]

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1. ORNL

Four experimental oxide dispersion strengthened (ODS)Fe-(13-14 at. %)Cr ferritic alloys were exposed for up to 10,000 hr at 700--1100 C in air and in air with 10vol.% water vapor. Their performance has been compared to other commercial ODS and stainless steel alloys. At 700--800 C, the reaction rates in air were very low for all of the ODS Fe-Cr alloys compared to stainless steels. At 900 C, a Y{sub 2}O{sub 3} dispersion showed a distinct benefit in improving oxidation resistance compared to an Al{sub 2}O{sub 3} dispersion or no addition in the stainless steels. However, for the Fe-13 %Cr alloy, breakaway oxidation occurred after 7,000 hr at 900 C in air. Exposures in 10 % water vapor at 800 and 900 C and in air at 1000 and 1100 C showed increased attack for this class of alloys. Because of the relatively low Cr reservoirs in these alloys, their maximum operating temperature in air will be below 900 C.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: FE USDOE - Office of Fossil Energy (FE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1003151
• Journal Information: Oxidation of Metals, Journal Name: Oxidation of Metals Journal Issue: 2 Vol. 63; ISSN 1573-4889; ISSN 0030-770X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AIR
ALLOYS
BEHAVIOR
CHROMIUM
DISPERSIONS
FERRITIC STEELS
IRON BASE ALLOYS
OXIDATION
OXIDES
PERFORMANCE
REACTION KINETICS
STAINLESS STEELS
TEMPERATURE RANGE 1000-4000 K
WATER VAPOR
YTTRIUM OXIDES