This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1016/j.msea.2011.03.112 in citations.
Effect of Laves Phase Strengthening on the Mechanical Properties of High Cr Ferritic Steels for Solid Oxide Fuel Cell Interconnect Application
Effect of Laves Phase Strengthening on the Mechanical Properties of High Cr Ferritic Steels for Solid Oxide Fuel Cell Interconnect Application
Two types of high chromium ferritic steels envisaged as construction materials for SOFC interconnects, were investigated in respect to microstructure and creep in the proposed application temperature range from 700 to 800 degrees C. The steel compositions mainly differed in the amounts of the Laves...
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Personal Name(s): | Kuhn, B. |
---|---|
Asensio, C. / Niewolak, L. / Hüttel, T. / Beck, T. / Hattendorf, H. / Singheiser, L. / Quadakkers, W.J. | |
Contributing Institute: |
Werkstoffstruktur und -eigenschaften; IEK-2 |
Published in: | Materials science and engineering / A, 528 (2011) S. 5888 - 5899 |
Imprint: |
Amsterdam
Elsevier
2011
|
Physical Description: |
5888 - 5899 |
DOI: |
10.1016/j.msea.2011.03.112 |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Materials Science and Engineering A
528 |
Subject (ZB): | |
Publikationsportal JuSER |
Two types of high chromium ferritic steels envisaged as construction materials for SOFC interconnects, were investigated in respect to microstructure and creep in the proposed application temperature range from 700 to 800 degrees C. The steel compositions mainly differed in the amounts of the Laves phase forming elements Nb, W and Si. The steel containing these alloying additions exhibited substantially higher creep resistance in the temperature range 700-800 degrees C than the high purity steel. The Laves phase formation occurred trans- as well as intragranular whereby the extent and size of grain boundary precipitates increased with increasing exposure time. Especially at 800 degrees C the precipitates inside the grains virtually completely vanished after longer exposure times and only intergranular precipitates remained. This change in precipitate morphology resulted especially at 800 degrees C in a decrease of creep resistance with increasing exposure time, although the Laves phase containing steel still exhibited higher creep strength than the high purity steel. (C) 2011 Elsevier B.V. All rights reserved. |