Integrated weld preparation designs for the joining of L-PBF and conventional components via TIG welding

dc.contributor.authorGeisen, Ole
dc.contributor.authorMüller, Vinzenz
dc.contributor.authorGraf, Benjamin
dc.contributor.authorRethmeier, Michael
dc.date.accessioned2022-10-04T09:35:18Z
dc.date.available2022-10-04T09:35:18Z
dc.date.issued2022-04-18
dc.description.abstractLaser powder bed fusion (L-PBF) of entire assemblies is not typically practical for technical and economic reasons. The build size limitations and high production costs of L-PBF make it competitive for smaller, highly complex components, while the less complex elements of an assembly are manufactured conventionally. This leads to scenarios that use L-PBF only where it’s beneficial, and it require an integration and joining to form the final product. For example, L-PBF combustion swirlers are welded onto cast parts to produce combustion systems for stationary gas turbines. Today, the welding process requires complex welding fixtures and tack welds to ensure the correct alignment and positioning of the parts for repeatable weld results. In this paper, L-PBF and milled weld preparations are presented as a way to simplify the Tungsten inert gas (TIG) welding of rotationally symmetrical geometries using integrated features for alignment and fixation. Pipe specimens with the proposed designs are manufactured in Inconel 625 using L-PBF and milling. The pipe assembly is tested and TIG welding is performed for validation. 3D scans of the pipes before and after welding are evaluated, and the weld quality is examined via metallography and computed tomography (CT) scans. All welds produced in this study passed the highest evaluation group B according to DIN 5817. Thanks to good component alignment, safe handling, and a stable welding process, the developed designs eliminate the need for part-specific fixtures, simplify the process chain, and increase the process reliability. The results are applicable to a wide range of components with similar requirements.en
dc.description.sponsorshipTU Berlin, Open-Access-Mittel – 2022en
dc.identifier.eissn2363-9520
dc.identifier.issn2363-9512
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/17046
dc.identifier.urihttps://doi.org/10.14279/depositonce-15825
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.otherL-PBFen
dc.subject.otherInconel 625en
dc.subject.otherTIG weldingen
dc.subject.otherdissimilar jointsen
dc.subject.otherpipe weld preparationen
dc.subject.otherintegrated alignment featuresen
dc.subject.otherAM feature integrationen
dc.titleIntegrated weld preparation designs for the joining of L-PBF and conventional components via TIG weldingen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1007/s40964-021-00221-2en
dcterms.bibliographicCitation.journaltitleProgress in Additive Manufacturingen
dcterms.bibliographicCitation.originalpublishernameSpringer Natureen
dcterms.bibliographicCitation.originalpublisherplaceHeidelbergen
dcterms.bibliographicCitation.pageend821
dcterms.bibliographicCitation.pagestart811
dcterms.bibliographicCitation.volume7
tub.accessrights.dnbfreeen
tub.affiliationFak. 5 Verkehrs- und Maschinensysteme>Inst. Werkzeugmaschinen und Fabrikbetrieb>FG Fügetechnikde
tub.affiliation.facultyFak. 5 Verkehrs- und Maschinensystemede
tub.affiliation.groupFG Fügetechnikde
tub.affiliation.instituteInst. Werkzeugmaschinen und Fabrikbetriebde
tub.publisher.universityorinstitutionTechnische Universität Berlinen
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