TY - GEN
T1 - LONG-TERM PERFORMANCE OF HIGH TEMPERATURE ALLOYS IN OXIDIZING ENVIRONMENTS AND SUPERCRITICAL CO2
AU - Deodeshmukh, V. P.
AU - Pint, B. A.
N1 - Publisher Copyright:
© 2019 ASM International® All rights reserved.
PY - 2019
Y1 - 2019
N2 - Long-term performance of high temperature alloys is critically linked to the oxidation behavior in power generation applications in wet air and steam. As power generation systems move towards higher efficiency operation, next-generation fossil, nuclear and concentrating solar power plants are considering supercritical CO2 cycle above 700°C. Wrought solid solution strengthened and precipitations strengthened alloys are leading candidates for both steam and Supercritical CO2 power cycles. This study evaluates the cyclic oxidation behavior of HAYNES® 230®, 282®, and 625 alloys in wet air, flowing laboratory air, steam and in 1 and 300 bar Supercritical CO2 at ~750oC for duration of 1000 -10,000h. Test samples were thermally cycled for various times at temperature followed by cooling to room temperature. Alloy performances were assessed by analyzing the weight change behavior and extent of attack. The results clearly demonstrated the effects of alloy composition and environment on the long-term cyclic oxidation resistance. The extents of attack varied from alloy to alloy but none of the alloys underwent catastrophic corrosion and no significant internal carburization was observed in supercritical CO2. The performance of these alloys indicates that these materials are compatible not only in oxidizing environments, but also in Supercritical CO2 environments for extended service operation.
AB - Long-term performance of high temperature alloys is critically linked to the oxidation behavior in power generation applications in wet air and steam. As power generation systems move towards higher efficiency operation, next-generation fossil, nuclear and concentrating solar power plants are considering supercritical CO2 cycle above 700°C. Wrought solid solution strengthened and precipitations strengthened alloys are leading candidates for both steam and Supercritical CO2 power cycles. This study evaluates the cyclic oxidation behavior of HAYNES® 230®, 282®, and 625 alloys in wet air, flowing laboratory air, steam and in 1 and 300 bar Supercritical CO2 at ~750oC for duration of 1000 -10,000h. Test samples were thermally cycled for various times at temperature followed by cooling to room temperature. Alloy performances were assessed by analyzing the weight change behavior and extent of attack. The results clearly demonstrated the effects of alloy composition and environment on the long-term cyclic oxidation resistance. The extents of attack varied from alloy to alloy but none of the alloys underwent catastrophic corrosion and no significant internal carburization was observed in supercritical CO2. The performance of these alloys indicates that these materials are compatible not only in oxidizing environments, but also in Supercritical CO2 environments for extended service operation.
UR - http://www.scopus.com/inward/record.url?scp=85139744199&partnerID=8YFLogxK
U2 - 10.31339/asm.cp.am-epri-2019p0953
DO - 10.31339/asm.cp.am-epri-2019p0953
M3 - Conference contribution
AN - SCOPUS:85139744199
T3 - Joint EPRI-123HiMAT International Conference on Advances in High-Temperature Materials - Proceedings from EPRI's 9th International Conference on Advances in Materials Technology for Fossil Power Plants and the 2nd International 123HiMAT Conference on High-Temperature Materials
SP - 953
EP - 966
BT - Joint EPRI-123HiMAT International Conference on Advances in High-Temperature Materials - Proceedings from EPRI's 9th International Conference on Advances in Materials Technology for Fossil Power Plants and the 2nd International 123HiMAT Conference on High-Temperature Materials
A2 - Shingledecker, John
A2 - Takeyama, Masao
PB - ASM International
T2 - Joint 9th International Conference on Advances in Materials Technology for Fossil Power Plants, EPRI 2019 and the 2nd International 123HiMAT Conference on High-Temperature Materials
Y2 - 21 October 2019 through 24 October 2019
ER -