This title appears in the Scientific Report :
2005
Please use the identifier:
http://dx.doi.org/10.1002/maco.200503920 in citations.
Steam Oxidation and its Potential Effects on Creep Strength of Power Station Materials
Steam Oxidation and its Potential Effects on Creep Strength of Power Station Materials
The oxidation behaviour of several commercial alloys in simulated steam was investigated and compared with that of model alloys with systematic variations of selected alloying elements in the temperature range of 550 degrees C to 650 degrees C. Also, creep tests of specimens pre-oxidized in steam or...
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Personal Name(s): | Nieto, L. |
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Rohr, V. / Ennis, P. J. / Schütze, M. / Quadakkers, W. J. | |
Contributing Institute: |
Werkstoffstruktur und Eigenschaften; IWV-2 |
Published in: | Materials and corrosion, 56 (2005) S. 890 - 896 |
Imprint: |
Weinheim [u.a.]
Wiley-VCH
2005
|
Physical Description: |
890 - 896 |
DOI: |
10.1002/maco.200503920 |
Document Type: |
Journal Article |
Research Program: |
Werkstoffsysteme für Kraftwerke |
Series Title: |
Materials and Corrosion
56 |
Subject (ZB): | |
Publikationsportal JuSER |
The oxidation behaviour of several commercial alloys in simulated steam was investigated and compared with that of model alloys with systematic variations of selected alloying elements in the temperature range of 550 degrees C to 650 degrees C. Also, creep tests of specimens pre-oxidized in steam or in flue gas were carried out in order to study the interaction between creep and corrosion. The corrosion products were characterised by optical microscopy, XRD, SEM/ EDX and Raman spectroscopy. It was found that the oxidation resistance of the materials increased with increasing chromium content. High chromium materials exhibited the best oxidation behaviour, whereas the low chromium materials formed thick, multilayered oxide scales, prone to spallation. Anomalous temperature dependences were found in materials with intermediate chromium contents. Creep tests showed a significant reduction in the creep strength of both alloys was caused by a 1000 h thermal exposure treatment at 650 degrees C for P92 and at 800 degrees C for Alloy 800. An additional, though much smaller reduction in strength was observed for the specimens that had been oxidized for 1000 h at 650 or 800 degrees C prior to testing. Further testing is required for confirmation of this effect. |