Prediction of aging degradation of cast stainless steel components in LWR systems
A procedure and correlations are presented for predicting Charpy-impact energy, tensile flow stress, fracture toughness J-R curve, and J{sub IC} of aged cast stainless steels from known material information. The ``saturation`` impact strength and fracture toughness of a specific cast stainless steel, i.e., the minimum value that would be achieved for the material after long-term service, is estimated from the chemical composition of the steel. Mechanical properties as a function of time and temperature of reactor service are estimated from impact energy and flow stress of the unaged material and the kinetics of embrittlement, which are also determined from chemical composition. The J{sub IC} values are determined from the estimated J-R curve and flow stress. Examples of estimating mechanical properties of of cast stainless steel components during reactor service are presented. A common ``predicted lower-bound` J-R curve for cast stainless steels of unknown chemical composition is also defined for a given grade of steel, ferrite content, and temperature.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- Nuclear Regulatory Commission, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10154056
- Report Number(s):
- ANL/CP-75791; CONF-920375-24; ON: DE92014848
- Resource Relation:
- Conference: Aging research information conference,Rockville, MD (United States),24-27 Mar 1992; Other Information: PBD: Mar 1992
- Country of Publication:
- United States
- Language:
- English
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Long-term embrittlement of cast duplex stainless steels in LWR systems
Related Subjects
36 MATERIALS SCIENCE
STAINLESS STEELS
AGING
PHYSICAL RADIATION EFFECTS
PWR TYPE REACTORS
REACTOR COMPONENTS
BWR TYPE REACTORS
FRACTURE PROPERTIES
EMBRITTLEMENT
MECHANICAL PROPERTIES
210100
210200
360106
360103
POWER REACTORS
NONBREEDING
LIGHT-WATER MODERATED
BOILING WATER COOLED
POWER REACTORS
NONBREEDING
LIGHT-WATER MODERATED
NONBOILING WATER COOLED
RADIATION EFFECTS