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Electromagnetic evaluation of the microstructure of grade 91 tubes/pipes

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Liu, Jun, Wilson, John, Strangwood, Martin, Davis, Claire, Peyton, A. J. and Parker, Jonathan (2015) Electromagnetic evaluation of the microstructure of grade 91 tubes/pipes. International Journal of Pressure Vessels and Piping, Volume 132-133 . pp. 65-71. doi:10.1016/j.ijpvp.2015.05.009 ISSN 0308-0161.

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Official URL: http://dx.doi.org/10.1016/j.ijpvp.2015.05.009

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Abstract

This paper assesses the feasibility of transferring a laboratory-based electromagnetic (EM) sensor technique, which has already proved sensitive to significant (e.g. phase balance) or subtle (e.g. number density of fine precipitates) microstructural changes in steel, to non-destructive evaluation of the microstructure of power generation components such as tubes/pipes. It has been found that Grade 91 steels, in different conditions representative of service entry, thermally aged or ex-service, can be distinguished using laboratory-based measurement systems on small machined cylindrical samples as well as by an industry deployment EM sensor system on full-diameter tube samples. The measurements for the tube samples follow the same trend as the machined cylindrical samples. The results indicate an industrial deployable sensor system can be used for sorting service-exposed or mis-heat-treated/mis-manufactured Grade 91 steel tubes/pipes from the correctly heat treated service-entry ones.

Item Type: Journal Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Steel -- Electric properties, Tubes, Steel
Journal or Publication Title: International Journal of Pressure Vessels and Piping
Publisher: Elsevier Ltd
ISSN: 0308-0161
Official Date: August 2015
Dates:
DateEvent
August 2015Published
3 June 2015Available
12 May 2015Accepted
27 March 2015Modified
11 June 2014Submitted
Volume: Volume 132-133
Number of Pages: 6
Page Range: pp. 65-71
DOI: 10.1016/j.ijpvp.2015.05.009
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 29 December 2015
Date of first compliant Open Access: 29 December 2015
Funder: Engineering and Physical Sciences Research Council (EPSRC), Electric power research institute (EPRI)
Grant number: EP/H023429/1 (EPSRC), UOBKTS002 (EPRI)

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