Effect of processing temperatures on the properties of a high-strength steel welded by FSW

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorSorger, Gonçaloen_US
dc.contributor.authorSarikka, Teemuen_US
dc.contributor.authorVilaça, Pedroen_US
dc.contributor.authorSantos, Telmo G.en_US
dc.contributor.departmentDepartment of Mechanical Engineeringen
dc.contributor.groupauthorEngineering Materialsen
dc.contributor.organizationNOVA University Lisbonen_US
dc.date.accessioned2018-12-10T10:11:33Z
dc.date.available2018-12-10T10:11:33Z
dc.date.issued2018-11-01en_US
dc.description.abstractThe need for weight reduction without compromising load-bearing capacity has driven the development of modern high-strength steels (HSS). The ability to take full advantage of these modern HSS is limited by their weldability. Friction stir welding (FSW) can join HSS at low peak temperatures, better preserving the properties of the base material. This work evaluates the influence of different FSW peak temperatures and cooling rates on the properties of a modern HSS. A HSS produced by a thermo-mechanically controlled process was welded by FSW with peak temperatures, measured within the processed zone, ranging from about 900 to 650 °C. Temperatures were measured using thermocouples positioned at the mid-thickness of the workpiece, at 5 to 10 mm from the joint line. The effect of the different peak temperatures was evaluated by mechanical testing, including bending, tensile testing with digital imaging correlation, Charpy impact test, and hardness measurements. Microscopic analyses, including optical microscopy and electron backscatter diffraction, were used to evaluate the microstructure. Results show that FSW enables welding HSS within the intercritical temperature domain. The impact toughness of the best weld condition overmatched the base material by over 37%, at both − 40 and − 60 °C. The yield strength efficiency was about 70%.en
dc.description.versionPeer revieweden
dc.format.extent13
dc.format.extent1173-1185
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationSorger, G, Sarikka, T, Vilaça, P & Santos, T G 2018, ' Effect of processing temperatures on the properties of a high-strength steel welded by FSW ', Welding in the World, vol. 62, no. 6, pp. 1173-1185 . https://doi.org/10.1007/s40194-018-0612-8en
dc.identifier.doi10.1007/s40194-018-0612-8en_US
dc.identifier.issn0043-2288
dc.identifier.otherPURE UUID: 209a3cfd-b748-4433-9e68-84ac96f1b8been_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/209a3cfd-b748-4433-9e68-84ac96f1b8been_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85055744099&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/29548566/ENG_Sorger_et_al_Effect_of_Processing_Temperatures_Welding_in_the_World.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/34948
dc.identifier.urnURN:NBN:fi:aalto-201812105963
dc.language.isoenen
dc.relation.ispartofseriesWelding in the Worlden
dc.relation.ispartofseriesVolume 62, issue 6en
dc.rightsopenAccessen
dc.subject.keywordFriction stir weldingen_US
dc.subject.keywordHigh-strength steelsen_US
dc.subject.keywordMechanical propertiesen_US
dc.subject.keywordMicrostructureen_US
dc.subject.keywordTemperatureen_US
dc.titleEffect of processing temperatures on the properties of a high-strength steel welded by FSWen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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