High-temperature stress-rupture properties of a ferritic steel for solid oxide fuel cell interconnect

Yung Tang Chiu, Chih Kuang Lin

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

3 Scopus citations

Abstract

The high-temperature stress-rupture properties of a ferritic steel (Crofer 22 H) for use as an interconnect material in planar solid oxide fuel cells are investigated. Constant-load creep tests are carried out at 650 to 800°C For a given applied stress, the creep rupture time is decreased with an increase in temperature. The creep rupture time is well correlated with the applied stress by a simple power law for each testing temperature. The fitted power-law curves of 650-750 °C look somewhat parallel to each other while the curve of 800°C is steeper than the others. A greater reduction of creep strength in the long-life region is present at 800°C Larson-Miller relationship also does well in correlating the creep rupture time with applied stress and temperature. Fractographic and microstructural observations indicate such a significant reduction of creep strength in the long-life region at 800 °C can be partially attributed to a precipitate coarsening effect.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 12, SOFC XII
Pages2581-2590
Number of pages10
Edition3 PART 3
DOIs
StatePublished - 2011
Event12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting - Montreal, QC, Canada
Duration: 1 May 20116 May 2011

Publication series

NameECS Transactions
Number3 PART 3
Volume35
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting
Country/TerritoryCanada
CityMontreal, QC
Period1/05/116/05/11

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