Microstructural characterization of irradiated Fe-Cu-Ni-P model steels
The microstructure of Fe-Cu-Ni-P model pressure vessel steels after neutron irradiation and thermal aging has been characterized by atom probe field-ion microscopy and augmented by transmission electron microscopy. High densities of small, roughly spherical or disc shaped copper clusters/precipitates were observed in the neutron irradiated alloys that contained copper. Small spherical phosphorus clusters were observed in the irradiated copper-free alloys, and copper phosphides were observed in a high phosphorus Fe-Cu-Ni-P alloy. None of these clusters/precipitates were observed in the thermally aged materials. The increases in the tensile and yield strengths that were observed after neutron irradiation resulted from these clusters and other lattice defects. 14 refs., 8 figs., 2 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Florida Univ., Gainesville (USA). Dept. of Materials Science and Engineering; Materials Engineering Associates, Inc., Lanham, MD (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5956965
- Report Number(s):
- CONF-870839-5; ON: DE88000573
- 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
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Related Subjects
IRON BASE ALLOYS
MICROSTRUCTURE
PHYSICAL RADIATION EFFECTS
PRESSURE VESSELS
MATERIALS TESTING
STEELS
AGING
CARBON ADDITIONS
COMPARATIVE EVALUATIONS
COPPER ADDITIONS
CRYSTAL DEFECTS
CRYSTAL LATTICES
EMBRITTLEMENT
ION MICROSCOPY
MANGANESE ADDITIONS
NICKEL ADDITIONS
PHOSPHORUS ADDITIONS
PROBES
SEGREGATION
TENSILE PROPERTIES
TRANSMISSION ELECTRON MICROSCOPY
YIELD STRENGTH
ALLOYS
CONTAINERS
COPPER ALLOYS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
IRON ALLOYS
MANGANESE ALLOYS
MECHANICAL PROPERTIES
MICROSCOPY
NICKEL ALLOYS
RADIATION EFFECTS
TESTING
360106* - Metals & Alloys- Radiation Effects
360102 - Metals & Alloys- Structure & Phase Studies