Use of Broken Charpy V-notch Specimens from a Surveillance Program for Fracture Toughness Determination

    Volume 3, Issue 2 (February 2006)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 13 December 2005

    Page Count: 7


    Scibetta, M
    SCK · CEN, Mol,

    Lucon, E
    SCK · CEN, Mol,

    Chaouadi, R
    SCK · CEN, Mol,

    van Walle, E
    SCK · CEN, Mol,

    Gérard, R
    Tractebel Engineering, Brussels,

    (Received 9 March 2004; accepted 14 August 2005)

    Abstract

    Broken Charpy specimens from the surveillance program of a Belgian nuclear power plant are used to obtain the fracture toughness in the transition regime using the master curve concept. Two approaches are used. The first one is based on the reconstitution of Charpy specimens that are subsequently precracked and tested in three-point bending. The second approach is an innovative one that makes use of miniature Compact Tension specimens, which are machined from the broken pieces of the original Charpy specimens. Both approaches lead to consistent results. The recently developed miniature Compact Tension design has the advantage to use less material and is less costly in terms of machining operation. For the material investigated in this research, the current regulation, based on a semi-empirical approach to obtain the lower bound fracture toughness, is demonstrated to be conservative as compared to the direct fracture toughness determination.


    Paper ID: JAI12450

    DOI: 10.1520/JAI12450

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    Author
    Title Use of Broken Charpy V-notch Specimens from a Surveillance Program for Fracture Toughness Determination
    Symposium Effects of Radiation on Materials: 22nd International Symposium, 2004-06-10
    Committee E10