Fine-scale microstructural characterization of pressure vessel steels and related materials using APFIM (atom probe field-ion microscope). [Atom probe field-ion microscopy]

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:5102999

Miller, M K; Burke, M G

Atom probe field-ion microscopy has been used to characterize the ultra fine-scale microstructure of neutron-irradiated A302B and A212B pressure vessel steels, A533B submerged arc welds, and several model Fe/endash/Cu Alloys. The atomic spatial resolution of this technique permits a complete microstructural and chemical description of the ultra-fine features that control the mechanical properties to be made. A variety of ultra fine-scale features including roughly spherical and disc-shaped copper precipitates and clusters, copper atmospheres, copper phosphides, phosphorus clusters, spherical and rod-shaped molybdenum carbides, molybdenum phosphides, disc-shaped molybdenum nitrides, and iron nitride precipitates were observed in these materials. The presence of these features was found to be material dependent. The atom probe also revealed a complex pattern of segregation and precipitation at grain boundaries and segregation to precipitate-ferrite interfaces. 22 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5102999
• Report Number(s): CONF-880613-6; ON: DE88009709
• Resource Relation: Conference: 14. international symposium on effects of radiation on materials, Andover, MA, USA, 27 Jun 1988
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER ALLOYS
MICROSTRUCTURE
PHYSICAL RADIATION EFFECTS
IRON ALLOYS
STEEL-ASTM-A302
STEEL-ASTM-A533-B
WELDED JOINTS
ION MICROSCOPY
PRESSURE VESSELS
ALLOYS
CARBON STEELS
CONTAINERS
CRYSTAL STRUCTURE
IRON BASE ALLOYS
JOINTS
MICROSCOPY
RADIATION EFFECTS
STEELS
360106* - Metals & Alloys- Radiation Effects