Tensile Properties of 12% Cold-Worked Type 316 Stainless Steel Irradiated in EBR-II Under Lower-Dose-Rate Conditions to High Fluence

Abstract

The effects of lower-dose-rate irradiation on the tensile properties of 12% cold-worked type 316 stainless steel hexagonal ducts which were irradiated in the outer rows of EBR-II were investigated. Tension tests were conducted on a total of seventeen irradiation conditions. Fractographic examinations were performed on four irradiation conditions which were selected based on the results of tension tests. The results of the tension tests and fractographic examinations showed that the 316 stainless steel hexagonal ducts exhibited irradiation hardening typical to 316 stainless steels irradiated at similar temperatures and retained respectable ductility after the irradiation. There was no significant effect of dose rate on tensile properties for the range of irradiation conditions of this study.

ANL/CRIEPI collaborative program for evaluation of irradiated EBR-II stainless steels.

“…The ducts from this study and that of Fish came from different lots of steel and the compositional differences may have caused a difference in yield and ultimate tensile strength. Table 5 compares the 1 dpa yield strength from three different experiments, the 20% cold-worked material irradiated in row 8 of EBR-II in this study, the 20% cold-worked material irradiated in row 2 of EBR-II in the Fish study, and 12% coldworked material irradiated in row 9 of EBR-II [11]. The difference between the largest and smallest yield strength in Table 5 is about 80 MPa.…”

Nuclear energy plant optimization (NEPO) final scientific/technical report

“…A full description of sample preparation, test, and analysis steps can be found in references [3,[30][31][32]. The strain rate for 20% cold-worked tensile tests was 4 x 10 -5 /s.…”