Microstructural evolution in medium copper low alloy steels irradiated in a pressurized water reactor and a material test reactor
作者： K. Fukuya , K. Ohno , H. Nakata , S. Dumbill , J.M. Hyde
DOI: 10.1016/S0022-3115(02)01675-6
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摘要: Abstract A533B steels containing 0.12% and 0.16% Cu were irradiated to 3×1023 6×1023 n/m2 (E>1 MeV) at 290 °C in a pressurized water reactor (PWR) material test (MTR). Microstructural changes examined using atom probe, small angle neutron scattering, field emission gun scanning transmission electron microscopy post-irradiation annealing (PIA) coupled with positron annihilation (PA) hardness testing (Hv). rich precipitates had enriched core surrounding Ni, Mn Si region the atomic composition was Fe–(7–16)Cu–(2–8)Mn–(0–4)Ni–(0–4)Si. The size number density of residual concentration matrix almost saturated above n/m2. Low flux irradiation PWR produced slightly larger lower higher precipitates. PIA (PA Hv) examination showed that vacancy type defects after more stable effective for hardening than those MTR irradiation.
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