Inhomogeneity Screening Criterion for the ASTM E1921 T0 Estimate Based on the SINTAP Lower-Tail Methodology

    Volume 40, Issue 6 (November 2012)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 1 September 2012

    Page Count: 8


    Wallin, Kim R. W.
    VTT Technical Research Centre of Finland,

    (Received 26 July 2011; accepted 17 April 2012)

    Abstract

    The master curve brittle fracture toughness estimation method described in the ASTM E1921-11 test standard is based on a theoretical scatter and size effect assumption and makes use of a maximum likelihood estimation method to determine the fracture toughness transition temperature T0. The estimation method in E1921-11 is valid only for macroscopically homogeneous steels. If the steel is inhomogeneous, the maximum likelihood method applied in E1921-11 becomes unreliable. Here, a simple screening criterion, based on the SINTAP lower-tail estimation method, is proposed, and the efficiency and limitations of the criterion are shown for a variety of different types of inhomogeneity.


    Paper ID: JTE104241

    DOI: 10.1520/JTE104241

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    Author
    Title Inhomogeneity Screening Criterion for the ASTM E1921 T0 Estimate Based on the SINTAP Lower-Tail Methodology
    Symposium , 0000-00-00
    Committee E08