2D modelling of inclined intergranular stress corrosion crack paths

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dc.contributor.authorGriggs, J.
dc.contributor.authorGamboa, E.
dc.contributor.authorLavigne, O.
dc.date.issued2017
dc.description.abstractInclined high pH stress corrosion cracking (SCC) is a type of intergranular environmen- tal cracking in gas pipelines, which differs from typical SCC by propagating at an angle from the wall direction. Investigations of Australian and Canadian inclined SCC colonies have not provided a clear indicator of a cause for the abnormal crack growth direction. This paper addresses the possibility of crack tip strain enhanced electrochemistry causing the inclination. Potentiodynamic tests were conducted to quantify the influence of strain on the electrochemistry, and strain was found to increase current density up to 300% in the SCC region. A model was developed that incorporates crack tip strain driven SCC growth, which showed good agreement with field grown cracks, and the aspect ratio of the grains was shown to have an effect on the inclination angle. The result s indicate that crack tip strain enhanced electrochemistry is a plausible cause for inclined SCC.
dc.description.statementofresponsibilityJ Griggs, E Gamboa and O Lavigne
dc.identifier.citationFatigue and Fracture of Engineering Materials and Structures, 2017; 40(4):543-555
dc.identifier.doi10.1111/ffe.12514
dc.identifier.issn8756-758X
dc.identifier.issn1460-2695
dc.identifier.orcidLavigne, O. [0000-0001-6757-0479]
dc.identifier.urihttp://hdl.handle.net/2440/129632
dc.language.isoen
dc.publisherWiley Publishing
dc.rights© 2016 Wiley Publishing Ltd.
dc.source.urihttps://doi.org/10.1111/ffe.12514
dc.subjectEffects of strain; gas pipelines; modelling studies; polarisation response; stress corrosion cracking; X65 steel
dc.title2D modelling of inclined intergranular stress corrosion crack paths
dc.typeJournal article
pubs.publication-statusPublished

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