Enhancing weld strength in high-strength steels: the role of regional preheating in RSW

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dc.authoridAYDIN, KEMAL/0000-0003-2951-4657
dc.contributor.authorAydin, Kemal
dc.contributor.authorHidiroglu, Mehtap
dc.contributor.authorKahraman, Nizamettin
dc.date.accessioned2024-09-29T16:06:17Z
dc.date.available2024-09-29T16:06:17Z
dc.date.issued2024
dc.departmentKarabük Üniversitesien_US
dc.description.abstractIn this study, automotive in sector use STRENX 700 CR and DP 800 steels were joined by resistance spot welding using medium frequency direct current. Some parts were joined under atmospheric conditions, while others were joined by applying regional preheating to their heat-affected zones before welding. The design, manufacturing, and adaptation of the preheating system to the welding machine were carried out as part of this study, considering it as a new system. After the joining process, nondestructive and destructive tests were performed on resistance spot welding connections between STRENX 700 CR and DP 800 steels. Hardness tests revealed that the preheating applied to the heat-affected zones before welding reduced the hardness of the weld metal by approximately 8 %, while the microstructure analysis showed that the regional preheating increased both the weld metal and the heat-affected zones width. The tensile-shear strength increased by about 7 %, and the cross-tension test strength increased by about 5 % with the preheating applied to the heat-affected zones before welding. In both the tensile-shear and cross-tension tests, all failures occurred in the form of button shearing from the heat-affected zones. The regional preheating treated specimens showed the highest fatigue life, with an average of 947,632 cycles.en_US
dc.description.sponsorshipKarabk University Rectorate and the BAP Coordinatoren_US
dc.description.sponsorshipNo Statement Availableen_US
dc.identifier.doi10.1515/mt-2023-0241
dc.identifier.endpage346en_US
dc.identifier.issn0025-5300
dc.identifier.issn2195-8572
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-85183495888en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage328en_US
dc.identifier.urihttps://doi.org/10.1515/mt-2023-0241
dc.identifier.urihttps://hdl.handle.net/20.500.14619/6723
dc.identifier.volume66en_US
dc.identifier.wosWOS:001150239600001en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherWalter De Gruyter Gmbhen_US
dc.relation.ispartofMaterials Testingen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectresistance spot weldingen_US
dc.subjectMFDCen_US
dc.subjectAHSSen_US
dc.subjectSTRENX 700 CRen_US
dc.subjectDP 800en_US
dc.subjectfatigueen_US
dc.titleEnhancing weld strength in high-strength steels: the role of regional preheating in RSWen_US
dc.typeArticleen_US

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