Hot Cracking Behavior of LTT Alloys under Variable Conditions in the Varestraint Test
- The use of Low Transformation Temperature (LTT) filler materials is an innovative way to reduce welding residual stresses. The generation of compressive residual stresses in the weld and heat-affected zone can lead to an improvement of the fatigue life of high-strength welds. However, high-alloy filler metals can be prone to solidification cracking. Two important LTT alloys were evaluated under variable welding and loading parameters using the Modified Varestraint/Transvarestraint (MVT) test. Initially conflicting results were interpreted using a newly developed image-based crack detection routine [1]. Based on the melt pool dimensions, the shape of the isotherms is reconstructed, and the theoretical crack growth along numerically determined crystallization paths is considered in relation to the cracks observed. Decreasing welding speeds with simultaneously higher heat input promote crack formation with increasing strain rate.
Autor*innen: | Arne KrommORCiD |
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Koautor*innen: | Maximilian Thomas, Philipp Liepold, Thomas Kannengießer, J. Gibmeier |
Dokumenttyp: | Vortrag |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2023 |
Organisationseinheit der BAM: | 9 Komponentensicherheit |
9 Komponentensicherheit / 9.4 Integrität von Schweißverbindungen | |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Angewandte Physik |
Freie Schlagwörter: | LTT; Solidification cracking; Varestraint test |
Themenfelder/Aktivitätsfelder der BAM: | Energie |
Veranstaltung: | International Joint Conference EMPOrIA 2023 |
Veranstaltungsort: | Aachen, Germany |
Beginndatum der Veranstaltung: | 16.05.2023 |
Enddatum der Veranstaltung: | 17.05.2023 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 26.05.2023 |
Referierte Publikation: | Nein |
Eingeladener Vortrag: | Nein |