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Dynamic fracture toughness behaviour of ductile cast iron with respect to structural integrity assessment

  • Modern structural integrity assessment procedures in the field of nuclear related technology incorporate fracture mechanical concepts. Therefore, they inevitably require the availability of both, loading parameters as well as material characteristics in terms of fracture mechanical quantities. Especially in case of dynamic loading conditions, the methods for the determination of the loading parameters need further improvement and there is a lack of material characteristics as well. In Germany, ductile cast iron (DCI) is used for heavy-sectioned casks for radioactive materials. New developments in cask design and efforts to extend the application limits require further investigations. The present study is part of an ongoing fracture mechanics research programme of BAM which is focused on the systematic mechanical and fracture mechanical material characterisation of DCI materials under dynamic loading conditions. In this study, results of fracture mechanics investigations on ductile castModern structural integrity assessment procedures in the field of nuclear related technology incorporate fracture mechanical concepts. Therefore, they inevitably require the availability of both, loading parameters as well as material characteristics in terms of fracture mechanical quantities. Especially in case of dynamic loading conditions, the methods for the determination of the loading parameters need further improvement and there is a lack of material characteristics as well. In Germany, ductile cast iron (DCI) is used for heavy-sectioned casks for radioactive materials. New developments in cask design and efforts to extend the application limits require further investigations. The present study is part of an ongoing fracture mechanics research programme of BAM which is focused on the systematic mechanical and fracture mechanical material characterisation of DCI materials under dynamic loading conditions. In this study, results of fracture mechanics investigations on ductile cast iron from an original DCI container with a wide variety of microstructure under dynamic loading conditions in the temperature range from -50 °C to +22 °C are presented. Large scale as well as small scale single edge crack bend specimens SE(B) with thicknesses of 140 mm and 15 mm, respectively were tested. Furthermore, it is reported on the results of a finite element simulation of the dynamic large scale fracture mechanics tests. Strength and deformation characteristics were determined in dynamic tensile tests. They are discussed with respect to the influence of pearlite content and test temperature. The material specific experimental difficulties in the determination of reliable dynamic crack initiation toughness values of DCI are outlined.zeige mehrzeige weniger

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Metadaten
Autor*innen:Wolfram BaerORCiD, Karsten Müller, Peter Wossidlo, Dietmar Klingbeil
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Transactions of the SMIRT 17
Jahr der Erstveröffentlichung:2003
Herausgeber (Institution):International Association for Structural Mechanics in Reactor Technology
Verlagsort:Prague
Ausgabe/Heft:G04-4
Erste Seite:1
Letzte Seite:8
Freie Schlagwörter:Analysis procedure; Component; Crack initiation toughness; Ductile cast iron; Dynamic fracture toughness; Finite element simulation; Fracture mechanics; Graphite morphology; Loading rate; Microstructure; Specimen geometry; Structural integrity; Test temperature; Testing
Veranstaltung:17th International Conference on Structural Mechanics in Reactor Technology ; SMiRT 17
Veranstaltungsort:Prague, Czech Republic
Beginndatum der Veranstaltung:2003-08-17
Enddatum der Veranstaltung:2003-08-22
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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