Date of download: 7/8/2016 Copyright © ASME. All rights reserved. From: Creep Strength and Microstructure of AL20-25+Nb Alloy Sheets and Foils for Advanced Microturbine Recuperators J. Eng. Gas Turbines Power. 2006;129(3): doi: / Creep-rupture strain versus time data for various commercial heat-resistant alloy sheets and foils tested at 750°C and 100MPa (except for the PM2000 ODS alloy, tested at 120MPa) in air. Both alloy 625 and the PM2000 (ODS ferritic alloy) are still in-test. Figure Legend:

Date of download: 7/8/2016 Copyright © ASME. All rights reserved. From: Creep Strength and Microstructure of AL20-25+Nb Alloy Sheets and Foils for Advanced Microturbine Recuperators J. Eng. Gas Turbines Power. 2006;129(3): doi: / Creep data on commercial sheets and foils tested at 704°C and 152MPa in air. The sheet of alloy 625 has shown little creep at these conditions so far, and is still in-test. Figure Legend:

Date of download: 7/8/2016 Copyright © ASME. All rights reserved. From: Creep Strength and Microstructure of AL20-25+Nb Alloy Sheets and Foils for Advanced Microturbine Recuperators J. Eng. Gas Turbines Power. 2006;129(3): doi: / A plot of creep-rupture stress versus Larson-Miller parameter (LMP) for the various foils of commercial heat-resistant stainless steels, stainless alloys, and Ni-based superalloys tested at 650–750°C in air at ORNL Figure Legend:

Date of download: 7/8/2016 Copyright © ASME. All rights reserved. From: Creep Strength and Microstructure of AL20-25+Nb Alloy Sheets and Foils for Advanced Microturbine Recuperators J. Eng. Gas Turbines Power. 2006;129(3): doi: / Comparison of creep-strain versus time plots for creep-rupture testing of 10–15mil sheets of standard 347 stainless steel, and of AL20-25+Nb stainless alloy at 750°C and 100MPa in air. Differences in processing parameters produced coarser uniform grain size in the Phase 2 material compared to the Phase 1 material. Figure Legend:

Date of download: 7/8/2016 Copyright © ASME. All rights reserved. From: Creep Strength and Microstructure of AL20-25+Nb Alloy Sheets and Foils for Advanced Microturbine Recuperators J. Eng. Gas Turbines Power. 2006;129(3): doi: / Comparison of creep-strain versus time plots for creep-rupture testing of 3–5mil foils of standard 347 stainless steel, and of HR120 and AL20-25+Nb stainless alloys at 750°C and 100MPa in air. Differences in processing parameters of the AL20-25+Nb alloy produced a coarser uniform grain size in the Phase 2 material compared to the Phase 1 material. Figure Legend:

Date of download: 7/8/2016 Copyright © ASME. All rights reserved. From: Creep Strength and Microstructure of AL20-25+Nb Alloy Sheets and Foils for Advanced Microturbine Recuperators J. Eng. Gas Turbines Power. 2006;129(3): doi: / Optical metallographic micrographs showing the transverse cross-sections sheet specimens of sheets of AL20-25+Nb after creep- rupture testing at 750°C and 100MPa in air. The top sheet specimen is 15mil Phase 1 alloy, which ruptured after about 400h, while the bottom sheet is 10mil Phase 2 alloy, which ruptured after over 800h. The creep-rupture curves corresponding to these specimens are shown in Fig.. Figure Legend: