Arc welding of zirconium and its alloys: A review

Slobodyan, Mikhail

doi:10.1016/j.pnucene.2021.103630

Cited by 26 publications

(5 citation statements)

References 195 publications

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“…(3) Coarse grains and fine acicular α′ phases increase the strength of the joint, but reduce the plasticity of the joint. The tensile strengths of the joints at RT and 375 °C were 438 The WZ and HAZ of zirconium have a worse corrosion resistance than the BM in most cases [8]. EBW is carried out in a vacuum environment without the addition of filler metal, which effectively controls the gas contamination from the environment and the variation of weld composition caused by the welding material.…”

Section: Discussionmentioning

confidence: 99%

“…The thickness of the corrosion layer at the BM and WZ varied from 9 to 12 µm and 12 to 15 µm, respectively. The WZ and HAZ of zirconium have a worse corrosion resistance than the BM in most cases [8]. EBW is carried out in a vacuum environment without the addition of filler metal, which effectively controls the gas contamination from the environment and the variation of weld composition caused by the welding material.…”

Section: Corrosion Resistancementioning

confidence: 99%

“…Welding technology of zirconium alloy is of great significance to improve the manufacturing quality and productivity of zirconium alloy fuel assemblies [ 8 , 9 ]. Zirconium is a chemically active metal, and its welded joints are susceptible to contamination by airborne gases such as oxygen, nitrogen and hydrogen, as well as grain coarsening and the deterioration of joint properties due to the low thermal conductivity of the weld molten pool heat accumulation [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…When zirconium alloys are welded by gas-shielded arc welding, measures such as the addition of trailing shields and backing shields, i.e., the extension of the shielding gas supply, are required to avoid joint contamination [ 8 , 10 , 11 , 12 ]. The N and O in the atmosphere will inevitably enter the weld during TIG welding of Zr-4 alloys, resulting in a significantly higher weld hardness than the base metal (BM) [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Study of Microstructure and Performance Evaluation of Zr-Sn-Nb Joints by Electron Beam Welding

Zhao,

Zhang,

Yue

et al. 2024

Materials

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In this work, Zr-Sn-Nb alloy was joined by electron beam welding (EBW). A defect-free Zr-Sn-Nb joint with sound appearance was obtained. The grains in the weld zone (WZ) and heat-affected zone (HAZ) are significantly coarsened. The columnar grains with a maximum grain size of 0.5 mm are distributed in the upper region of the WZ, while the equiaxed grains are almost located in the bottom region of the WZ. The WZ is mainly composed of the dominant α-Zr, α′-Zr and a few β phases. The grain orientation of WZ and HAZ is uniform, indicating that no obvious preferred orientation existed. Coarse grains and fine acicular α′ phases increase the strength of the joint, but reduce the plasticity and toughness of the joint. The tensile strengths of the joints at room temperature (RT) and 375 °C were 438 MPa and 313 MPa, respectively. The RT impact energy of the joint is 18.5 J, which is only 58.3% of the BM. The high purity of the EBW process and unsignificant grain orientation minimizes damage to the corrosion resistance of Zr-Sn-Nb alloy joints. The corrosion weight gain of the joint specimen and the BM specimen were 12.91 mg/dm2 and 12.64 mg/dm2, respectively, and the thicknesses of the cross-section corrosion layer were 12–15 μm and 9–12 μm, respectively.

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Section: Discussionmentioning

confidence: 99%

Section: Corrosion Resistancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study of Microstructure and Performance Evaluation of Zr-Sn-Nb Joints by Electron Beam Welding

Zhao,

Zhang,

Yue

et al. 2024

Materials

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“…1 Due to the unique physicochemical properties of Zr and its compounds, it finds an extensive application in the field of science and technology. This metal is an ideal choice to use as a structural material in various industries such as chemical, metallurgical, glass, and ceramics 2,3 due to its excellent heat and chemical resistance properties. Generally, it is considered as a non-toxic metal and the human body contains about 300 mg of Zr.…”

Section: Introductionmentioning

confidence: 99%

Method to Eliminate Fluoride Interference in the Spectrophotometric Estimation of Zirconium: Application to U–Zr Alloys

2022

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In the estimation of Zr by UV-visible spectrophotometric technique, fluoride interference is a decade old unsolved problem. The process of repeated fuming with strong acids is often used to remove fluoride from the solution in order to estimate Zr by spectrophotometry analysis. For the first time, in this work, a simple use of AlCl3 is reported as a suppressing reagent to eliminate the interference of fluoride in the estimation of Zr. Xylenol orange in HCl medium is used as a complexing reagent. Linearity in the datum acquired from absorbance at 551 nm (λmax) is achieved over the concentration range 0.25-4.5 µg mL-1 of Zr with a molar absorptivity of 35030 L.mol-1.cm-1 and Sandell’s sensitivity of 0.003 µg.cm-2. Zr is quantified in the variety of U-Zr alloys and various water samples by using spectrophotometric detection with a classical univariate calibration with suppressing of fluoride-interference through AlCl3. Results from this novel analytical method herein developed for the first time are compared with those achieved from gravimetric analysis.

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