The influence of nitrogen, oxygen and helium on the temperature range of deuterium retention in 18Cr10NiTi stainless steel (of AISI304L type) was investigated. It was demonstrated that the introduction of oxygen, nitrogen or helium into 18Cr10NiTi steel extends the upper limit in the high-temperature range of deuterium retention. It was found that for 18Cr10NiTi stainless steel, pre-irradiated with helium ions, the increase in the temperature range of deuterium retention occurs in steps: on attainment of helium concentration of about 0.5at%He the temperature range increases by some 100K, and on attainment of helium concentration of about 2.5at%He the temperature range increases by some 350K. The introduction of oxygen into 18Cr10NiTi stainless steel results in the increase of the temperature range of deuterium retention in the direction of rise in temperature. In the deuterium thermodesorption spectrum, this manifests itself by the occurrence of an additional low-amplitude peak with the maximum temperature Tm ~ 560K. The introduction of nitric impurity into 18Cr10NiTi stainless steel results in the extension of the temperature range of deuterium retention towards higher temperatures.

The Influence of Interstitial Impurities on Temperature Ranges of Deuterium Retention in Austenitic Stainless Steel 18Cr10NiTi. I.M.Neklyudov, O.M.Morozov, V.G.Kulish, V.I.Zhurba, A.G.Galytsky, E.V.Piatenko: Journal of Nuclear Materials, 2009, 386-388, 658-60