Abstract
Void swelling at 500°C and irradiation creep at 300°C in a pure Fe-Cr-Ni-Mo alloy of Type 316 stainless steel composition were measured at doses up to 0.4 dpa under uniaxial compressive or tensile stress up to 100 MPa. The irradiation creep rate under compression was nearly equal in its absolute value to that under tension. Neither the mean diameter nor the total number density of voids showed, within the experimental error, any noticeable dependence on the stress direction. This indicates an effect of the deviatoric stress component rather than the hydrostatic stress on void nucleation. Implications of this finding on the various proposed mechanisms of stress-effects on swelling are discussed.
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