Techniques developed to evaluate the fracture toughness offast breeder reactor duct. [Use of J-integral tests]
Large changes in strength and ductility of metals after irradiation are known to occur. The fracture toughness of irradiated metals, which is related to the combined strength and ductility of a material, may be significantly reduced and the potential for unstable crack extension increased. Therefore, the resistance of cladding and duct materials to fracture after exposure to fast neutron environments is of concern. Existing Type 316 stainless steel irradiated ducts are relatively thin and since this material retains substantial ductility, even after irradiation, the fracture behavior of the duct material cannot be analyzed by linear elastic fracture mechanics techniques. Instead, the multispecimen R-curve method and J-integral analysis were used to develop an experimental approach to evaluate the fracture toughness of thin breeder reactor duct materials irradiated at elevated temperatures. Alloy A-286 was chosen for these experiments because the alloy exhibits elastic/plastic behavior and the fracture toughness data of thicker (12 mm) specimens were available for comparison. Technical problems associated with specimen buckling and remote handling were treated in this work. The results are discussed in terms of thickness criterion for plane strain.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-C-14-2170
- OSTI ID:
- 6018558
- Report Number(s):
- HEDL-SA-1775; CONF-790910-4; TRN: 79-021459
- Resource Relation:
- Conference: Symposium on calculation of phase diagrams and thermochemistry, Milwaukee, WI, USA, 17 Sep 1979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
ALLOY-A-286
FRACTURE PROPERTIES
PHYSICAL RADIATION EFFECTS
STAINLESS STEEL-316
CLADDING
CRACKS
DUCTILITY
DUCTS
ELASTICITY
FBR TYPE REACTORS
PLASTICITY
TESTING
THICKNESS
WELDED JOINTS
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
BREEDER REACTORS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
DEPOSITION
DIMENSIONS
EPITHERMAL REACTORS
FAST REACTORS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MATERIALS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
RADIATION EFFECTS
REACTORS
STAINLESS STEELS
STEELS
SURFACE COATING
TENSILE PROPERTIES
TITANIUM ALLOYS
360103* - Metals & Alloys- Mechanical Properties
210500 - Power Reactors
Breeding
360106 - Metals & Alloys- Radiation Effects