Radiation damage of reactor pressure vessel steels studied by nondestructive methods

D. G. Park, T. S. Byun, Y. Y. Song, J. H. Hong, I. S. Kim

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

Effects of neutron dose on the mechanical and magnetic properties in SA508-3 nuclear pressure vessel steel using ball indentation test and magnetic Barkhausen noise (BN) measurements were studied. The samples were irradiated in a research reactor up to a dose of 1018 n/cm2 (E>1 MeV) at 70°C, and 4.5 × 1019 n/cm2 at 290°C. The change of mechanical properties showed a characteristic trend with neutron dose, especially near the plateau, rapid increase and slow increase. The BN profile in the specimen irradiated at 70°C decreased markedly, but that in the specimen irradiated at 290°C was hardly changed. The BN of the specimen irradiated at 70°C varied in a reverse manner against ball indentation results, a slow decrease up to a neutron dose of 1016 n/cm2, followed by a rapid decrease up to a dose of 1018 n/cm2. The change of mechanical properties and magnetic BN can be explained by the pinning effects of moving dislocations and domain walls from the irradiation induced defects.

Original languageEnglish
Pages (from-to)I/-
JournalKey Engineering Materials
Volume183
StatePublished - 2000
Externally publishedYes
Event4th International Conference on Fracture and Strength of Solids - Pohang, South Korea
Duration: Aug 16 2000Aug 18 2000

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