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In-situ determination of critical welding stresses during assembly of thick-walled components made of high-strength steel

  • The performance and safety of welded high-strength low-alloyed steel (HSLA) components are substantially affected by the stresses occurring during and after welding fabrication, especially if welding shrinkage and distortion are severely restrained. The surrounding structure of the whole component affects loads in the far-field superimposing with welding stresses in the near-field of the weld. In this study a unique testing facility was used to restrain shrinkage and bending while analyse multiaxial far-field loads (max. 2 MN) during assembly of thick-walled component. A novel approach for the assessment of the in-situ-measured far-field data in combination with the actual weld geometry was elaborated. For the first time, analyses of the global bending moments of restrained welds based on the neutral axis of the actual weld load bearing section were achieved. Hence, far-field measurements offered the possibility to determine critical near-field stresses of the weld crosssections forThe performance and safety of welded high-strength low-alloyed steel (HSLA) components are substantially affected by the stresses occurring during and after welding fabrication, especially if welding shrinkage and distortion are severely restrained. The surrounding structure of the whole component affects loads in the far-field superimposing with welding stresses in the near-field of the weld. In this study a unique testing facility was used to restrain shrinkage and bending while analyse multiaxial far-field loads (max. 2 MN) during assembly of thick-walled component. A novel approach for the assessment of the in-situ-measured far-field data in combination with the actual weld geometry was elaborated. For the first time, analyses of the global bending moments of restrained welds based on the neutral axis of the actual weld load bearing section were achieved. Hence, far-field measurements offered the possibility to determine critical near-field stresses of the weld crosssections for the entire joining process. This work presents the approach for far-to-near field in-situ determination of stresses in detail for the 2-MN-testing system based on an extensive experimental work on HSLA steel welds, which demonstrates sources and consequences of these high local welding stresses. Thus, it was clarified, why the first weld beads are crucial regarding welding stresses and cold cracking, which is well known, but has never been measured so far. Accompanying analyses using X-ray diffraction (XRD) after welding show effects on local residual stress distributions. These analyses indicated viable prospects for stress reduction during assembly of thick-walled HSLA steel components.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Dirk Schröpfer, Arne Kromm, Andreas Hannemann, Thomas Kannengießer
Persönliche Herausgeber/innen:Marc Seefeldt
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Residual stresses 2018, ECRS-10
Jahr der Erstveröffentlichung:2018
Organisationseinheit der BAM:9 Komponentensicherheit
9 Komponentensicherheit / 9.2 Versuchsanlagen und Prüftechnik
9 Komponentensicherheit / 9.4 Integrität von Schweißverbindungen
Veröffentlichende Institution:Bundesanstalt für Materialforschung und -prüfung (BAM)
Verlag:Materials Research Forum LLC
Verlagsort:Millersville, PA, USA
Jahrgang/Band:6
Erste Seite:191
Letzte Seite:196
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:HSLA steel; Large-scale test; Residual stress; Welding; X-ray diffraction
Themenfelder/Aktivitätsfelder der BAM:Material
Material / Life Cycle von Komponenten
Veranstaltung:European Conference on Residual Stresses 2018 - ECRS-10
Veranstaltungsort:Leuven, Belgium
Beginndatum der Veranstaltung:11.09.2018
Enddatum der Veranstaltung:14.09.2018
DOI:https://doi.org/10.21741/9781945291890-30
URN:urn:nbn:de:kobv:b43-466053
URL:http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000451793600030
ISSN:2474-395X
ISSN:2474-3941
ISBN:978-1-9452-9188-3
ISBN:978-1-9452-9189-0
Verfügbarkeit des Volltexts:Volltext-PDF für die Öffentlichkeit verfügbar ("Open Access")
Lizenz (Deutsch):License LogoCreative Commons - CC BY - Namensnennung 4.0 International
Datum der Freischaltung:16.11.2018
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:20.12.2018
Schriftenreihen ohne Nummerierung:Wissenschaftliche Artikel der BAM