Alumina-forming austenitic (AFA) steels represent a new class of corrosion- and creep-resistant austenitic steels designed to enable higher temperature recuperators. Field trials are in progress for commercially rolled foil with widths over 39 cm. The first trial completed 3000 hrs in a microturbine recuperator with an elevated turbine inlet temperature and showed limited degradation. A longer microturbine trial is in progress. A third exposure in a larger turbine has passed 16,000 hrs. To reduce alloy cost and address foil fabrication issues with the initial AFA composition, several new AFA compositions are being evaluated in creep and laboratory oxidation testing at 650–800 °C and the results compared to commercially fabricated AFA foil and conventional recuperator foil performance.
Issue Section:
Gas Turbines: Industrial and Cogeneration
Topics:
Alloys,
Creep,
Engines,
Oxidation,
Temperature,
Testing,
Turbines,
Microturbines,
Manufacturing
References
1.
Maidment
, G. G.
, and Tozer
, R. M.
, 2002
, “Combined Cooling Heat and Power in Supermarkets
,” Appl. Therm Eng.
, 22
(6
), pp. 653
–665
.2.
Alanne
, K.
, and Saari
, A.
, 2004
, “Sustainable Small-Scale CHP Technologies for Buildings: The Basis for Multi-Perspective Decision-Making
,” Renewable Sustainable Energy Rev.
, 8
(5
), pp. 401
–431
.3.
Kuhn
, V.
, Klemes
, J.
, and Bulatov
, I.
, 2008
, “MicroCHP: Overview of Selected Technologies, Products and Field Test Results
,” Appl. Therm. Eng.
, 28
(16
), pp. 2039
–2048
.4.
Chicco
, G.
, and Mancarella
, P.
, 2009
, “Distributed Multi-Generation: A Comprehensive View
,” Renewable Sustainable Energy Rev.
, 13
(3
), pp. 535
–551
.5.
Watts
, J. H.
, 1999
, “Microturbines: A New Class of Gas Turbine Engine
,” Global Gas Turbine News
, 39
(1
), pp. 4
–8
.6.
Hamilton
, S. L.
, 2003
, The Handbook of Microturbine Generators
, PennWell
, Tulsa, OK
.7.
Gillette
, S.
, 2010
, “Microturbine Technology Matures
,” Power
, 154
(11
), pp. 52
–53
.8.
McDonald
, C. F.
, and Wilson
, D. G.
, 1996
, “The Utilization of Recuperated and Regenerated Engine Cycles for High-Efficiency Gas Turbines in the 21st Century
,” Appl. Therm. Eng.
, 16
(8–9), pp. 635
–653
.9.
Omatete
, O.
, Maziasz
, P. J.
, Pint
, B. A.
, and Stinton
, D. P.
, 2000
, “Recuperators for Advanced Microturbines
,” Oak Ridge National Laboratory, Oak Ridge, TN, Report No. ORNL/TM-2000/304.10.
Kesseli
, J.
, Wolf
, T.
, Nash
, J.
, and Freedman
, S.
, 2003
, “Micro, Industrial, and Advanced Gas Turbines Employing Recuperators
,” ASME
Paper No. GT2003-38938.11.
Pint
, B. A.
, and Rakowski
, J. M.
, 2000
, “Effect of Water Vapor on the Oxidation Resistance of Stainless Steels
,” NACE
Corrosion 2000, Orlando, FL, Mar. 26–31, NACE Paper No. 00-259.12.
Asteman
, H.
, Svensson
, J.-E.
, Norell
, M.
, and Johansson
, L.-G.
, 2000
, “Influence of Water Vapor and Flow Rate on the High-Temperature Oxidation of 304L; Effect of Chromium Oxide Hydroxide Evaporation
,” Oxid. Met.
, 54
(1), pp. 11
–26
.13.
Opila
, E. J.
, 2004
, “Volatility of Common Protective Oxides in High-Temperature Water Vapor: Current Understanding and Unanswered Questions
,” Mater. Sci. Forum
, 461–464
, pp. 765
–774
.14.
Pint
, B. A.
, 2005
, “The Effect of Water Vapor on Cr Depletion in Advanced Recuperator Alloys
,” ASME
Paper No. GT2005-68495.15.
Young
, D. J.
, and Pint
, B. A.
, 2006
, “Chromium Volatilization Rates From Cr2O3 Scales Into Flowing Gases Containing Water Vapor
,” Oxid. Met.
, 66
(3), pp. 137
–153
.16.
Pint
, B. A.
, 2006
, “Stainless Steels With Improved Oxidation Resistance for Recuperators
,” ASME J. Eng. Gas Turbines Power
, 128
(2
), pp. 370
–376
.17.
Matthews
, W. J.
, More
, K. L.
, and Walker
, L. R.
, 2007
, “Accelerated Oxidation of Type 347 Stainless Steel Primary Surface Recuperators Operating Above 650 °C
,” ASME
Paper No. GT2007-27916.18.
