Microstructural characterization of primary coolant pipe steel

Conference · Wed Jan 01 00:00:00 EST 1986

OSTI ID:5503689

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 primary coolant pipe stainless steel after long term thermal aging. The cast duplex microstructure consisted of austenite with 15% delta-ferrite. Investigation of the aged material revealed that 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.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5503689
• Report Number(s): CONF-860752-1; ON: DE86012631; TRN: 86-026128
• Resource Relation: Conference: 33. international field emission symposium (IFES), Berlin, F.R. Germany, 6 Jul 1986; Other Information: Portions of this document are illegible in microfiche products
• 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
AGING
MICROSTRUCTURE
AUSTENITE
ELECTRON MICROSCOPY
FERRITE
ION MICROSCOPY
OPTICAL MICROSCOPY
PIPES
ALLOYS
CARBON ADDITIONS
CHROMIUM ALLOYS
COOLING SYSTEMS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ENERGY SYSTEMS
IRON ALLOYS
IRON BASE ALLOYS
MICROSCOPY
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
STEELS
TESTING
WATER COOLED REACTORS
WATER MODERATED REACTORS
360102* - Metals & Alloys- Structure & Phase Studies
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled