Experimental study on crack growth behavior for austenitic stainless steel in high temperature pure water
Crack growth behavior of Type 304 stainless steel in a simulated BWR water environment was investigated for the quantitative characterization of subcritical flaw growth in BWR piping systems. Crack propagation rates under corrosion fatigue and stress corrosion cracking were generated using compact specimens. The effects of several parameters on the rates were discussed. Furthermore, surface crack growth behavior was examined under different modes of cyclic loading, and results were discussed in comparison with compact specimen data. The corrosion fatigue crack propagation rates strongly depended on the frequency and the stress ratio. The rates bacame higher as the frequency lowered and the stress ratio increased. No effect from dissolved oxygen concentration and heat treatment of the steel was observed in tests, where transgranular cracking mainly took place. Stress corrosion cracking rate data indicated K/sub ISCC/ was above 15 MPa.m/sup 1/2/. On the other hand, surface crack growth behavior included scattered crack propagation rates. However, the relationship between da/dN and ..delta..K was basically similar to that obtained in the compact specimens, except under given test conditions, where the acceleration for the crack growth rate at a crack tip on the panel surface was different from that at the deepest point.
- Research Organization:
- Research and Development Center, Toshiba Corp., Saiwaiku, Kawasaki
- OSTI ID:
- 5539465
- Journal Information:
- J. Pressure Vessel Technol.; (United States), Vol. 108:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
BWR TYPE REACTORS
PIPES
REACTOR COOLING SYSTEMS
CORROSION FATIGUE
CRACK PROPAGATION
STRESS CORROSION
STAINLESS STEEL-304
DEFECTS
DISSOLVED GASES
FEEDWATER
FREQUENCY DEPENDENCE
HEAT TREATMENTS
MATERIALS TESTING
OXYGEN
PRESSURE EFFECTS
RESEARCH PROGRAMS
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COOLING SYSTEMS
CORROSION
CORROSION RESISTANT ALLOYS
ELEMENTS
ENERGY SYSTEMS
FATIGUE
FLUIDS
GASES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HYDROGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
NICKEL ALLOYS
NONMETALS
OXYGEN COMPOUNDS
REACTOR COMPONENTS
REACTORS
SOLUTES
STAINLESS STEELS
STEELS
TESTING
WATER
WATER COOLED REACTORS
WATER MODERATED REACTORS
210100* - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
360105 - Metals & Alloys- Corrosion & Erosion