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Title: Overview of strategies for high-temperature creep and oxidation resistance of alumina-forming austenitic stainless steels

Abstract

A family of creep-resistant, alumina-forming austenitic (AFA) stainless steel alloys is under development for structural use in fossil energy conversion and combustion system applications. The AFA alloys developed to date exhibit comparable creep-rupture lives to state-of-the-art advanced austenitic alloys, and superior oxidation resistance in the {approx}923 K to 1173 K (650 C to 900 C) temperature range due to the formation of a protective Al{sub 2}O{sub 3} scale rather than the Cr{sub 2}O{sub 3} scales that form on conventional stainless steel alloys. This article overviews the alloy design approaches used to obtain high-temperature creep strength in AFA alloys via considerations of phase equilibrium from thermodynamic calculations as well as microstructure characterization. Strengthening precipitates under evaluation include MC-type carbides or intermetallic phases such as NiAl-B2, Fe{sub 2}(Mo,Nb)-Laves, Ni{sub 3}Al-L1{sub 2}, etc. in the austenitic single-phase matrix. Creep, tensile, and oxidation properties of the AFA alloys are discussed relative to compositional and microstructural factors.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org.:
FE USDOE - Office of Fossil Energy (FE); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1018576
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Metallurgical and Materials Transactions A
Additional Journal Information:
Journal Volume: 4; Journal Issue: 4; Journal ID: ISSN 1073--5623
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; CARBIDES; COMBUSTION; CREEP; DESIGN; ENERGY CONVERSION; EVALUATION; MICROSTRUCTURE; OXIDATION; STAINLESS STEELS; THERMODYNAMICS

Citation Formats

Yamamoto, Yukinori, Brady, Michael P, Santella, Michael L, Bei, Hongbin, Maziasz, Philip J, and Pint, Bruce A. Overview of strategies for high-temperature creep and oxidation resistance of alumina-forming austenitic stainless steels. United States: N. p., 2011. Web. doi:10.1007/s11661-010-0295-2.
Yamamoto, Yukinori, Brady, Michael P, Santella, Michael L, Bei, Hongbin, Maziasz, Philip J, & Pint, Bruce A. Overview of strategies for high-temperature creep and oxidation resistance of alumina-forming austenitic stainless steels. United States. doi:10.1007/s11661-010-0295-2.
Yamamoto, Yukinori, Brady, Michael P, Santella, Michael L, Bei, Hongbin, Maziasz, Philip J, and Pint, Bruce A. Sat . "Overview of strategies for high-temperature creep and oxidation resistance of alumina-forming austenitic stainless steels". United States. doi:10.1007/s11661-010-0295-2.
@article{osti_1018576,
title = {Overview of strategies for high-temperature creep and oxidation resistance of alumina-forming austenitic stainless steels},
author = {Yamamoto, Yukinori and Brady, Michael P and Santella, Michael L and Bei, Hongbin and Maziasz, Philip J and Pint, Bruce A},
abstractNote = {A family of creep-resistant, alumina-forming austenitic (AFA) stainless steel alloys is under development for structural use in fossil energy conversion and combustion system applications. The AFA alloys developed to date exhibit comparable creep-rupture lives to state-of-the-art advanced austenitic alloys, and superior oxidation resistance in the {approx}923 K to 1173 K (650 C to 900 C) temperature range due to the formation of a protective Al{sub 2}O{sub 3} scale rather than the Cr{sub 2}O{sub 3} scales that form on conventional stainless steel alloys. This article overviews the alloy design approaches used to obtain high-temperature creep strength in AFA alloys via considerations of phase equilibrium from thermodynamic calculations as well as microstructure characterization. Strengthening precipitates under evaluation include MC-type carbides or intermetallic phases such as NiAl-B2, Fe{sub 2}(Mo,Nb)-Laves, Ni{sub 3}Al-L1{sub 2}, etc. in the austenitic single-phase matrix. Creep, tensile, and oxidation properties of the AFA alloys are discussed relative to compositional and microstructural factors.},
doi = {10.1007/s11661-010-0295-2},
journal = {Metallurgical and Materials Transactions A},
issn = {1073--5623},
number = 4,
volume = 4,
place = {United States},
year = {2011},
month = {1}
}