The effect of alloying and fast-neutron irradiation upon the behavior of interstitial impurities in vanadium and V-Ga and V-Ti-Cr alloys was studied using low-frequency internal friction. It was found that, before irradiation, oxygen and nitrogen impurities in plain vanadium and V-Ga alloys were in a solid solution, whereas, in V-Ti and V-Ti-Cr alloys, they were predominantly fixed to form chemical compounds. Unlike the irradiation of plain vanadium, the irradiation of V-Ga alloys at 673K to a neutron fluence of 4.24 x 1025/m2 (E > 0.1MeV) did not knock out oxygen and nitrogen impurities from interstitial positions in the lattice to the positions of radiation defects. In the V-5Ti-5Cr alloy, oxygen and nitrogen atoms were fixed before and after neutron irradiation according to these conditions. Effect of Alloying and Irradiation on the Behavior of Interstitial Impurities in Vanadium and V-Ga and V-Ti-Cr Alloys. I.V.Borovitskaya, L.I.Ivanov, M.I.Zakharova, A.I.Dedyurin, N.A.Artemov: Russian Metallurgy, 2008, 2008[3], 239-44

Figure 1

Diffusivity of Dy on the (320) Surface of W