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Large Ductile Tearing in Dissimilar Material Welds and Transferability Issues

[+] Author Affiliations
Philippe Gilles

AREVA, Paris-La-Défense, France

Alexandre Brosse, Philippe Mourgue

ESI-France, Lyon, France

Paper No. PVP2011-57898, pp. 665-674; 10 pages
  • ASME 2011 Pressure Vessels and Piping Conference
  • Volume 3: Design and Analysis
  • Baltimore, Maryland, USA, July 17–21, 2011
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4453-3
  • Copyright © 2011 by ASME


Dissimilar Metal Welds (DMW) are required in nuclear reactors to join low alloy steel components and stainless piping. The thermal and mechanical mismatch between the dissimilar material characteristics favors the stress concentration in the weld along the austenitic/ferritic interface. Assessing the ductile tearing resistance of DMWs is an issue even for crack initiation. But predicting large crack extensions is even more difficult for several reasons: crack path deviation, J-R curve determination, transferability from specimen to structures. This paper presents an approach to determine the resistance curve of a DMW on the basis of a ductile tearing simulation using a cavity growth model.

Copyright © 2011 by ASME
Topics: Welded joints



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