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- W2051228743 abstract "The fracture toughness degradation due to neutron irradiation was examined for the evaluation of the structural integrity of a nuclear reactor pressure vessel using four kinds of currently used heavy section manganese-molybdenum-nickel low alloy steels, which included the welded joint as well as the base metal. Neutron irradiation was conducted up to 2to 7×1019 n/cm2 > 1 MeV at 290°C in JMTR, and the embrittlement was mainly evaluated by the Charpy and fracture toughness tests using small three point bend specimens. From the results, the following can be pointed out: 1.(1) The elevations of the transition temperature of steels used, which are evaluated by 41 J of the Charpy absorbed energy, are within 50°C, and a quite high resistance against neutron irradiation embrittlement is observed.2.(2) The JIC fracture toughness and J - R curve of irradiated materials as well as unirradiated ones are successfully determined by a dc electrical potential method using a single specimen.3.(3) At the transition region, the increase of transition temperature (ΔRTNDT) at the 41 J level of the Charpy impact test is nearly equal to the shift at the 100 MPa m12 level of the fracture toughness test." @default.
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- W2051228743 date "1985-02-01" @default.
- W2051228743 modified "2023-09-25" @default.
- W2051228743 title "Evaluation of neutron irradiation embrittlement of heavy section nuclear reactor pressure vessel steels in terms of elastic-plastic fracture toughness" @default.
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- W2051228743 doi "https://doi.org/10.1016/0029-5493(85)90265-1" @default.
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