Modeling grain boundary microchemistry related to IASCC (irradiation-assisted stress corrosion cracking)

Conference · Sat Apr 01 04:00:00 EST 1989

OSTI ID:6115604

Simonen, E. P.; Jones, R. H.

Radiation effects on grain boundary and near grain boundary microchemistries are modeled and compared to measured radiation effects. Nonequilibrium diffusion mechanisms are shown to be consistent with measured phosphorus impurity segregation and measured chromium depletion resulting from irradiation. Radiation enhanced equilibrium segregation (impurity enrichment) and radiation enhanced chromium depletion (sensitization) kinetics are predicted to be sufficient to promote equilibrium effects but measurements do not confirm the radiation enhanced mechanisms. Likely causes for the discrepancy are solute trapping and precipitation effects in the matrix promoted by irradiation. Ion and neutron irradiation of austenitic steels are evaluated relative to causes for irradiation-assisted stress corrosion cracking (IASCC). 35 refs., 11 figs.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6115604
• Report Number(s): PNL-SA-16474; CONF-890437-12; ON: DE89011214
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
AUSTENITIC STEELS
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
CHROMIUM
CORROSION
CRACKS
CRYSTAL STRUCTURE
DIFFUSION
ELEMENTS
GRAIN BOUNDARIES
IMPURITIES
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
METALS
MICROSTRUCTURE
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PHYSICAL RADIATION EFFECTS
PNICTIDES
RADIATION EFFECTS
SEGREGATION
STEELS
STRESS CORROSION
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS