Zircaloy-4
Mechanism of Anodic Oxide Film Formation on Zircaloy-2, Zircaloy-4, Titanium and Niobium (Radio Tracer Technique)
... The kinetics of anodic oxidation of zircaloy-2, zircaloy-4, titanium and niobium have been studied in 0.1M sodium methoxide without and with addition of a millimole of sodium phosphate at a constant ...
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Mechanical Properties of Zircaloy 4 Cladding Tube by Advanced Expansion due to Compression (A EDC) Test
... tions, the inner fillers were replaced by metallic pellets, and the cladding tube size was reduced to optimize the stress- strain state for PCMI. The reduction of specimen volume also offered the benefit that the future ...
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Electrochemical Corrosion Study of Zircaloy-4 in a LiOH Solution at High Temperature and Pressure
... of Zircaloy-4 in simulated pressurized water reactor coolant at 350°C was studied via in situ potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) ...of Zircaloy-4 ...
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Effect of Current Density on the Anodic Behaviour of Zircaloy-4 and Niobium: A Comparitive Study
... of ionic current density on the field across the oxide film. Thickness of the anodic films were estimated from capacitance data. The formation rate, current efficiency and differential field were found to increase with ...
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Kinetic and Mechanistic Studies of Oxide Film Formation on Zircaloy- 4 in Lithium Hydroxide using Radio Tracer 32P
... The authors wish to thank Prof. Zubaida Azeem, Principal and Prof. Rafiq Mohiuddin, Head, Department of Chemistry, Osmania University College for Women for their keen interest and encouragement. The authors are also ...
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Experimental Investigation of Strain, Damage and Failure of Hydrided Zircaloy-4 with Various Hydride Orientations
... This experimental investigation is devoted to the influence of the orientation of hydrides on the mechanical response of Zircaloy-4. Ring tensile tests are performed on unirradiated CWSR ...
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Simulating Hydride Embrittlement on Cold-Worked Stress-Relieved Zircaloy-4 with Gurson-Tvergaard-Needleman Damage Model
... stress-relieved Zircaloy-4 is analyzed using a Gurson-Tvergaard-Needleman (GTN) damage ...hydrided Zircaloy-4 is adapted to the cold-worked stress-relieved ...stress-relieved ...
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Effect of weld parameters on porosity formation in electron beam welded Zircaloy 4 joints : X ray tomography study
... to Zircaloy-4 (Zr-4) similar butt joints were prepared using Electron Beam Welding (EBW) technique under different weld conditions such as with beam oscillation, without beam oscillation and at ...
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The PROMETRA Program: A Reliable Material Database for Highly Irradiated Zircaloy-4, ZIRLO(TM) and M5(TM) Fuel Claddings
... The assessment of the mechanical properties of the highly irradiated fuel claddings during an RIA (Reactivity Initiated Accident) has been carried out in the framework of the PROMETRA programme. Three main types of tests ...
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A Model to Describe the Anisotropic Viscoplastic Mechanical Behavior of Fresh and Irradiated Zircaloy-4 Fuel Claddings under RIA Loading Conditions
... 3, 4, 5] as polycrystalline [ 6, 7, 8], have been proposed in the literature to simulate the mechanical behavior of zirconium alloys cladding ...(CWSR) Zircaloy-4 fuel claddings under RIA loading ...
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Thermal isocreep curves obtained during multi-axial creep tests on recrystallized Zircaloy-4 and M5<sup>TM</sup> alloy
... Zirconium alloys are widely used in the nuclear industry. Several components, such as cladding or guide tubes, undergo strong mechanical loading during and after their use inside the pressurized water reactors. The ...
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Formation of self organized Zircaloy 4 oxide nanotubes in organic viscous electrolyte via anodization
... and Zircaloy-4) are important alloys that are widely used as cladding materials for fuel rods in the light water nuclear reactors due to their low-neutron absorption cross section, high corro- sion ...
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Effect of conditions on the anodization of Zircaloy 4 in EDTA
... Anodization of Zircaloy-4 in EDTA electrolyte has been studied under different anodizing conditions at room temperature. It has been observed that the change of current density and solvent has a marked ...
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Short-Term Rupture Studies of Zircaloy-4 and Nb-Modified Zircaloy-4 Tubing using Closed-End Internal Pressurization
... per Zircaloy-4 cladding, these results could be described using a Sinh-function ...(Eqs. 4 and 5). Biaxial creep results on Zircaloy-4 tubing by Tanikella[26] revealed transitions ...
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Hydrogen Pick up in Zircaloy 4: Effects in the Dimensional Stability of Structural Components under Nuclear Reactor Operating Conditions
... In the present work, the expansion coefficient due to hydrogen incorporation was measured for the axial di- rection of a Zircaloy-4 cooling channel, similar to that installed in the Atucha I PHWR, ...
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Study of Oxidation Kinetics in Air of Zircaloy 4 by in Situ X Ray Diffraction
... The formation of monoclinic and tetragonal zirconia leads to the increase in hardness and the reduction in thermal conductivity which leads to the degradation of zircaloy-4 mechanical and thermal ...
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Creep-Rupture Study of Annealed Zircaloy 4: Stress and Temperature Effects
... It has been established that in zirconium single crystals, prism slip is activated by a stress applied in the a-direction of the unit cell [4-6]. In tests performed below 400°C with stress applied along the ...
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Prediction of Failure of Highly Irradiated Zircaloy Clad Tubes under Reactivity Initiated Accidents (C037)
... Firstly, we note that the as-fabricated wall thickness of commercial clad tubes typically deviates by ± 2 to 3% from its nominal value around the perimeter of a given cross section, and that it is therefore motivated to ...
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Computational Non-Smooth Fracture Dynamics in Nonlinear and Heterogeneous Materials. Application to Fracture of Hydrided Zircaloy
... Figure 3 shows the weakening effect of the hydrides. The introduction of 30 % volume fraction of hydrides reduces the total elongation (TE) by a factor of 5 (TE for Zircaloy-4 ' 24 %, TE for hydrided ...
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Electrolytic Recovery of High Purity Zr from Radioactively Contaminated Zr Alloys in Chloride Salts
... of Zircaloy cladding because electrochemical methods are more simple and compact than ...(Zr 4+ and Zr 2+ ) and insoluble states (Zr metal ZrCl) in molten ...unirradiated Zircaloy-4 piece in ...
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