Pint
, B. A.
, More
, K. L.
, Trejo
, R.
, and Lara-Curzio
, E.
, 2008
, “Comparison of Recuperator Alloy Degradation in Laboratory and Engine Testing
,” ASME J. Eng. Gas Turbines Power
, 130
(1
), p. 012101
.19.
Rakowski
, J. M.
, Stinner
, C. P.
, Lipschutz
, M.
, and Montague
, J. P.
, “Metallic Alloys for Primary Surface Recuperators
,” ASME
Paper No. GT2006-90680.20.
Matthews
, W. J.
, More
, K. L.
, and Walker
, L. R.
, 2009
, “Comparison of Three Microturbine Primary Surface Recuperators
,” ASME
Paper No. GT2009-59041.21.
Bender
, M. D.
, and Klug
, R. C.
, 2014
, “Comparison of Ni-Based 625 Alloy and ATI 20-25+Nb™ Stainless Steel Foils After Long-Term Exposure to Gas Turbine Engine Exhaust
,” ASME
Paper No. GT2014-25334.22.
Pint
, B. A.
, Dryepondt
, S.
, Rouaix-Vande Put
, A.
, and Zhang
, Y.
, 2012
, “Mechanistic-Based Lifetime Predictions for High Temperature Alloys and Coatings
,” JOM
, 64
(12
), pp. 1454
–1460
.23.
Pint
, B. A.
, Unocic
, K. A.
, and Dryepondt
, S.
, 2010
, “Oxidation of Superalloys in Extreme Environments
,” 7th International Symposium on Superalloy 718 and Derivatives
, E. A.
Ott
, J. R.
Groh
, A.
Banik
, I.
Dempster
, T. P.
Gabb
, R.
Helmink
, X.
Liu
, A.
Mitchell
, G. P.
Sjoberg
, and A.
Wusatowska-Sarnek
, eds., TMS, Warrendale, PA, pp. 861
–875
.24.
Yamamoto
, Y.
, Brady
, M. P.
, Lu
, Z. P.
, Maziasz
, P. J.
, Liu
, C. T.
, Pint
, B. A.
, More
, K. L.
, Meyer
, H. M.
, and Payzant
, E. A.
, 2007
, “Creep-Resistant, Al2O3-Forming Austenitic Stainless Steels
,” Science
, 316
(5823
), pp. 433
–436
.25.
Pint
, B. A.
, Shingledecker
, J. P.
, Brady
, M. P.
, and Maziasz
, P. J.
, 2007
, “Alumina-Forming Austenitic Alloys for Advanced Recuperators
,” ASME
Paper No. GT2007-27916.26.
Brady
, M. P.
, Yamamoto
, Y.
, Santella
, M. L.
, Maziasz
, P. J.
, Pint
, B. A.
, Liu
, C. T.
, Lu
, Z. P.
, and Bei
, H.
, 2008
, “The Development of Alumina-Forming Austenitic Stainless Steels for High-Temperature Structural Use
,” JOM
, 60
(7
), pp. 12
–18
.27.
Pint
, B. A.
, Brady
, M. P.
, Yamamoto
, Y.
, Santella
, M. L.
, Maziasz
, P. J.
, and Matthews
, W. J.
, 2011
, “Evaluation of Alumina-Forming Austenitic Foil for Advanced Recuperators
,” ASME J. Eng. Gas Turbines Power
, 133
(10
), p. 102302
.28.
Pint
, B. A.
, Brady
, M. P.
, Yamamoto
, Y.
, Unocic
, K. A.
, and Matthews
, W. J.
, 2011
, “Evaluation of Commercial Alumina-Forming Austenitic Foil for Advanced Recuperators
,” ASME
Paper No. GT2011-46704.29.
Yamamoto
, Y.
, Brady
, M. P.
, Santella
, M. L.
, Bei
, H.
, Maziasz
, P. J.
, and Pint
, B. A.
, 2011
, “Alloy Design Concept for High-Temperature Creep Resistance of Alumina-Forming Austenitic Stainless Steels
,” Metall. Mater. Trans. A
, 42
(4
), pp. 922
–931
.30.
Pint
, B. A.
, Dryepondt
, S.
, Brady
, M. P.
, and Yamamoto
, Y.
, 2013
, “Evaluation of Commercial and Next Generation Alumina-Forming Austenitic Foil for Advanced Recuperators
,” ASME
Paper No. GT2013-94940.31.
Yamamoto
, Y.
, Santella
, M. L.
, Brady
, M. P.
, Bei
, H.
, and Maziasz
, P. J.
, 2009
, “Effect of Alloying Additions on Phase Equilibria and Creep Resistance of Alumina-Forming Austenitic Stainless Steels
,” Metall. Mater. Trans. A
, 40
(8
), pp. 1868
–1880
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