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Influence of Neutron Irradiation at 55 exp 0 C on the Properties of Austenitic Stainless Steels

机译：55℃0℃中子照射对奥氏体不锈钢性能的影响

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Types 316 and 316 + 0.23 wt % Ti stainless steels and 16-8-2 weldment were irradiated in HFIR at 55 exp 0 C to fluences up to 1.35 x 10 exp 26 neutrons/m exp 2 (< 0.1 MeV), which produced up to 10.5 dpa and 520 at. ppM He. Examination showed no swelling, no cavities, no precipitates, but a high concentration of dislocations. Tensile tests showed large increases in the 35 exp 0 C strength properties, with the weldments the weakest of the materials. The ductility of all materials was reduced by the irradiation, the uniform elongation to only 0.4% in the cold-worked material. Tests at temperatures above the irradiation temperature showed an approach to unirradiated properties as the temperature was increased from 200 to 600 exp 0 C. Helium embrittlement at 700 exp 0 C severely reduced elongation. (ERA citation 06:032235)

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