Reduction of residual stresses in laser beam welds by means of defocused laser beams
- Longitudinal residual stresses in beam welds ranging at the value of the local yield strength can diminish the lifespan of components. To extend the service life of welds special methods of welding residual stress reduction were developed earlier which are however not effective for beam welds in complex component geometries. Application of beam welding sources for postwelding heat treatment of components has become a flexible tool for reducing longitudinal stresses in beam welds. Such heat treatment in a specific transversal distance to the weld by a defocused beam results in huge stress reductions depending on the used process parameters. Experimental results for ferritic and austenitic steels reveal weld stress reductions to up to compressive stresses. For different materials and diverse material thicknesses special process parameter regions have to be used in this procedure. At a transmission component this procedure shows a stress reduction by >300 MPa.
Autor*innen: | Florian Tölle, Andrey GumenyukORCiD, Michael RethmeierORCiD |
---|---|
Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Science and technology of welding and joining |
Jahr der Erstveröffentlichung: | 2012 |
Herausgeber (Institution): | Institute of Materials, Minerals and Mining |
Verlag: | Maney |
Verlagsort: | London |
Jahrgang/Band: | 17 |
Ausgabe/Heft: | 5 |
Erste Seite: | 381 |
Letzte Seite: | 385 |
Freie Schlagwörter: | Beam welding; Post-welding heat treatment; Residual stress; Stress reduction |
DOI: | 10.1179/1362171812Y.0000000019 |
ISSN: | 1362-1718 |
ISSN: | 1743-2936 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 11.06.2012 |