63370 2025 eng 1 11 conferenceobject Springer Nature Berlin ; Heidelberg 1 -- -- -- Residual stress reduction using a low transformation temperature welding consumable with focus on the weld geometry Low transformation temperature (LTT) welding consumables represent an innovative approach to realize compressive residual stress in the weld seam and HAZ. LTT welding consumables use the volume-expanding martensitic phase transformation near room temperature to generate compressive residual stress during cooling. This article focuses on the weld geometry and its influence on residual stress reduction using an LTT welding consumable. For this purpose, layers with an LTT welding consumable were additionally applied to the front sides of conventionally welded longitudinal stiffeners. Different weld geometries of the second weld seam could be realized by varying the welding parameters. These samples were analyzed for geometric parameters, chemical composition, and residual stress. While the chemical composition and martensite start temperature (MS) were only slightly influenced by parameter changes, a clear influence with regard to residual stress and weld geometry was observed. Depending on the shape of the second LTT weld seam, residual stress reductions of 200 to 500 MPa were achieved using the same LTT welding consumable. Welding in the World 1878-6669 10.1007/s40194-025-02094-3 urn:nbn:de:kobv:b43-633707 IIW Annual Assembly and International Conference Rhodes Island, Dodecanisa, Greece 07.07.2024 12.07.2024 publish 30.06.2025 Creative Commons - CC BY - Namensnennung 4.0 International Martin Hübner Florian Dittmann Arne Kromm Igor Varfolomeev Thomas Kannengießer eng uncontrolled Low transformation temperature (LTT) eng uncontrolled Martensite start temperature eng uncontrolled Dilution eng uncontrolled Weld geometry eng uncontrolled Residual stress Angewandte Physik 9 Komponentensicherheit 9.4 Integrität von Schweißverbindungen Energie Verlagsliteratur Datei für die Öffentlichkeit verfügbar ("Open Access") Wissenschaftliche Artikel der BAM Windenergie Bundesanstalt für Materialforschung und -prüfung (BAM) https://opus4.kobv.de/opus4-bam/files/63370/s40194-025-02094-3.pdf