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Information × Registration Number 0218U000469, 0117U000721 , R & D reports Title Development of physicochemical fundamentals of surface engineering zirconium alloys in controlled gas environments and of methods of resource evaluation of elements of active zone popup.stage_title Head Fedirko Victor, Registration Date 14-02-2018 Organization Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine popup.description2 The influence of final heat treatment of fuel element tubes in different gas environments on short-term and long-term durability at operating temperature (380°С) was investigated. The thermochemical treatment in the nitrogen-containing medium increases the short-term strength of rings-samples by ~ 30 MPa for air tests at the temperature of 380°C. Treatment in oxygen-containing media somewhat reduces (~ 15 MPa) the short-term strength of the rings-samples. The highest longitudinal strength on the basis of 100 hr showed rings-samples after thermochemical treatment in nitrogen. Thermochemical treatment in oxygen-containing environments provides long-term durability at the level of standard heat treatment of fuel element tubes made of zirconium alloy Zr1% Nb. The microstructural differences in the nature of the destruction of samples of rings from zirconium alloy Zr1% Nb depending on the medium of the heat treatment are shown. Product Description popup.authors Лук'яненко Олександр Геннадійович Труш Василь Степанович popup.nrat_date 2020-04-02 Close