Abstract
Irradiation creep data have been obtained with an apparatus designed to measure the irradiation creep of material subjected to light ion bombardment. The experimental apparatus has the capability to remotely set and control ion flux, stress and temperature for the creep test. Creep data have been obtained from nickel, 152 μm thick, bombarded with 17 MeV D + ions at 473 K. It is shown that this choice of ion energy and specimen thickness results in minimal error induced by the stress gradient effect. Results to date indicate a nonlinear stress dependence of the creep rate with a stress exponent ≈2.5. This result is in substantial agreement with that found by other investigators using light ion irradiations. Results also suggest that in the temperature and stress range being studied, a climb-glide creep mechanism is operative.
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