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- W137708468 abstract "Because chromium-molybdenum martensitic steels have excellent resistance to swelling when irradiated in fast reactors, steels such as 9Cr-1MoVNb and 12Cr-1MoVW are candidates for both fast reactor and fusion reactor applications. To determine the effect of helium on the martensitic steels, nickel-doped 9Cr-1MoVNb and 12Cr-1MoVW steel specimens were irradiated in the High-Flux Isotope Reactor (HFIR). Results were compared with results for undoped steels irradiated similarly and undoped and doped steels irradiated in EBR-II, where little helium was generated. At 300 and 400{degree}C, results indicated that helium affected the strength increase. No helium effect was apparent on specimens irradiated at 500{degree}C. In a second experiment, the 9Cr-1MoVNb and 12Cr-1MoVW steels with and without nickel additions were irradiated in the HFIR at 50{degree}C, the HFIR coolant temperature. Although the strength increases caused by irradiation of the martensitic steels could generally be accommodated by designers, hardening also affects fracture toughness. It is this latter effect that causes the most concern. If helium causes an increase in strength as observed in tensile studies, then such helium could also affect the fracture and impact properties. These studies therefore indicate that, in addition to the displacement damage, the effect of helium must be considered for the designmore » of a fusion reactor.« less" @default.
- W137708468 created "2016-06-24" @default.
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- W137708468 date "1989-01-01" @default.
- W137708468 modified "2023-09-24" @default.
- W137708468 title "Tensile property behavior of irradiated martensitic alloys" @default.
- W137708468 hasPublicationYear "1989" @default.
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