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Information × Registration Number 0216U000786, 0115U004011 , R & D reports Title Improving resource of products from zirconium alloys using gradient solid soluble strengthening subsurface layers of metal popup.stage_title Head Lukyanenko Alexander, Кандидат технічних наук Registration Date 03-03-2016 Organization Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine popup.description2 The kinetics of oxidation in air samples at a temperature of 550 ° C up to 100 hours after thermo-chemical treatment for different modes of oxygen in the atmosphere, and after nitriding. Realized metallographic, durametric and fractography study these samples. Developed and tested method of cyclic tensile test specimens made from fuel element tubes (rings with hubs). Determined fatigue durability of samples in the state of delivery. Done chemical and thermal processing circuit samples with concentrators in oxygen gas atmosphere with different oxygen content were treated. Studied fatigue durability cyclic tensile specimens (rings with stress concentrator) made of fuel element tubes after thermo-chemical treatment in the rarefied oxygen gas environment for different modes. According to research was selected the optimal regimes thermo-chemical treatment of fuel element tubes. Methods thermo-chemical processing of zirconium alloy products Zr 1 Nb in controlled oxygen- and nitrogen-containing environments that can increase the hardness of the surface layer (thickness 15-40 microns) to 1.5 times, improve fatigue durability of zirconium products to about 30%; increase the tensile strength and yield strength of the alloy limit without a noticeable decrease in ductility; reduce the rate of oxidation products; prevent hydrogenation of the alloy during operation in order to prevent delayed hydrogen cracking shells fuel element tubes. Product Description popup.authors Проскурняк Роман Васильович Труш Василь Степанович popup.nrat_date 2020-04-02 Close