Atomic level microstructural characterization by APFIM
Atom probe field ion microscopy has been used to characterize Ni aluminides in addition to changes in microstructure of pressure vessel steels as a result of exposure to neutron irradiation. Ultrafine intragranular Cu precipitates and P segregation to grain and lath boundaries have been quantified in the pressure vessel steels. In boron-doped Ni{sub 3}Al, the B additions were found to segregate to dislocations, low angle boundaries, antiphase boundaries, stacking faults, and grain boundaries. In boron-doped NiAl, B segregation to grain boundaries and ultrafine MB{sub 2} precipitates were observed. In Mo-doped NiAl, enrichments of Mo, C, N/Si, B, and Fe were observed at the grain boundaries together with Mo precipitates and low Mo matrix solubility.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Nuclear Regulatory Commission, Washington, DC (United States). Office of Nuclear Regulatory Research
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 391713
- Report Number(s):
- CONF-9609260-1; ON: DE97000184; CNN: NRC Inter-agency Agreement DOE 1886-8109-8L; TRN: 96:028476
- Resource Relation:
- Conference: ICMFM 96: international conference on microstructures and functions of materials, Tokyo (Japan), 9-11 Sep 1996; Other Information: PBD: [1996]
- 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