Measurement of grain boundary composition for X52 pipeline steel

Wang, J. Q., Atrens, A., Cousens, D. R., Kelly, P. M., Nockolds, C. and Bulcock, S. (1998) Measurement of grain boundary composition for X52 pipeline steel. Acta Materialia, 46 16: 5677-5687. doi:10.1016/S1359-6454(98)00246-8

Author Wang, J. Q.
Atrens, A.
Cousens, D. R.
Kelly, P. M.
Nockolds, C.
Bulcock, S.
Title Measurement of grain boundary composition for X52 pipeline steel
Journal name Acta Materialia   Check publisher's open access policy
ISSN 1359-6454
Publication date 1998-10-09
Sub-type Article (original research)
DOI 10.1016/S1359-6454(98)00246-8
Volume 46
Issue 16
Start page 5677
End page 5687
Total pages 11
Place of publication Oxford, United Kingdom
Publisher Pergamon
Language eng
Abstract Analytical electron microscopy was used to measure the composition of grain boundaries (GBs) and interconstituent boundaries (IBs) of X52 pipeline steel using specimens about 40-60 nm in thickness. All elements of interest were examined with the exception of carbon. With this caveat; there was no segregation at proeutectoid ferrite GBs. This indicated that the commonly expected species S and P are not responsible for preferential corrosion of GBs during intergranular stress corrosion cracking of pipeline steels. Manganese was the only species measured to segregate at the IBs. Manganese segregated to the IBs between proeutectoid ferrite and pearlitic cementite, and desegregated from IBs between proeutectoid ferrite and pearlitic ferrite. The pearlitic cementite was Mn rich. There was no Mn segregation at the IBs between pearlitic ferrite and pearlitic cementite. The pattern of Mn segregation could be explained in terms of diffusion in the process zone ahead of the pearlite during the austenite to pearlite transformation and diffusion in the IBs between the proeutectoid ferrite and pearlite. (C) 1998 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.
Keyword Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Stress-corrosion Cracking
High-strength Steels
Carbonate-bicarbonate Solution
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
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Created: Mon, 13 Aug 2007, 10:45:13 EST