【7/12更新】2022年4月1日からのCiNii ArticlesのCiNii Researchへの統合について

Embrittlement in Neutron Irradiated Niobium

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This paper discusses the effect of neutron irradiation on the embrittlement of niobium. The irradiation was carried out at about 100℃ to a neutron does of 2.9×10^<20>n/cm^2 (<1 MeV) and measurements were made of the yield stress, fracture stress and fracture strain in the temperature range from liquid nitrogen to room temperature. The interaction of dislocations produced by deformation with irradiation-induced defects was studied by transmission electron microscopy. The fracture surfaces were examined using a scanning electron microscope. The brittle fracture stress was evaluated under theory of the dislocation and by the strain-energy method. Based on the results obtained, a possible mechanism for the fracture in neutron irradiated niobium was discussed.

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