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Weld solidification cracking: critical conditions for crack initiation and growth

  • A perspective will be given that outlines important considerations in evaluating and predicting weldability. An examination will be made of the local conditions necessary for solidifications crack initiation and growth in a weld. This will be done in light of two prominent thermo-mechanical approaches involving critical strain and critical strain rate. Critical conditions will be identified based upon values available in the literature. Methods used to measure strain and strain rate will be compared. The interpretation of crack lenght measurements commonly used to quantify weldability will be questioned, based upon our current understanding of the problem. Complications and problem areas needing better definition will be identified and discussed, including strain distribution in the mushy zone, segregation at grain boundaries, effect of impurities, and effect of cooling rate on solidification path. Finally, a suggestion will be made for a new approach to weld development using in-situA perspective will be given that outlines important considerations in evaluating and predicting weldability. An examination will be made of the local conditions necessary for solidifications crack initiation and growth in a weld. This will be done in light of two prominent thermo-mechanical approaches involving critical strain and critical strain rate. Critical conditions will be identified based upon values available in the literature. Methods used to measure strain and strain rate will be compared. The interpretation of crack lenght measurements commonly used to quantify weldability will be questioned, based upon our current understanding of the problem. Complications and problem areas needing better definition will be identified and discussed, including strain distribution in the mushy zone, segregation at grain boundaries, effect of impurities, and effect of cooling rate on solidification path. Finally, a suggestion will be made for a new approach to weld development using in-situ strain rate measurements and new composition-strain rate maps that define the boundary between crack an no-crack conditions.zeige mehrzeige weniger

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Metadaten
Autor*innen:Carl Edward Cross, Nicolas Coniglio
Persönliche Herausgeber*innen: Carl E. Cross, John C. Lippold, T. Böllinghaus, H. Herold
Dokumenttyp:Beitrag zu einem Sammelband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Hot cracking phenomena in welds II
Jahr der Erstveröffentlichung:2008
Verlag:Springer
Verlagsort:Berlin
Erste Seite:39
Letzte Seite:58
Freie Schlagwörter:Crack Growth; Crack Initiation; Crack Prediction; Critical Strain; Critical Strain Rate; Hot Cracking; Solidification Cracking; Weldability Testing
Veranstaltung:Hot cracking phenomena in welds II
Veranstaltungsort:Berlin, Germany
Beginndatum der Veranstaltung:2007-03-05
Enddatum der Veranstaltung:2007-03-06
ISBN:978-3-540-78627-6
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:Nein
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