Numerical investigations on cold cracking avoidance in fillet welds of high-strength steels
- Industry faces a growing demand for high-strength structural steels with yield strengths of up to 1,300 MPa in order to cope with increasingly higher strength requirements in engineering. Higher strength levels are achieved by a special coordinated production process and an adapted chemical composition. Nevertheless, disastrous damage cases with high-strength steels have occurred in the past. The sensitivity to mechanical property degradation by hydrogen increases dramatically with strength. This phenomenon leads to hydrogen-assisted cold cracking. T-joints with fillet welds made from one side with an included angle of 60° were examined for their cold cracking behavior. Based on the T-joint, a modified heat input, even interpass temperature, plate thickness, and length ones were examined. The diffusion behavior and the effectiveness of different post-weld heat treatments in joints were simulated. The results of post-weld heat treatments are illustrated in practical hydrogen removalIndustry faces a growing demand for high-strength structural steels with yield strengths of up to 1,300 MPa in order to cope with increasingly higher strength requirements in engineering. Higher strength levels are achieved by a special coordinated production process and an adapted chemical composition. Nevertheless, disastrous damage cases with high-strength steels have occurred in the past. The sensitivity to mechanical property degradation by hydrogen increases dramatically with strength. This phenomenon leads to hydrogen-assisted cold cracking. T-joints with fillet welds made from one side with an included angle of 60° were examined for their cold cracking behavior. Based on the T-joint, a modified heat input, even interpass temperature, plate thickness, and length ones were examined. The diffusion behavior and the effectiveness of different post-weld heat treatments in joints were simulated. The results of post-weld heat treatments are illustrated in practical hydrogen removal heat treatment diagrams. It is noticed that the T-joint is subject to a very high risk of hydrogen-assisted cold cracking (HACC). Contrary to other joints, its most critical area for cracking is not the weld metal but the heat-affected zone surrounding area of the root pass. The simulation shows that HACC in the T-joint can only be avoided by applying a sufficient post-weld heat treatment.…
MetadatenAutor*innen: | Enrico Steppan, Tobias MenteORCiD, Thomas Böllinghaus |
---|
Dokumenttyp: | Zeitschriftenartikel |
---|
Veröffentlichungsform: | Verlagsliteratur |
---|
Sprache: | Englisch |
---|
Titel des übergeordneten Werkes (Englisch): | Welding in the world |
---|
Jahr der Erstveröffentlichung: | 2013 |
---|
Herausgeber (Institution): | International Institute of Welding |
---|
Verlag: | Springer |
---|
Verlagsort: | Oxford |
---|
Jahrgang/Band: | 57 |
---|
Ausgabe/Heft: | 3 |
---|
Erste Seite: | 359 |
---|
Letzte Seite: | 371 |
---|
Freie Schlagwörter: | Fillet welds; High-strength structural steels; Hydrogen diffusion; Hydrogen removal heat treatment diagramm (HRHT); Hydrogen-assisted cold cracking (HACC); Numerical simulation; Post-weld heat treatment; T joints |
---|
DOI: | 10.1007/s40194-013-0036-4 |
---|
ISSN: | 0043-2288 |
---|
ISSN: | 1878-6669 |
---|
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
---|
Datum der Freischaltung: | 20.02.2016 |
---|
Referierte Publikation: | Ja |
---|
Datum der Eintragung als referierte Publikation: | 08.04.2013 |
---|