Determination of the threshold values for corrosion fatigue crack growth rate of pressure vessel steels in PWR primary water
Conference
·
OSTI ID:48090
- Technical Research Centre of Finland, Espoo (Finland)
Corrosion fatigue crack growth rates over a range of frequencies from 10 Hz to 0.00001 Hz in two materials that have exhibited low-rate (A508 Class 3) and high-rate (A533B) crack growth behaviour at 288{degrees}C were studied at 200{degrees}C in PWR primary water. The frequency values above which marked environmental enhancement was observed were determined. Also the threshold values in terms of {Delta}K{sub th}, above which the marked environmental enhancement was observed in the crack growth rate, were determined both for A533B steel and Soviet pressure vessel steels with certain test parameters. Based on the extensive fractography the crack growth rate results are discussed mechanistically.
- OSTI ID:
- 48090
- Report Number(s):
- CONF-910808--
- Country of Publication:
- United States
- Language:
- English
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