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    Specimen Size Effects on J-R Curves for RPV Steels


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    This study examined the effect of specimen size on J-R curves for reactor pressure vessel (RPV) steels. Overall comparisons for monolithic materials (base plate and forging) indicated that no significant size effect is apparent, using standard formulations for the J-integral within commonly accepted validity bounds. However, materials that are composite in nature, such as weld materials, or exhibit macro-scale inhomogeneities gave significant differences in JR curve trends for different sizes of specimens.


    fracture toughness, size effect, J-R, curve, pressure vessel steel, J, -integral

    Author Information:

    Hiser, AL
    Materials engineer, United States Nuclear Regulatory Commission, Washington, DC,

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP18030S