Void formation during cyclic oxidation of oxide dispersion strengthened FeCrAl alloys
Abstract
Here, oxide dispersion strengthened FeCrAl alloys are considered for various high-temperature applications due to their excellent mechanical properties and oxidation resistance, but void formation is a concern for component durability. Cyclic oxidation testing was conducted on alloy MA956 and PM2000 at 1100–1200ºC for durations of up to 10,000 h and the void content was determined from optical cross-sections by image analysis. At 1100ºC, 100 h cycle, the low void concentrations measured were consistent with two competing mechanisms proposed in the literature: coalescence of process-induced nano-voids and alloy sintering. At 1200ºC using 1 h cycles, the void concentration was much higher, reaching ~3% to 6% for specimens tested to breakaway oxidation. The void growth was attributed to the high oxidation rates and the annihilation of oxidation-induced vacancies at the surface of the process-induced voids.
- Authors:
-
[1];
[2];
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- Northern Arizona Univ., Flagstaff, AZ (United States). Center for Bioengineering Innovation
- Univ. of Liverpool (United Kingdom). School of Engineering
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1658014
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials at High Temperatures
- Additional Journal Information:
- Journal Name: Materials at High Temperatures; Journal ID: ISSN 0960-3409
- Publisher:
- Maney Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- CO2; cyclic oxidation; H2O; image analysis; ODS FeCrAl; void formation
Citation Formats
Dryepondt, Sebastien, Thiesing, Benjamin P., Tatlock, Gordon J., and Jones, Andy R. Void formation during cyclic oxidation of oxide dispersion strengthened FeCrAl alloys. United States: N. p., 2020.
Web. doi:10.1080/09603409.2020.1771657.
Dryepondt, Sebastien, Thiesing, Benjamin P., Tatlock, Gordon J., & Jones, Andy R. Void formation during cyclic oxidation of oxide dispersion strengthened FeCrAl alloys. United States. https://doi.org/10.1080/09603409.2020.1771657
Dryepondt, Sebastien, Thiesing, Benjamin P., Tatlock, Gordon J., and Jones, Andy R. Thu .
"Void formation during cyclic oxidation of oxide dispersion strengthened FeCrAl alloys". United States. https://doi.org/10.1080/09603409.2020.1771657. https://www.osti.gov/servlets/purl/1658014.
@article{osti_1658014,
title = {Void formation during cyclic oxidation of oxide dispersion strengthened FeCrAl alloys},
author = {Dryepondt, Sebastien and Thiesing, Benjamin P. and Tatlock, Gordon J. and Jones, Andy R.},
abstractNote = {Here, oxide dispersion strengthened FeCrAl alloys are considered for various high-temperature applications due to their excellent mechanical properties and oxidation resistance, but void formation is a concern for component durability. Cyclic oxidation testing was conducted on alloy MA956 and PM2000 at 1100–1200ºC for durations of up to 10,000 h and the void content was determined from optical cross-sections by image analysis. At 1100ºC, 100 h cycle, the low void concentrations measured were consistent with two competing mechanisms proposed in the literature: coalescence of process-induced nano-voids and alloy sintering. At 1200ºC using 1 h cycles, the void concentration was much higher, reaching ~3% to 6% for specimens tested to breakaway oxidation. The void growth was attributed to the high oxidation rates and the annihilation of oxidation-induced vacancies at the surface of the process-induced voids.},
doi = {10.1080/09603409.2020.1771657},
journal = {Materials at High Temperatures},
number = ,
volume = ,
place = {United States},
year = {Thu Jun 04 00:00:00 EDT 2020},
month = {Thu Jun 04 00:00:00 EDT 2020}
}
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