SEDL / STP / STP1125-EB / STP17942S

Postirradiation Strength and Deformation of Ferritic Fe-Cr Binary Alloys

Hamilton, ML
Senior scientist and staff scientist, Pacific Northwest Laboratory, Richland, WA

Gelles, DS
Senior scientist and staff scientist, Pacific Northwest Laboratory, Richland, WA

Pages: 9    Published: Jan 1992

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Abstract

Six binary Fe-Cr alloys with chromium levels ranging from 3 to 18% were tensile tested at room temperature following irradiation at 365, 403, and 574°C to doses of 7.4, 37.7, and 34.3 dpa, respectively. Irradiation at 365 and 403°C produced significant strengthening at all chromium levels, with concurrent reductions in ductility. Strength levels were insensitive to composition, irradiation temperature, or neutron exposure. Irradiation at 574°C produced strength increases at only the two highest chromium levels. The results are attributed to dislocation loop and void development at 365 and 403°C, and phase instability at 574°C. No evidence for channel fracture was found.