Abstract

Type 316L stainless steel samples in both 20% cold-worked (cw) and recrystallised (re) conditions were irradiated with 19 MeV deuterons under torsional loading. The irradiation creep deformation was measured as a function of temperature from 80 to 400°C. At temperatures below 100°C, the creep curves of both materials are characterised by long-lasting strain transients during which the creep rate slows down before reaching a steady-state value. It is assumed that the total irradiation creep strain is composed of two components, a steady-state component γ s and a transient component γ t . When the steady-state creep rates are represented in an Arrhenius plot, they fit straight lines. Their slopes correspond to an activation energy of 0.11 eV for the irradiation creep process of both the cw and the rc material. The transient strain component γ t recovers completely when the specimen is exposed to the irradiation after removal of the torque.

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