Registration Number
0216U002428,
0113U007546
, R & D reports
Title
Engineering of valuation methods of working capacity of products from zirconic alloys in the conditions of corrosion and hydrogen-stress cracking
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Head
Stoev Petr Illich,
Registration Date
04-03-2016
Organization
National Science Center "Kharkiv Institute of Physics and Technology
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The object of study: thin-walled reactor construction products made of zirconium alloy Zr1%Nb. Objective: To develop a set of methods for determination of strength, plastic, fracture toughness, fatigue and acoustic emission characteristics of the alloy fuel tubes Zr1%Nb and effective method of modifying the surface to improve the performance of products from zirconium alloys in terms of the corrosion and hydrogen cracking. Methods: determination of mechanical properties, microstructure research, the study of acoustic emission during deformation products. It is shown that further trouble-free operation of units and products from zirconium alloys in nuclear reactors, and increasing their science-based resources requires the creation of an integrated method for assessing the physical and mechanical characteristics of the metal structures and the determination of their limit state. An experimental complex method that includes: methods for determining the mechanical properties, methods of establishing the characteristics of crack resistance and measuring the hardness, structural methods of investigation and determination of the parameters of acoustic emission during deformation products. Defined mechanical properties and acoustic characteristics of the alloy tensile specimens Zr1%Nb, made from fuel tubes after various chemical and thermal treatments and coating, air oxidation and hydrogenation. Founded modes thermochemical processing of zirconium products in a controlled oxygen and nitrogen-containing environments that have improved fatigue resistance of zirconium products by 40%, increase the tensile strength and yield strength of the alloy without a noticeable decrease in ductility, reduce the rate of oxidation products and to prevent hydrogen absorption alloy during operation avoid delayed hydrogen cracking claddings.
Product Description
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Єфімов О.А..
Андрієвська Н.Ф.
В'югов П.М.
Великодний О.М.
Дегтярьов Г.М.
Мазін О.І.
Панов В.А.
Стоєв Петро Ілліч
Тихоновський М.А.
Турчін О.А.
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2020-04-02
