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A comprehensive creep experiment on AISI 316 stainless steel involving irradiation at ∼400°C to 130 dpa has been completed. The influence of material and environmental variables on the creep and swelling of this steel at ∼400°C is shown to have many similarities to the behavior exhibited in an earlier experiment conducted at ∼550°C, but significant differences are also apparent. These arise because the 400°C experiment was clearly conducted in a regime dominated by the kinetics of point defect recombination, whereas the 550°C experiment was conducted in the sink-dominated regime. At 400°C, it is also shown that severe embrittlement arises concurrent with ∼10% swelling, requiring careful handling of test specimens and structural assemblies at room temperature.
316 stainless steel, neutron irradiation, irradiation creep, void swelling, embrittlement, high fluence
Porter, Douglas L.
Metallurgist, Argonne National Laboratory, Falls, ID
Wood, Elon L.
Scientific associate, Argonne National Laboratory, Falls, ID
Garner, Frank A.
Staff scientist, Pacific Northwest Laboratory, Richland, WA