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Modelling of Hydrogen Diffusion and Cracking in Steel Welds

  • Hydrogen assisted steel corrosion and cold cracking is still a major topic regarding the reliability of welded steel components, such as offshore platforms and pipelines. Measurement of local and crack critical hydrogen concentrations in a specific weld is difficult and not very precise. Numerical simulations of hydrogen uptake and diffusion developed within the last twenty years have to be regarded as much more effective to determine local hydrogen concentrations in crack critical regions of welds. As an overview of existing theories of the state of the art in modelling of hydrogen cracking in steels, the present contribution shows that the development of a comprehensive numerical model for both types of hydrogen assisted cracking in welds, hydrogen assisted stress corrosion cracking and cold cracking, is still a major research task. As a first step towards that direction, a basic procedure for numerical simulation of crack initiation and propagation has been developed andHydrogen assisted steel corrosion and cold cracking is still a major topic regarding the reliability of welded steel components, such as offshore platforms and pipelines. Measurement of local and crack critical hydrogen concentrations in a specific weld is difficult and not very precise. Numerical simulations of hydrogen uptake and diffusion developed within the last twenty years have to be regarded as much more effective to determine local hydrogen concentrations in crack critical regions of welds. As an overview of existing theories of the state of the art in modelling of hydrogen cracking in steels, the present contribution shows that the development of a comprehensive numerical model for both types of hydrogen assisted cracking in welds, hydrogen assisted stress corrosion cracking and cold cracking, is still a major research task. As a first step towards that direction, a basic procedure for numerical simulation of crack initiation and propagation has been developed and experimentally verified. The approach can be extended to a comprehensive quantitative model for life time prediction and risk based inspection of welded steel components. (Steel specimen used was S355 along with other materials such as AISI 321, Incoloy 800, Inconel 690 and 600.)zeige mehrzeige weniger

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Metadaten
Autor*innen:Thomas Böllinghaus
Persönliche Herausgeber*innen:H. Cerjak
Dokumenttyp:Beitrag zu einem Sammelband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Mathematical modelling of weld phenomena 5
Jahr der Erstveröffentlichung:2000
Verlag:IOM Communications
Verlagsort:London
Ausgabe/Heft:738
Erste Seite:1019
Letzte Seite:1059
Veranstaltung:Fifth International Seminar on the 'Numerical Analysis of Weldability'
Veranstaltungsort:Graz, Austria
Beginndatum der Veranstaltung:1999-09-01
ISBN:1-86125-115-7
Bemerkung:
Serientitel: Book / The Institute of Materials – Series title: Book / The Institute of Materials
Verfügbarkeit des Dokuments:Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
Bibliotheksstandort:Nd 702
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein
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