Thermal Processing of ZR-1 %NB Tube in Oxygen- and Nitrogen Containing Gaseous Mediums
Journal Title: Український журнал із машинобудування і матеріалознавства - Year 2016, Vol 2, Issue 2
Abstract
Zirconium alloys have unique properties (physical, mechanical, radiation) is therefore are an essential structural material for nuclear energy. A feature of these alloys is high affinity to the interstitial elements (O, N). Saturation of oxygen and nitrogen occurs during the technological and exploitation heating. The dissolved interstitial elements greatly effect on the properties of finished products. The proposed results of experimental researches will expand the notions of patterns of relationship of the influence of elements interstitial on the properties of the zirconium alloy. The work presents results of the saturation of Zr-1 %Nb tubes after processing in oxygen- and nitrogen- containing gas environments. The distribution of micro-hardness and the size of the hardened layers in the section of the tube wall and the weight gain were determined. It is found that the oxidation of the Zr-1 %Nb alloy (Т = 650 °С, РО2 = 2.6·10-1 Pа, τ = 3…20 h) makes a greater weight gain than after nitriding (Т = 650 °С, τ = 5…20 h). The state of the surface of the inside and outside of Zr-1 %Nb tubes for fuel cladding depends of the processing time. The differences in saturation of outer and inner surfaces of the tube were registered. In particular, the hardness of internal surface of the tube is smaller relative to the outer surface after oxidation and nitriding processes. The results of study of the outer and inner surface of fuel cladding in contact with gaseous environment containing oxygen and nitrogen will be interesting for investigators of reactor materials.
Authors and Affiliations
Vasyl Trush, Alexander Luk’yanenko, Viktor Fedirko
Keywords
Related Articles
- EP ID EP183425
- DOI -
- Views 116
- Downloads 0
Evaluation of Dynamic Characteristics of DPKr-2 Diesel Train on Straight Sections of Railway Track
The increase in motion speed of the trains moving along certain routs changes the operational conditions and interaction of the rolling stock and the track, and requires the solution of important issues related to the sp...
The Phase Difference between Components of Elliptical Oscillations of Vibratory Conveyor Providing Maximum Conveying Velocity
The piece goods conveying by the vibratory conveyor with elliptical oscillations is considered. Elliptical oscillations of the conveyor track are realized when conveyor has independent drives of oscillations in the direc...
Experimental Improvement of the Technology of Cutting of High-pressure Hoses with Metal Braid on Hand Cutting Machine
In the article the review of the problem of improvement of technology of high pressure hoses cutting on the hand cutting machines is analyzed. Different methods of cutting of high pressure hoses into the billets are over...
Structural and Kinematic Synthesis of the 1-DOF Eight-Bar Walking Mechanism with Revolute Kinematic Pairs
Problem statement. The use of existing and the most widespread drives (wheeled and caterpillar one) is sometimes limited by complicated operational conditions while moving on rough terrain. The mentioned drives require a...
Choose of optimal regimes of traffic light control in operating zone of pedestrian crossing
On the given stage of motorization level development and increase of traffic flow intensity, with increasing frequency apply to the implementation of intelligent automated systems of traffic control. The quality of their...