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Title: Oxidation resistant high creep strength austenitic stainless steel

Abstract

An austenitic stainless steel displaying high temperature oxidation and creep resistance has a composition that includes in weight percent 15 to 21 Ni, 10 to 15 Cr, 2 to 3.5 Al, 0.1 to 1 Nb, and 0.05 to 0.15 C, and that is free of or has very low levels of N, Ti and V. The alloy forms an external continuous alumina protective scale to provide a high oxidation resistance at temperatures of 700 to 800.degree. C. and forms NbC nanocarbides and a stable essentially single phase fcc austenitic matrix microstructure to give high strength and high creep resistance at these temperatures.

Inventors:
; ; ; ; ;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176399
Patent Number(s):
7744813
Application Number:
11/619,944
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Brady, Michael P., Pint, Bruce A., Liu, Chain-Tsuan, Maziasz, Philip J., Yamamoto, Yukinori, and Lu, Zhao P. Oxidation resistant high creep strength austenitic stainless steel. United States: N. p., 2010. Web.
Brady, Michael P., Pint, Bruce A., Liu, Chain-Tsuan, Maziasz, Philip J., Yamamoto, Yukinori, & Lu, Zhao P. Oxidation resistant high creep strength austenitic stainless steel. United States.
Brady, Michael P., Pint, Bruce A., Liu, Chain-Tsuan, Maziasz, Philip J., Yamamoto, Yukinori, and Lu, Zhao P. Tue . "Oxidation resistant high creep strength austenitic stainless steel". United States. https://www.osti.gov/servlets/purl/1176399.
@article{osti_1176399,
title = {Oxidation resistant high creep strength austenitic stainless steel},
author = {Brady, Michael P. and Pint, Bruce A. and Liu, Chain-Tsuan and Maziasz, Philip J. and Yamamoto, Yukinori and Lu, Zhao P.},
abstractNote = {An austenitic stainless steel displaying high temperature oxidation and creep resistance has a composition that includes in weight percent 15 to 21 Ni, 10 to 15 Cr, 2 to 3.5 Al, 0.1 to 1 Nb, and 0.05 to 0.15 C, and that is free of or has very low levels of N, Ti and V. The alloy forms an external continuous alumina protective scale to provide a high oxidation resistance at temperatures of 700 to 800.degree. C. and forms NbC nanocarbides and a stable essentially single phase fcc austenitic matrix microstructure to give high strength and high creep resistance at these temperatures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {6}
}

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