Nanoindentation study of corrosion-induced grain boundary degradation in a pipeline steel

dc.contributor.author Bastawros, Ashraf
dc.contributor.author Shrotriya, Pranav
dc.contributor.author Yavas, Denizhan
dc.contributor.author Mishra, Pratyush
dc.contributor.author Alshehri, Abdullah
dc.contributor.author Shrotriya, Pranav
dc.contributor.author Hebert, Kurt
dc.contributor.author Bastawros, Ashraf
dc.contributor.author Hebert, Kurt R
dc.contributor.department Aerospace Engineering
dc.contributor.department Mechanical Engineering
dc.contributor.department Materials Science and Engineering
dc.contributor.department Chemical and Biological Engineering
dc.date 2018-02-07T16:41:05.000
dc.date.accessioned 2020-06-29T22:45:16Z
dc.date.available 2020-06-29T22:45:16Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 2018
dc.date.embargo 2018-02-02
dc.date.issued 2018-03-01
dc.description.abstract <p>High-strength low-alloy steels used for oil and gas pipelines are vulnerable to intergranular stress corrosion cracking in moderately alkaline soils. The mechanism of corrosion-induced embrittlement under such conditions is not yet understood. Nanoindentation was used to detect localized degradation of mechanical properties near internal grain boundaries of X-70 steel undergoing intergranular corrosion at active dissolution potentials at pH 8.2. The measurements identified a one-micron thick mechanically-degraded layer with 25% reduced hardness near corroded grain boundaries. It is suggested that the corrosion process may introduce an active softening agent, possibly non-equilibrium lattice vacancies generated by oxidation.</p>
dc.description.comments <p>This is a manuscript of an article published as Yavas, Denizhan, Pratyush Mishra, Abdullah Alshehri, Pranav Shrotriya, Kurt R. Hebert, and Ashraf F. Bastawros. "Nanoindentation study of corrosion-induced grain boundary degradation in a pipeline steel." <em>Electrochemistry Communications</em> 88 (2018): 88-92. doi: <a href="http://dx.doi.org/10.1016/j.elecom.2018.02.001" target="_blank">10.1016/j.elecom.2018.02.001</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/aere_pubs/108/
dc.identifier.articleid 1109
dc.identifier.contextkey 11496408
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath aere_pubs/108
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1950
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/aere_pubs/108/2018_Bastawros_NanoindentationStudy.pdf|||Fri Jan 14 18:28:31 UTC 2022
dc.source.uri 10.1016/j.elecom.2018.02.001
dc.subject.disciplines Aerodynamics and Fluid Mechanics
dc.subject.disciplines Aerospace Engineering
dc.subject.disciplines Nanoscience and Nanotechnology
dc.subject.disciplines Structures and Materials
dc.subject.keywords Intergranular corrosion
dc.subject.keywords Dissolution-induced degradation
dc.subject.keywords Stress corrosion cracking
dc.subject.keywords Grain boundary softening
dc.subject.keywords Nanoindentation
dc.title Nanoindentation study of corrosion-induced grain boundary degradation in a pipeline steel
dc.type article
dc.type.genre article
dspace.entity.type Publication
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