Chloride-Induced Stress Corrosion Cracking Tester for Austenitic Stainless Steel

Abstract

In this paper, a new experimental tester was designed to improve the stability in load measurement and imposed environment for chloride-induced stress corrosion cracking (CISCC) testing of austenitic stainless steels that are used to construct spent nuclear fuel dry storage canisters. By fabricating compact tension specimens using the UNS S30400 stainless steel, the test is conducted by immersing the specimen in 5 % salinity artificial seawater at 50°C. From the measured load, the stress intensity factor is calculated and the crack length is measured by an optical microscope. The present experimental data confirm the existing findings that the CISCC growth rate is insensitive to the stress intensity factor but is dominantly affected by the specimen surface temperature. The crack growth rate also confirms the existing model.

Large Plate Experiment of Chloride-induced Stress Corrosion Cracking in Spent Nuclear Fuel Storage Canisters

“…The resulting CGRs for Type 304 base metal using semicircular precracked specimens are about 9.3 × 10 −10 m/s [17,18] and the SIF loading range is between 2 and 20MPa√m 4 , as shown in Figure 19. Also included in Figure 19 are the recent Korea University test data using S30400 stainless steel [21,22]. The test results were obtained by immersing the specimens in 5 % salinity artificial seawater at 50 ℃.…”

Effect of Stress Magnitude on Pit Growth Rate of 304 Austenitic Stainless Steel in Chloride Environments

“…As a result of compliance change due to the crack, the load drop was observed. The immersion test with constant displacement-type was conducted by Jeong et al [7] using a C(T) specimen at 50 • C and 5% salinity. The cracked surface showed the transgranular-type CISCC penetrated by the chloride.…”