Triaxial residual stress states for multipass welds processed using novel LTT filler materials under variation of the alloy composition
Low transformation temperature (LTT) filler materials offer an attractive alternative to cost intensive postweld treatments to generate compressive residual stresses over the weld joint in the course of the welding procedure itself. To study this stress built-up triaxial residual stress analyses will be carried out for the three mean stress components for multipass weld lines processed by MAG welding. The project aims at the determination of local phase-specific residual stress distributions introduced in multipass welding with respect to the local amount of retained austenite. Neutron residual stress analysis will be carried out at the weld centerline on a path in depth direction to determine the depth distribution within the weld. Further a path over the final pass in a distance of about 2 mm to the nominal surface will be measured. Three different LTT filler materials will be analyzed. Further, the residual stress built up in a multipass weld will be studied for different conventional weld fillers in combination with a final pass of LTT filler material. By this means, the suitability of LTT filler materials to be applied for repair welds of high strength steel will be studied.
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GIBMEIER Jens; PIRLING Thilo; REBELO KORNMEIER Joana and VOLLERT Florian. (2015). Triaxial residual stress states for multipass welds processed using novel LTT filler materials under variation of the alloy composition. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-02-182
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