Fatigue Crack Growth Rates in Pressure Vessel and Piping Steels in LWR (Light Water Reactor) Environments.

摘要

The measurement of fatigue crack growth rates for pressure vessel and piping steels in high-temperature, pressurized water has been carried out using compact fracture specimens. Over the last ten years, the programs sponsored by the NRC and carried out at the Naval Research Laboratory and Materials Engineering Associates have provided data for over three hundred tests of these specimens, which have been published in a series of NUREG topical reports and annual reports. This is the final report in this series and describes briefly the significant findings of the program, reports on the most recent data which have been acquired, and indicates some directions for future research in this area. Further testing of compact specimens has been nearly phased out, and the program has turned more towards applications-oriented tasks, such as variable cyclic amplitude testing, part-through crack geometry tests, and environmental effects on the stress-life curves.