Characterization of fine-scale microstructures in aged primary coolant pipe steels. [CF 8 and CF 8M stainless steels]

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6149325

Miller, M K; Bentley, J

Atom probe field-ion microscopy, analytical electron microscopy, and optical microscopy have been used to investigate the changes that occur in the microstructure of cast CF 8 and CF 8M primary coolant pipe stainless steels after long-term aging. The cast duplex microstructure consisted of austenite with 15% delta-ferrite. Upon aging the ferrite spinodally decomposed into a fine scaled network of ..cap alpha.. and ..cap alpha..'. A fine G-phase precipitate was also observed in the ferrite. The observed degradation in mechanical properties is probably a consequence of the spinodal decomposition in the ferrite. 7 refs., 14 figs., 4 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6149325
• Report Number(s): CONF-870839-3; ON: DE88000340
• Resource Relation: Conference: 3. international symposium on environmental degradation of materials in nuclear power systems: water reactors, Traverse City, MI, USA, 30 Aug 1987; Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
PRIMARY COOLANT CIRCUITS
MATERIALS TESTING
PWR TYPE REACTORS
STAINLESS STEELS
MICROSTRUCTURE
AGING
AUSTENITIC STEELS
CARBON ADDITIONS
CHROMIUM ALLOYS
DISLOCATIONS
ELECTRON MICROSCOPY
FERRITE
ION MICROSCOPY
IRON ALLOYS
LATTICE PARAMETERS
MANGANESE ALLOYS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
OPTICAL MICROSCOPY
PRECIPITATION
SILICIDES
SILICON ALLOYS
SULFUR ADDITIONS
ALLOYS
COOLING SYSTEMS
CORROSION RESISTANT ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ENERGY SYSTEMS
IRON BASE ALLOYS
LINE DEFECTS
MICROSCOPY
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
SEPARATION PROCESSES
SILICON COMPOUNDS
STEELS
TESTING
WATER COOLED REACTORS
WATER MODERATED REACTORS
360102* - Metals & Alloys- Structure & Phase Studies
210100 - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled