Fracture toughness of an industrial alloy 182 weld: effect of temperature, specimen orientation and PWHT

Inge Uytdenhouwen, Rik-Wouter Bosch, Frédéric Somville, Séverine De Vroey, Erich Stergar

    Research outputpeer-review


    A high Nickel based dissimilar metal weld (Alloy 182), known for its susceptibility to Primary Water Stress Corrosion Cracking (PWSCC), was investigated by fracture toughness tests in the ductile regime. One of the key inputs for the structural integrity evaluation of components is determined by the maximum acceptable defect size that is based on the crack growth rates from fracture toughness specimens. Extensive testing programs were carried out over the last years at SCK CEN and elsewhere and a large scatter of results is reported in literature. The scatter is related to the heterogeneous nature of the weld material, but no full explanation is available yet. An overview of the obtained results is given as a function of the test temperature, the specimen orientation in the weld and the post-weld heat treatment (PWHT).
    Original languageEnglish
    Title of host publicationTransactions of the SMiRT 27 Yokohama, Japan, March 3-8, 2024
    Subtitle of host publicationDivision II: , Fracture Mechanics and Structural Integrity
    PublisherIASMiRT - International Assn for Structural Mechanics in Reactor Technology
    Number of pages6
    StatePublished - 3 Mar 2024
    Event2024 - SMIRT: 27th International Conference on Structural Mechanics in Reactor Technology - PACIFICO Yokohama, Yokohama
    Duration: 3 Mar 20248 Mar 2024


    Conference2024 - SMIRT
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