Microstructure and mechanical properties of dissimilar ferritic (S355)-austenitic (AISI 304) steel joints welded by robotic GMAW

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dc.contributor.authorÇoban, Ozan
dc.date.accessioned2025-08-28T13:31:41Z
dc.date.available2025-08-28T13:31:41Z
dc.date.issued2025
dc.departmentMeslek Yüksekokulu, Gedik Meslek Yüksekokulu, Kaynak Teknolojisi Programı
dc.departmentRektörlük, Kaynak Teknolojisi Uygulama ve Araştırma Merkezi
dc.description.abstractIn applications requiring high corrosion resistance, it is crucial to utilize dissimilar welding techniques that incorporate structural steels in critical areas to reduce costs, rather than constructing the entire structure from high-cost stainless steels. Ferritic steels are often preferred due to their higher strength compared to stainless steels. In this study, Gas Metal Arc Welding (GMAW) was performed on 12 >mm thick S355 structural steel and AISI 304 austenitic stainless steel using SG307 austenitic filler metal. Following welding operations with three different heat inputs, macrostructural assessments were carried out according to the EN ISO5817:2023(E) standard on the welds deemed successful based on nondestructive tests. Microstructural characterization, microhardness tests, tensile test, and impact tests (performed by notching different regions of the weld joint) were also conducted. The results demonstrated that undesirable changes in mechanical properties due to microstructural transformations in the welding of carbon steels with austenitic stainless steels can be mitigated with the correct parameters and proper filler metal selection. Thus, the mechanical properties required to ensure the expected performance of the welded structure were successfully achieved. Results revealed that the dissimilar joint efficiency with respect to yield strength of ferritic steel was calculated as 103.77 >% and 175.42 >% for austenitic AISI 304 steel. The impact toughness test results for the heat-affected zone (HAZ) of S355 steel showed satisfactory levels. Although the dissimilar weld metal region exhibited lower toughness values, they remained above 100 J.
dc.identifier.doi10.1515/mt-2024-0405
dc.identifier.endpage899
dc.identifier.issn0025-5300
dc.identifier.issn2195-8572
dc.identifier.issue5
dc.identifier.scopus2-s2.0-105002759385
dc.identifier.scopusqualityQ2
dc.identifier.startpage884
dc.identifier.urihttps://doi.org/10.1515/mt-2024-0405
dc.identifier.urihttps://hdl.handle.net/11501/2329
dc.identifier.volume67
dc.identifier.wosWOS:001463526600001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorÇoban, Ozan
dc.institutionauthorid0000-0002-1506-4619
dc.language.isoen
dc.publisherWalter de Gruyter GmbH
dc.relation.ispartofMaterials Testing
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAustenitic Steel
dc.subjectCarbon Steel
dc.subjectCharacterization
dc.subjectDissimilar Weld
dc.subjectFerritic Steel
dc.subjectMild Steel
dc.titleMicrostructure and mechanical properties of dissimilar ferritic (S355)-austenitic (AISI 304) steel joints welded by robotic GMAW
dc.typeArticle

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