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Transmission Electron Microscopy Study on the Precipitation Behaviors of Laser-Welded Ferritic Stainless Steels and Their Implications on Intergranular Corrosion Resistance

dc.date.accessioned2022-03-14T13:33:34Z
dc.date.available2022-03-14T13:33:34Z
dc.date.issued2022-01-04
dc.identifierdoi:10.17170/kobra-202203145879
dc.identifier.urihttp://hdl.handle.net/123456789/13697
dc.description.sponsorshipGefördert durch den Publikationsfonds der Universität Kassel
dc.language.isoeng
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectstainless steeleng
dc.subjectlaser weldingeng
dc.subjectintergranular corrosioneng
dc.subjectprecipitationeng
dc.subjectsensitizationeng
dc.subjectelectron microscopyeng
dc.subject.ddc620
dc.titleTransmission Electron Microscopy Study on the Precipitation Behaviors of Laser-Welded Ferritic Stainless Steels and Their Implications on Intergranular Corrosion Resistanceeng
dc.typeAufsatz
dcterms.abstractThe intergranular corrosion susceptibility of ferritic stainless-steel weldments is strongly dependent on chromium carbide precipitation phenomena. Hence, stabilization is widely used to mitigate the aforementioned precipitation. In contrast, stabilization has proved ineffective to fully prevent intergranular corrosion due to segregation of unreacted chromium during solid-state heat-treatments. To analyze the precipitation behavior of 17 wt.-% chromium ferritic stainless steels during laser welding, sheets of unstabilized and titanium-stabilized ferritic stainless steels were welded in a butt joint configuration and characterized with special consideration of precipitation behavior by means of transmission electron microscopy. While unstabilized ferritic stainless steels exhibit pronounced chromium precipitate formation at grain boundaries, titanium-stabilization leads to titanium precipitates without adjacent chromium segregation. However, corrosion tests reveal three distinctive corrosion mechanisms within the investigated ferritic stainless steels based on their inherent precipitation behaviors. In light of the precipitation formation, it is evident that immersion in sulfuric acid media leads to the dissolution of either grain boundaries or the grain boundary vicinity. As a result, the residual mechanical strength of the joint is substantially degraded.eng
dcterms.accessRightsopen access
dcterms.creatorSommer, Niklas
dcterms.creatorWarres, Clementine
dcterms.creatorLutz, Tarek
dcterms.creatorKahlmeyer, Martin
dcterms.creatorBöhm, Stefan
dc.relation.doidoi:10.3390/met12010086
dc.subject.swdNicht rostender Stahlger
dc.subject.swdLaserschweißenger
dc.subject.swdInterkrisalline Korrosionger
dc.subject.swdNiederschlagger
dc.subject.swdElektronenmikroskopger
dc.type.versionpublishedVersion
dcterms.source.identifiereissn:2075-4701
dcterms.source.issueIssue 1
dcterms.source.journalMetals
dcterms.source.volumeVolume 12
kup.iskupfalse
dcterms.source.articlenumber0086


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Namensnennung 4.0 International
Except where otherwise noted, this item's license is described as Namensnennung 4.0 International