Application of advanced master curve approaches on WWER-440 reactor pressure vessel steels

H.-W. Viehrig (Corresponding Author), M. Scibetta, Kim Wallin

    Research output: Contribution to journalArticleScientificpeer-review

    20 Citations (Scopus)

    Abstract

    The master curve (MC) approach used to measure the transition temperature, T0, was standarised in the ASTM Standard Test Method E 1921 in 1997. The basic MC approach for analysis of fracture test results is intended for macroscopically homogeneous steels with a body centred cubic (ferritic) structure only. In reality, due to the manufacturing process, the steels in question are seldom fully macroscopically homogeneous.

    The fracture toughness values measured on Charpy size SE(B) specimens of base metal from the Greifswald Unit 8 rector pressure vessel (RPV) show large scatter. The basic MC evaluation following ASTM E1921 supplies a MC with many fracture toughness values which lie below the 5% fracture probability line. It is therefore suspected that this material is macroscopically inhomogeneous. In this paper, two recent extensions of the MC for inhomogeneous materials are applied to these fracture toughness data.
    Original languageEnglish
    Pages (from-to)584-592
    Number of pages9
    JournalInternational Journal of Pressure Vessels and Piping
    Volume83
    Issue number8
    DOIs
    Publication statusPublished - 2006
    MoE publication typeA1 Journal article-refereed

    Keywords

    • reactor pressure vessel steel
    • pressure vessel
    • reactor pressure vessel
    • steels
    • fracture toughness
    • master curve
    • inhomogeneous material
    • random inhomogeneity
    • maximum likelihood procedure
    • SINTAP procedure

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