Abstract
This study measured the crack growth of perforated plate of SUS304 stainless steel in creep fatigue test as a clue to evaluate the creep fatigue characteristics of a structure member under elevated temperature. Measured was the crack length by using pictures which were photographed with the CCD video camera at every cycle. From the measurement it is found that the total crack growth rate of a creep fatigue increases sharply depending on the period of time or loading rate. And cracks grow up at both sides around the hole, but the growth of each crack may not be symmetric. When the diameter of the test specimen changes, J-integration will be obtained.
