Microstructural aspects of the thermal treatment of Inconel Alloy 600
Journal Article
·
· Metallography; (United States)
It has been reported that the stress corrosion cracking (SCC) resistance of Inconel 600 can be improved by a thermal treatment in the carbide precipitation regime. Microstructural changes that occur when Inconel 600 is thermally treated in the temperature range 593-870/sup 0/C (1100 to 1600/sup 0/F) have therefore been studied in order to provide a better understanding of the factors controlling the SCC resistance of thermally treated Inconel 600. A total of 13 thermal treatments were used to provide a wide range of grain-boundary microstructures. Microstructural analysis concentrated on three aspects of grain-boundary structure: (1) grain-boundary precipitate morphology, (2) grain-boundary chromium depletion, and (3) grain-boundary segregation. There was a wide range of grain-boundary precipitate morphologies with the associated chromium depletion being prevalent in material annealed at the lower temperatures for the shorter times. Phosphorus was segregated to the grain boundaries in all the thermally treated material. These microstructural observations were correlated with previously published data on the SCC resistance in caustic and lead-doped water environments. The maximum improvement in intergranular SCC resistance correlated with the presence of a semicontinuous grain-boundary carbide precipitate.
- Research Organization:
- Westinghouse Research and Development Center, Pittsburgh, PA
- OSTI ID:
- 5409684
- Journal Information:
- Metallography; (United States), Journal Name: Metallography; (United States) Vol. 13:1; ISSN MEIJA
- Country of Publication:
- United States
- Language:
- English
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·
OSTI ID:4165762
Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
BOILERS
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANCE
CRACKS
CRYSTAL STRUCTURE
ELEMENTS
GRAIN BOUNDARIES
HEAT TREATMENTS
INCONEL 600
INCONEL ALLOYS
IRON ALLOYS
MICROSTRUCTURE
MORPHOLOGY
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
NONMETALS
PHOSPHORUS
PRECIPITATION
SEPARATION PROCESSES
STEAM GENERATORS
STRESS CORROSION
TUBES
VAPOR GENERATORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
BOILERS
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANCE
CRACKS
CRYSTAL STRUCTURE
ELEMENTS
GRAIN BOUNDARIES
HEAT TREATMENTS
INCONEL 600
INCONEL ALLOYS
IRON ALLOYS
MICROSTRUCTURE
MORPHOLOGY
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
NONMETALS
PHOSPHORUS
PRECIPITATION
SEPARATION PROCESSES
STEAM GENERATORS
STRESS CORROSION
TUBES
VAPOR GENERATORS