Research has been conducted to develop improved procedures for evaluating the resistance of steel products to sulfide stress corrosion cracking (SSCC). In the present work, conventional threshold stress data (σth) were compared for a series of selected steels with the crack initiation stress intensities (Kinit) obtained by using a rising load stress intensity test procedure on an edge notched cantilever beam specimen. The results may be summarized as follows: (1) A simple straight line relationship was found between the conventional test data and the data obtained by using the rising load procedure; (2) a significant saving in testing time (35 fold) can be achieved by using the rising load procedure; and (3) the crack initiation parameter (Kinit) is a function of displacement rate down to a critical rate, below which independence is observed. Because of the speed and simplicity of the new test procedure, it is admirably suited for use in laboratory studies of SSCC.

Subject
Water, Materials, Stress intensity, Crack initiation, Cantilever beams, Stress, Deflection, Steel, Sulfide stress cracking, Alloys, Stress corrosion cracking, Test specimen, Hydrogen
© 1979 National Association of Corrosion Engineers
1979
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