Abstract
Following the previous report, FE analyses on DC electrical potential drop (PD) method were conducted. In order to investigate the applicability of the PD method to high temperature crack growth under combined stress conditions, the effects of crack angle, crack opening displacement and crack bending on the PD were investigated computationally. The calibration of PD method for crack growth under combined stress conditions was formulated. This calibration was applied to the experimental results of high temperature fatigue crack growth tests for stainless steel SUS304 at 650℃. It was clarified that high temperature fatigue crack growth in both tensile type and shear type can be evaluated by this calibration of PD method.
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