The Oak Ridge National Laboratory (ORNL) and ATI Allegheny Ludlum worked together on a collaborative program for about two years to produce a wide range of commercial sheets and foils of the new AL20-25+ (AL20–25+Nb) stainless alloy for advanced microturbine recuperator applications. There is a need for cost-effective sheets/foils with more performance and reliability at 650–750°C than 347 stainless steel, particularly for larger 200–250 kW microturbines. Phase 1 of this collaborative program produced the sheets and foils needed for manufacturing brazed plated-fin air cells, while Phase 2 provided foils for primary surface air cells, and did experiments on modified processing designed to change the microstructure of sheets and foils for improved creep-resistance. Phase 1 sheets and foils of AL20-25+Nb have much more creep-resistance than 347 steel at 700–750°C, and those foils are slightly stronger than HR120 and HR230. Results for Phase 2 showed nearly double the creep-rupture life of sheets at 750°C/100 MPa, and similar improvements in foils. Creep data show that Phase 2 foils of AL20-25+Nb alloy have creep resistance approaching that of alloy 625 foils. Testing at about 750°C in flowing turbine exhaust gas for 500 h in the ORNL Recuperator Test Facility shows that foils of AL20–25+Nb alloy have oxidation-resistance similar to HR120 alloy, and much better than 347 steel.
Skip Nav Destination
Article navigation
July 2007
Technical Papers
Creep Strength and Microstructure of Alloy Sheets and Foils for Advanced Microturbine Recuperators
J. P. Shingledecker,
J. P. Shingledecker
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
Search for other works by this author on:
N. D. Evans,
N. D. Evans
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
Search for other works by this author on:
Y. Yamamoto,
Y. Yamamoto
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
Search for other works by this author on:
K. L. More,
K. L. More
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
Search for other works by this author on:
R. Trejo,
R. Trejo
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
Search for other works by this author on:
E. Lara-Curzio
E. Lara-Curzio
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
Search for other works by this author on:
P. J. Maziasz
J. P. Shingledecker
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
N. D. Evans
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
Y. Yamamoto
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
K. L. More
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
R. Trejo
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115
E. Lara-Curzio
Oak Ridge National Laboratory
, P.O. Box 2008, Oak Ridge, TN 37831-6115J. Eng. Gas Turbines Power. Jul 2007, 129(3): 798-805 (8 pages)
Published Online: October 20, 2006
Article history
Received:
October 6, 2006
Revised:
October 20, 2006
Citation
Maziasz, P. J., Shingledecker, J. P., Evans, N. D., Yamamoto, Y., More, K. L., Trejo, R., and Lara-Curzio, E. (October 20, 2006). "Creep Strength and Microstructure of Alloy Sheets and Foils for Advanced Microturbine Recuperators." ASME. J. Eng. Gas Turbines Power. July 2007; 129(3): 798–805. https://doi.org/10.1115/1.2718569
Download citation file:
Get Email Alerts
Cited By
Image-based flashback detection in a hydrogen-fired gas turbine using a convolutional autoencoder
J. Eng. Gas Turbines Power
Fuel Thermal Management and Injector Part Design for LPBF Manufacturing
J. Eng. Gas Turbines Power
An investigation of a multi-injector, premix/micromix burner burning pure methane to pure hydrogen
J. Eng. Gas Turbines Power
Related Articles
Overview of Creep Strength and Oxidation of Heat-Resistant Alloy Sheets and Foils for Compact Heat Exchangers
J. Turbomach (October,2006)
Comparison of Three Microturbine Primary Surface Recuperator Alloys
J. Eng. Gas Turbines Power (February,2010)
Evaluation of Alumina-Forming Austenitic Foil for Advanced Recuperators
J. Eng. Gas Turbines Power (October,2011)
High-Temperature Performance of Cast CF8C-Plus Austenitic Stainless Steel
J. Eng. Gas Turbines Power (September,2011)
Related Proceedings Papers
Related Chapters
E110opt Fuel Cladding Corrosion under PWR Conditions
Zirconium in the Nuclear Industry: 20th International Symposium
Mixed Mode Fracture Toughness Testing of Hydrogen-Charged 21Cr-6Ni-9Mn Stainless Steel and 2219 Aluminum
International Hydrogen Conference (IHC 2016): Materials Performance in Hydrogen Environments
Part 2, Section II—Materials and Specifications
Companion Guide to the ASME Boiler and Pressure Vessel Codes, Volume 1, Fifth Edition