Abstract
Damage structure in austenitic stainless steels irradiated by 40-keV helium ions under stress at isothermal and thermocyclic conditions as well as those resulting from post-irradiation high temperature deformation have been studied using the techniques of transmission electron microscopy, scanning electron microscopy and the method of thermodesorption of helium. The parameters of cavities formed and the degree of swelling of the near-surface layer were shown to depend considerably on the level of applied external stresses and temperature cycling. A correlation between the rate of helium release and the extent of sample deformation in the creep test has been found.
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