Relationship between a bainitic structure and the hardness in the weld zone of the friction-stir welded X80 API-grade pipe-line steel

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dc.contributor.buuauthorAydın, Hakan
dc.contributor.departmentUludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü.tr_TR
dc.contributor.scopusid16312009400tr_TR
dc.date.accessioned2022-06-17T10:56:09Z
dc.date.available2022-06-17T10:56:09Z
dc.date.issued2014
dc.description.abstractThe present study focuses on the morphology of the weld zone, especially on the quantitative microstructural characterization of bainitic structures, and the relationship between post-weld bainitic structures and the hardness at the weld zone of the friction-stir welded X80 API-grade pipe-line steel. The employed rotating and traverse speeds of the polycrystalline cubic boron nitride tool during the friction-stir welding process were 350 r/min and 12.7 cm/min (5 inch per minute), respectively. A microstructural analysis of the weld was carried out using optical microscopy, orientation imaging microscopy and transmission electron microscopy, and the hardness variation was also mapped across the weld-plate cross section. The frictional heat and plastic flow during friction-stir welding create a granular bainitic structure (the stir zone), a lath-like upper bainitic structure (the hard zone) and a recrystallized equiaxed polygonal ferritic structure (the heat-affected zone) in the weld zone. The maximum hardness was observed in the classical upper bainitic microstructure in the hard zone. The minimum hardness was found in the heat-affected zone. A good correlation between the post-weld bainitic structures and the hardness in the weld zone was obtained; the hardness increases almost linearly with the decreasing bainite-lath and packet sizes.en_US
dc.identifier.citationAydın, H. (2014). "Relationship between a bainitic structure and the hardness in the weld zone of the friction-stir welded X80 API-grade pipe-line steel". Materiali in Tehnologije, 48(1), 15-22.en_US
dc.identifier.endpage22tr_TR
dc.identifier.issn1580-2949
dc.identifier.issn1580-3414
dc.identifier.issue1tr_TR
dc.identifier.scopus2-s2.0-84894025774tr_TR
dc.identifier.startpage15tr_TR
dc.identifier.urihttp://mit.imt.si/Revija/izvodi/mit141/aydin.pdf
dc.identifier.urihttp://hdl.handle.net/11452/27247
dc.identifier.volume48tr_TR
dc.identifier.wos000331494300003tr_TR
dc.indexed.scopusScopusen_US
dc.indexed.wosSCIEen_US
dc.language.isoenen_US
dc.publisherInst Za Kovinske Materiale I in Tehnologiesl
dc.relation.journalMateriali in Tehnologijeen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergitr_TR
dc.relation.tubitakTÜBİTAKtr_TR
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectFriction-stir weldingen_US
dc.subjectX80 steelen_US
dc.subjectBainiteen_US
dc.subjectMicrohardnessen_US
dc.subjectMechanical-propertiesen_US
dc.subjectParametersen_US
dc.subjectMaterials scienceen_US
dc.subjectMetallurgy & metallurgical engineeringen_US
dc.subject.scopusAluminum; Bobbins; Welded Jointsen_US
dc.subject.wosMaterials science, multidisciplinaryen_US
dc.subject.wosMetallurgy & metallurgical engineeringen_US
dc.titleRelationship between a bainitic structure and the hardness in the weld zone of the friction-stir welded X80 API-grade pipe-line steelen_US
dc.typeArticle
dc.wos.quartileQ4en_US

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