Volume 3, Issue 2 (February 2006)

    Analysis of Creep Crack Initiation and Growth in Different Geometries for 316H and Carbon Manganese Steels

    (Received 2 May 2005; accepted 7 September 2005)

    Published Online: 2005

    CODEN: JAIOAD

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    Abstract

    Results obtained from a European collaborative project aimed at producing a draft code of practice for creep crack growth testing are presented. The tests were performed on an Austenitic Type 316H Stainless Steel at 550°C and a carbon manganese steel at 400°C. A range of specimen test geometries has been examined. These are the single edge notched specimen in tension and bending, the double edge notched specimen in tension, the middle cracked specimen in tension, and the C-shaped specimen in tension. The results obtained are compared to those obtained using the standard compact tension specimen following the ASTM Standard Test Method for Measurement of Creep Crack Growth Rates in Metals (E 1457). Creep crack creep growth rates and initiation times have been correlated with the fracture mechanics parameter C*. The applicability of the stress intensity factor K to describe the creep cracking behavior is also assessed. Recommendations are made to support the use of different geometries in creep crack growth and/or creep crack initiation testing.


    Author Information:

    Davies, CM
    Imperial College London, London,

    Mueller, F
    Institute of Materials Technology, Darmstadt University of Technology,

    Nikbin, KM
    Imperial College London, London,

    O'Dowd, NP
    Imperial College London, London,

    Webster, GA
    Imperial College London, London,


    Stock #: JAI13220

    ISSN: 1546-962X

    DOI: 10.1520/JAI13220

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    Title Analysis of Creep Crack Initiation and Growth in Different Geometries for 316H and Carbon Manganese Steels
    Symposium Fatigue and Fracture Mechanics: 35th Volume, 2005-05-20
    Committee E08