Microstructural characterization of irradiated PWR steels using the atom probe field-ion microscope
Atom probe field-ion microscopy has been used to characterize the microstructure of a neutron-irradiated A533B pressure vessel steel weld. The atomic spatial resolution of this technique permits a complete structural and chemical description of the ultra-fine features that control the mechanical properties to be made. A variety of fine scale features including roughly spherical copper precipitates and clusters, spherical and rod-shaped molybdenum carbide and disc-shaped molybdenum nitride precipitates were observed to be inhomogeneously distributed in the ferrite. The copper content of the ferrite was substantially reduced from the nominal level. A thin film of molybdenum carbides and nitrides was observed on grain boundaries in addition to a coarse copper-manganese precipitate. Substantial enrichment of manganese and nickel were detected at the copper-manganese precipitate-ferrite interface and this enrichment extended into the ferrite. Enrichment of nickel, manganese and phosphorus were also measured at grain boundaries.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Pittsburgh Univ., PA (USA). Dept. of Materials Science and Engineering
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6104817
- Report Number(s):
- CONF-870839-4; ON: DE88000341; TRN: 87-035091
- 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
Similar Records
An APFIM survey of grain boundary segregation and precipitation in irradiated pressure vessel steels
An APFIM survey of grain boundary segregation and precipitation in irradiated pressure vessel steels
Related Subjects
36 MATERIALS SCIENCE
42 ENGINEERING
PRESSURE VESSELS
WELDED JOINTS
PWR TYPE REACTORS
STEEL-ASTM-A533-B
ION MICROSCOPY
MICROSTRUCTURE
PHYSICAL RADIATION EFFECTS
TRANSMISSION ELECTRON MICROSCOPY
COPPER
FERRITES
GRAIN BOUNDARIES
IRON
IRRADIATION
MANGANESE
MECHANICAL PROPERTIES
MOLYBDENUM CARBIDES
MOLYBDENUM NITRIDES
NEUTRON FLUX
NICKEL
PHOSPHORUS
ALLOYS
CARBIDES
CARBON COMPOUNDS
CARBON STEELS
CONTAINERS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
ELEMENTS
FERRIMAGNETIC MATERIALS
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
JOINTS
MAGNETIC MATERIALS
MATERIALS
METALS
MICROSCOPY
MOLYBDENUM COMPOUNDS
NITRIDES
NITROGEN COMPOUNDS
NONMETALS
OXYGEN COMPOUNDS
PNICTIDES
RADIATION EFFECTS
RADIATION FLUX
REACTORS
REFRACTORY METAL COMPOUNDS
STEELS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
360106 - Metals & Alloys- Radiation Effects
360103 - Metals & Alloys- Mechanical Properties
420500 - Engineering- Materials Testing