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Title: Development of Creep-Resistant, Alumina-Forming Ferrous Alloys for High-Temperature Structural Use

Abstract

This paper overviews recent advances in developing novel alloy design concepts of creep-resistant, alumina-forming Fe-base alloys, including both ferritic and austenitic steels, for high-temperature structural applications in fossil-fired power generation systems. Protective, external alumina-scales offer improved oxidation resistance compared to chromia-scales in steam-containing environments at elevated temperatures. Alloy design utilizes computational thermodynamic tools with compositional guidelines based on experimental results accumulated in the last decade, along with design and control of the second-phase precipitates to maximize high-temperature strengths. The alloys developed to date, including ferritic (Fe-Cr-Al-Nb-W base) and austenitic (Fe-Cr-Ni-Al-Nb base) alloys, successfully incorporated the balanced properties of steam/water vapor-oxidation and/or ash-corrosion resistance and improved creep strength. Development of cast alumina-forming austenitic (AFA) stainless steel alloys is also in progress with successful improvement of higher temperature capability targeting up to ~1100°C. Current alloy design approach and developmental efforts with guidance of computational tools were found to be beneficial for further development of the new heat resistant steel alloys for various extreme environments.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1454397
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Name: ASME Proceedings, Elevated Temperature Design Methods; Conference: ASME Symposium on Elevated Temperature Applications of Materials for Fossil, Nuclear, and Petrochemical Industries (ETAM2018), Seattle, Washington, United States of America, 4/3/2018 8:00:00 AM-4/5/2018 8:00:00 AM; Related Information: Copyright © 2018 by ASME; public access
Country of Publication:
United States
Language:
English

Citation Formats

Yamamoto, Yukinori, Brady, Michael P., Muralidharan, Govindarajan, Pint, Bruce A., Maziasz, Philip J., Shin, Dongwon, Shassere, Benjamin, Babu, Sudarsanam Suresh, and Kuo, Chih-Hsiang. Development of Creep-Resistant, Alumina-Forming Ferrous Alloys for High-Temperature Structural Use. United States: N. p., 2018. Web. doi:10.1115/ETAM2018-6727.
Yamamoto, Yukinori, Brady, Michael P., Muralidharan, Govindarajan, Pint, Bruce A., Maziasz, Philip J., Shin, Dongwon, Shassere, Benjamin, Babu, Sudarsanam Suresh, & Kuo, Chih-Hsiang. Development of Creep-Resistant, Alumina-Forming Ferrous Alloys for High-Temperature Structural Use. United States. doi:10.1115/ETAM2018-6727.
Yamamoto, Yukinori, Brady, Michael P., Muralidharan, Govindarajan, Pint, Bruce A., Maziasz, Philip J., Shin, Dongwon, Shassere, Benjamin, Babu, Sudarsanam Suresh, and Kuo, Chih-Hsiang. Tue . "Development of Creep-Resistant, Alumina-Forming Ferrous Alloys for High-Temperature Structural Use". United States. doi:10.1115/ETAM2018-6727. https://www.osti.gov/servlets/purl/1454397.
@article{osti_1454397,
title = {Development of Creep-Resistant, Alumina-Forming Ferrous Alloys for High-Temperature Structural Use},
author = {Yamamoto, Yukinori and Brady, Michael P. and Muralidharan, Govindarajan and Pint, Bruce A. and Maziasz, Philip J. and Shin, Dongwon and Shassere, Benjamin and Babu, Sudarsanam Suresh and Kuo, Chih-Hsiang},
abstractNote = {This paper overviews recent advances in developing novel alloy design concepts of creep-resistant, alumina-forming Fe-base alloys, including both ferritic and austenitic steels, for high-temperature structural applications in fossil-fired power generation systems. Protective, external alumina-scales offer improved oxidation resistance compared to chromia-scales in steam-containing environments at elevated temperatures. Alloy design utilizes computational thermodynamic tools with compositional guidelines based on experimental results accumulated in the last decade, along with design and control of the second-phase precipitates to maximize high-temperature strengths. The alloys developed to date, including ferritic (Fe-Cr-Al-Nb-W base) and austenitic (Fe-Cr-Ni-Al-Nb base) alloys, successfully incorporated the balanced properties of steam/water vapor-oxidation and/or ash-corrosion resistance and improved creep strength. Development of cast alumina-forming austenitic (AFA) stainless steel alloys is also in progress with successful improvement of higher temperature capability targeting up to ~1100°C. Current alloy design approach and developmental efforts with guidance of computational tools were found to be beneficial for further development of the new heat resistant steel alloys for various extreme environments.},
doi = {10.1115/ETAM2018-6727},
journal = {ASME Proceedings, Elevated Temperature Design Methods},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2018},
month = {Tue May 01 00:00:00 EDT 2018}
}

Conference:
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