LONG-TERM PERFORMANCE OF HIGH TEMPERATURE ALLOYS IN OXIDIZING ENVIRONMENTS AND SUPERCRITICAL CO2

V. P. Deodeshmukh, B. A. Pint

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

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.

Original languageEnglish
Title of host publicationJoint 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
EditorsJohn Shingledecker, Masao Takeyama
PublisherASM International
Pages953-966
Number of pages14
ISBN (Electronic)9781627082716
DOIs
StatePublished - 2019
EventJoint 9th International Conference on Advances in Materials Technology for Fossil Power Plants, EPRI 2019 and the 2nd International 123HiMAT Conference on High-Temperature Materials - Nagasaki, Japan
Duration: Oct 21 2019Oct 24 2019

Publication series

NameJoint 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

Conference

ConferenceJoint 9th International Conference on Advances in Materials Technology for Fossil Power Plants, EPRI 2019 and the 2nd International 123HiMAT Conference on High-Temperature Materials
Country/TerritoryJapan
CityNagasaki
Period10/21/1910/24/19

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