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Title: Microstructural analysis of steam oxidation of IN617 for use in ultra-supercritical steam plants
Authors: Gorman, David M.
Higginson, Rebecca L.
Du, H.
McColvin, G.
Fry, A.T.
Thomson, Rachel C.
Keywords: Microstructural analysis
Steam oxidation
IN617
Ultra-supercritical steam plants
Issue Date: 2012
Publisher: © Maney Publishing.
Citation: GORMAN, D.M. ... et al, 2012. Microstructural analysis of steam oxidation of IN617 for use in ultra-supercritical steam plants. Materials at High Temperatures, 29 (2), pp. 81 - 88.
Abstract: The microstructural evolution of IN617 subjected to oxidising atmospheres of 100% steam, 50% steam/argon and air in the temperature range 700-750oC for exposures times up to 4,000 h at atmospheric pressure has been investigated using a range of analytical electron microscopy techniques. It has been found that for this alloy the presence of steam in the atmosphere has an effect on the oxidation kinetics, and influences the nature of the scale. It has also been shown that there are differences in the volume and nature of voids formed, and that the voids are often associated with an internal structure of alumina. Significant internal oxidation was observed, particularly in the presence of steam, and a 3D reconstruction of the microstructure using FIBSEM techniques showed that this comprised of interconnected alumina plates which followed the grain boundaries into the substrate.
Description: This article was accepted for publication in the journal Materials at High Temperatures, http://www.maneyonline.com/mht. The definitive version is available at: http://www.maneyonline.com/doi/abs/10.1179/096034012X13313071300779
Sponsor: The authors would like to acknowledge financial support from both EPSRC [Grant No. EP/G037345/1] through the Doctoral Training Centre in Efficient Fossil Energy Technologies and Alstom Power Ltd.
Version: Accepted for publication
DOI: 10.3184/096034012X13313071300779
URI: https://dspace.lboro.ac.uk/2134/15325
Publisher Link: www.maneypublishing.com
ISSN: 0960-3409
Appears in Collections:Published Articles (Materials)

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