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 language | English |
---|---|
Pages (from-to) | I/- |
Journal | Key Engineering Materials |
Volume | 183 |
State | Published - 2000 |
Externally published | Yes |
Event | 4th International Conference on Fracture and Strength of Solids - Pohang, South Korea Duration: Aug 16 2000 → Aug 18 2000 |