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Title: Development of cast alumina-forming austenitic stainless steels

Abstract

Cast Fe-Ni-Cr chromia-forming austenitic stainless steels with Ni levels up to 45 wt. % are used at high temperatures in a wide range of industrial applications that demand microstructural stability, corrosion resistance, and creep strength. Although alumina scales offer better corrosion protection at these temperatures, designing cast austenitic alloys that form a stable alumina scale and achieve creep strength comparable to existing cast chromia-forming alloys is challenging. This work outlines the development of cast Fe-Ni-Cr-Al austenitic stainless steels containing about 25 wt. % Ni with good creep strength and the ability to form a protective alumina scale for use at temperatures up to 800 C - 850 C in H 2O-, S-, and C- containing environments. Creep properties of the best alloy were comparable to that of HK-type cast chromia-forming alloy along with improved oxidation resistance typical of alumina-forming alloys. Lastly, challenges in the design of cast alloys and a potential path to increasing the temperature capability are discussed.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1362187
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 68; Journal Issue: 11; Journal ID: ISSN 1047-4838
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; austenitic stainless steels; creep; casting; oxidation; alumina

Citation Formats

Muralidharan, G., Yamamoto, Y., Brady, M. P., Walker, L. R., Meyer III, H. M., and Leonard, D. N. Development of cast alumina-forming austenitic stainless steels. United States: N. p., 2016. Web. doi:10.1007/s11837-016-2094-8.
Muralidharan, G., Yamamoto, Y., Brady, M. P., Walker, L. R., Meyer III, H. M., & Leonard, D. N. Development of cast alumina-forming austenitic stainless steels. United States. doi:10.1007/s11837-016-2094-8.
Muralidharan, G., Yamamoto, Y., Brady, M. P., Walker, L. R., Meyer III, H. M., and Leonard, D. N. Tue . "Development of cast alumina-forming austenitic stainless steels". United States. doi:10.1007/s11837-016-2094-8. https://www.osti.gov/servlets/purl/1362187.
@article{osti_1362187,
title = {Development of cast alumina-forming austenitic stainless steels},
author = {Muralidharan, G. and Yamamoto, Y. and Brady, M. P. and Walker, L. R. and Meyer III, H. M. and Leonard, D. N.},
abstractNote = {Cast Fe-Ni-Cr chromia-forming austenitic stainless steels with Ni levels up to 45 wt. % are used at high temperatures in a wide range of industrial applications that demand microstructural stability, corrosion resistance, and creep strength. Although alumina scales offer better corrosion protection at these temperatures, designing cast austenitic alloys that form a stable alumina scale and achieve creep strength comparable to existing cast chromia-forming alloys is challenging. This work outlines the development of cast Fe-Ni-Cr-Al austenitic stainless steels containing about 25 wt. % Ni with good creep strength and the ability to form a protective alumina scale for use at temperatures up to 800 C - 850 C in H2O-, S-, and C- containing environments. Creep properties of the best alloy were comparable to that of HK-type cast chromia-forming alloy along with improved oxidation resistance typical of alumina-forming alloys. Lastly, challenges in the design of cast alloys and a potential path to increasing the temperature capability are discussed.},
doi = {10.1007/s11837-016-2094-8},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 11,
volume = 68,
place = {United States},
year = {Tue Sep 06 00:00:00 EDT 2016},
month = {Tue Sep 06 00:00:00 EDT 2016}
}

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Cited by: 2 works
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