Abstract

The evaluation of CTOD tearing resistance is required by several strain based defect assessment procedures. To that extent, the use of SENT testing is widely advised as the constraint matches that of pressurized pipes. This indicates the need for well validated testing methods. This paper discusses two single specimen techniques for the evaluation of tearing resistance using clamped SENT specimens: the unloading compliance (UC) and the direct current potential drop (DCPD) technique. From the results of tests carried out on a variety of both base metal and welded specimens, both methods show a comparable accuracy and scatter.

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