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Title: Alumina forming iron base superalloy

Abstract

An austenitic stainless steel alloy, consists essentially of, in weight percent 2.5 to 4 Al; 25 to 35 Ni; 12 to 19 Cr; at least 1, up to 4 total of at least one element selected from the group consisting of Nb and Ta; 0.5 to 3 Ti; less than 0.5 V; 0.1 to 1 of at least on element selected from the group consisting of Zr and Hf; 0.03 to 0.2 C; 0.005 to 0.1 B; and base Fe. The weight percent Fe is greater than the weight percent Ni. The alloy forms an external continuous scale including alumina, and contains coherent precipitates of .gamma.'-Ni.sub.3Al, and a stable essentially single phase FCC austenitic matrix microstructure. The austenitic matrix is essentially delta-ferrite-free and essentially BCC-phase-free.

Inventors:
; ;
Publication Date:
Research Org.:
ORNL (Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States))
Sponsoring Org.:
USDOE
OSTI Identifier:
1151771
Patent Number(s):
8,815,146
Application Number:
13/440,639
Assignee:
UT-Battelle, LLC (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Yamamoto, Yukinori, Muralidharan, Govindarajan, and Brady, Michael P. Alumina forming iron base superalloy. United States: N. p., 2014. Web.
Yamamoto, Yukinori, Muralidharan, Govindarajan, & Brady, Michael P. Alumina forming iron base superalloy. United States.
Yamamoto, Yukinori, Muralidharan, Govindarajan, and Brady, Michael P. Tue . "Alumina forming iron base superalloy". United States. doi:. https://www.osti.gov/servlets/purl/1151771.
@article{osti_1151771,
title = {Alumina forming iron base superalloy},
author = {Yamamoto, Yukinori and Muralidharan, Govindarajan and Brady, Michael P.},
abstractNote = {An austenitic stainless steel alloy, consists essentially of, in weight percent 2.5 to 4 Al; 25 to 35 Ni; 12 to 19 Cr; at least 1, up to 4 total of at least one element selected from the group consisting of Nb and Ta; 0.5 to 3 Ti; less than 0.5 V; 0.1 to 1 of at least on element selected from the group consisting of Zr and Hf; 0.03 to 0.2 C; 0.005 to 0.1 B; and base Fe. The weight percent Fe is greater than the weight percent Ni. The alloy forms an external continuous scale including alumina, and contains coherent precipitates of .gamma.'-Ni.sub.3Al, and a stable essentially single phase FCC austenitic matrix microstructure. The austenitic matrix is essentially delta-ferrite-free and essentially BCC-phase-free.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 26 00:00:00 EDT 2014},
month = {Tue Aug 26 00:00:00 EDT 2014}
}

Patent:

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