Radiation-induced phosphorus segregation in austenitic and ferritic alloys

Conference · Thu Sep 01 04:00:00 EDT 1983

OSTI ID:5749681

Brimhall, J L; Baer, D R; Jones, R H

The radiation induced surface segregation (RIS) of phosphorus in stainless steel attained a maximum at a dose of 0.8 dpa then decreased continually with dose. This decrease in the surface segregation of phosphorus at high dose levels has been attributed to removal of the phosphorus layer by ion sputtering. Phosphorus is not replenished since essentially all of the phosphorus within the irradiation zone has been segregated to the surface. Sputter removal can explain the previously reported absence of phosphorus segregation in ferritic alloys irradiated at high doses (> 1 dpa) since irradiation of ferritic alloys to low doses has shown measurable RIS. This sputtering phenomenon places an inherent limitation to the heavy ion irradiation technique for the study of surface segregation of impurity elements. The magnitude of the segregation in ferritics is still much less than in stainless steel which can be related to the low damage accumulation in these alloys.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5749681
• Report Number(s): PNL-SA-11321; CONF-830942-53; ON: DE84000903
• Country of Publication: United States
• Language: English

Related Subjects

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ALLOYS
AUSTENITIC STEELS
CHARGED PARTICLES
ELEMENTS
FERRITIC STEELS
HEAVY IONS
IONS
IRON ALLOYS
IRON BASE ALLOYS
IRRADIATION
NONMETALS
PHOSPHORUS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
STEELS