Abstract
This paper presents results of a corrosion cracking test of specimens of irradiated austenitic chromium- nickel steels of grades 321 (Kh18N10T), 316 (06Kh16N11M3) and 304 (02Kh18N9). Specimens were irradiated to different damage dose from 4.5 to 150 dpa. The tests were carried out in autoclaves in the water environment simulating a coolant of the first circuit of WWER reactors at temperatures of 290–315°С. The influence of the damage dose and the neutron energy spectrum on the tendency of steels to stress corrosion cracking (SCC) is analyzed. The dominant SCC mechanisms for various austenitic steels are determined. Loading modes effects on the SCC resistance of specimens irradiated to the same damage dose are compared.
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