Overview of Strategies for High-Temperature Creep and Oxidation Resistance of Alumina-Forming Austenitic Stainless Steels

被引：154
|
作者：
Yamamoto, Y. [1 ]
Brady, M. P. [1 ]
Santella, M. L. [1 ]
Bei, H. [1 ]
Maziasz, P. J. [1 ]
Pint, B. A. [1 ]
机构：
[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2011年 / 42A卷 / 04期
基金：
美国能源部;
关键词：
COAL POWER-PLANTS; SCALE FORMATION; BEHAVIOR; ALLOYS; PERFORMANCE; ADDITIONS; MECHANISM; VAPOR; PHASE;
D O I：
10.1007/s11661-010-0295-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 similar to 923 K to 1173 K (650 A degrees C to 900 A degrees C) temperature range due to the formation of a protective Al2O3 scale rather than the Cr2O3 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-2(Mo,Nb)-Laves, Ni3Al-L1(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.
引用
收藏
页码：922 / 931
页数：10
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