A test apparatus was developed to study the interaction between corrosion fatigue (CF) and stress corrosion cracking (SCC) in high-temperature water simulated boiling water reactor environment. Tests were conducted using 1/2T-CT samples of both low alloy and sensitized stainless steels under 3 different types of loading at 0.2–8 ppm in dissolved oxygen concentrations at 563 K in water. Type 1 was a normal cyclic loading test of constant amplitude, Type 2 a monotonic constant loading rate test, and Type 3 a combination of Type 1 + Type 2 loading modes. In the low alloy steel, no striking interaction was observed between CF and SCC, whereas in the case of Type 3 loading condition crack growth rates of the sensitized stainless steel were as much as 3 times higher than those for Type 1 + Type 2. The mechanism of the CF and SCC interaction is discussed.
CF/SCC Interaction on Structural Materials for LWR in High Temperature Water
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Katada, Y, & Ohashi, S. "CF/SCC Interaction on Structural Materials for LWR in High Temperature Water." Proceedings of the ASME 2002 Pressure Vessels and Piping Conference. Pressure Vessel and Piping Codes and Standards. Vancouver, BC, Canada. August 5–9, 2002. pp. 165-170. ASME. https://doi.org/10.1115/PVP2002-1233
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