Abstract
The influence of recrystallization on the recovery of radiation damage in tungsten (W) was investigated. Polycrystalline cold-rolled W foils were annealed in the temperature range between 1100 and 1600 °C and recrystallization and grain growth was observed. Subsequently, the specimens were irradiated with 7 MeV protons at cryogenic temperature. The induced radiation damage and its recovery during isochronal annealing treatments was monitored by in-situ measurements of the electrical resistivity. We observe that the recrystallized samples exhibit (a) a significant reduction in total defect recovery and (b) changes in characteristic features of the recovery spectra with respect to the as-received ones. These results are discussed and correlated to the effect of grain boundaries and dislocations on the radiation defect reactions.
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