A Fractographic Technique for the Estimation of Initiation Fracture Toughness JIc for Ductile Materials

    Volume 22, Issue 4 (July 1994)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 7


    Srinivas, M
    Scientists, Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad,

    Kamat, SV
    Scientists, Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad,

    Rao, PR
    Honorary professor, Jawaharial Nehru Centre for Advanced Scientific Research, Bangalore,

    (Received 25 August 1993; accepted 14 February 1994)

    Abstract

    A single specimen fractographic technique based on critical stretch zone width measurements is suggested for the estimation of fracture toughness (JIc) for highly ductile materials. The salient feature of this technique is that it overcomes the problem of fatigue precracking and is able to predict the fracture toughness of a material using a blunt notch specimen. Fracture toughness tests on commercially pure Armco iron, nickel, and aluminum as well as Al-Mn based austenitic stainless steel and En28 steel were carried out to validate the method.


    Paper ID: JTE11838J

    DOI: 10.1520/JTE11838J

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    Author
    Title A Fractographic Technique for the Estimation of Initiation Fracture Toughness JIc for Ductile Materials
    Symposium , 0000-00-00
    Committee E08