Abstract
Ferritic and austenitic model alloys with various contents of Cr and Ni ranging between 10-20% and 0-30%, respectively, were oxidized in air+10% water vapor during I hr cyclic oxidation at 650°C and 800°C. Depending on the alloy composition and temperature, either a thin protective oxide scale was observed or accelerated attack occurred which sometimes included spaollation. For austenitic model alloys, increasing either the Cr or Ni contents delayed the accelerated attack. For lower Cr and Ni contents at 800°C, accelerated attack, including spallation, occurred at short exposure times. No spallation was observed for the ferritic model alloys. However, accelerated attack can occur quickly with low Cr contents. Increasing the temperature delayed the breakaway observed on ferritic alloys whereas it reduced the protective-oxide-growth stage for austenitic alloys.
| Original language | English |
|---|---|
| Pages (from-to) | 463-483 |
| Number of pages | 21 |
| Journal | Oxidation of Metals |
| Volume | 61 |
| Issue number | 5-6 |
| DOIs | |
| State | Published - Jun 2004 |
Funding
The authors wish to thank: G. Garner, H. Longmire, J. W. Jones and J. Walker for their assistance with the experimental work. P. F. Tortorelli and I. G. Wright at ORNL reviewed this manuscript. This research is supported in part by an appointment to the Oak Ridge National Laboratory Postdoctoral Research Associates Program administered jointly by the Oak Ridge Institute for Science and Education and Oak Ridge National Laboratory, and sponsored by the Distributed Energy Resources Program, U.S. Department of Energy, under contract DE-AC05-00OR22725 with UT-Batelle, LLC.
| Funders | Funder number |
|---|---|
| Distributed Energy Resources Program | |
| U.S. Department of Energy | DE-AC05-00OR22725 |
| Oak Ridge National Laboratory | |
| Oak Ridge Institute for Science and Education |
Keywords
- Accelerated attack
- Austenitic stainless steels
- Breakaway oxidation
- Fe-Cr, Fe-Cr-Ni
- Ferritic stainless steels
- Spallation
- Water vapor