Comparison on the microstructure, aqueous corrosion behavior and hydrogen uptake of a new Zr-Sn-Nb alloy prepared by different hot rolling temperature

Wei, Tianguo; Dai, Xianying; Long, Chongsheng; Sun, Chao; Long, Shaojun; Zheng, Jiyun; Wang, Pengfei; Jia, Y.Z.; Zhang, Junsong

doi:10.1016/j.corsci.2021.109808

Cited by 11 publications

(4 citation statements)

References 43 publications

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“…Zircaloy-4 exclusively presents a unique type of second phase known as Zr(Fe,Cr) 2 [ 34 ]; thus, prior to oxidation, these phases SPP1 and SPP2 corresponded to Zr(Fe,Cr) 2 . Microcracks were observed around the SPP1 and SPP2 because the second phases near the cracks are more easily oxidized and on the contrary, the second phases subsequently promote crack formation [ 35 ]. In addition, during corrosion, Fe diffuses out of the Zr(Fe,Cr) 2 and is oxidized, which is consistent with previous research [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

Effects of Hydrogenation on the Corrosion Behavior of Zircaloy-4

Yue,

Zhou,

Zhao

et al. 2024

Materials

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Hydrogen plays an important role in the corrosion of zirconium alloys, and the degree of influence highly depends on the alloy composition and conditions. In this work, the effects of hydrogenation on the corrosion behavior of Zircaloy-4 in water containing 3.5 ppm Li + 1000 ppm B at 360 °C/18.6 MPa were investigated. The results revealed that hydrogenation can shorten the corrosion transition time and increase the corrosion rates of Zircaloy-4. The higher corrosion rates can be ascribed to the larger stress in the oxide film of hydrogenated samples, which can accelerate the evolution of the microstructure of the oxide film. In addition, we also found that hydrogenation has little effect on the t-ZrO2 content in the oxide film and there is no direct correspondence between the t-ZrO2 content and the corrosion resistance of the Zircaloy-4.

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Section: Resultsmentioning

confidence: 99%

Effects of Hydrogenation on the Corrosion Behavior of Zircaloy-4

Yue,

Zhou,

Zhao

et al. 2024

Materials

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“…The alloy can be rolled and deformed, which leads to an increase in the density of defects within the matrix and an elevated distortion of gold. As a result, the alloy exhibits mechanical instability [12][13][14]. Moreover, the β-phase volume fraction and grain size in the alloy increase with the annealing temperature, while the excessive grain size is not conducive to the overall mechanical properties of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Mechanical Properties for a Novel Zr–Ti–V Alloy via Hot-Rolling and Annealing Treatment

et al. 2022

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In this experiment, an annealing treatment was carried out for a rolled Zr–Ti–8V alloy, and the toughening mechanism of the material was thoroughly analyzed by combining advanced material characterization and other testing methods. The phase composition of the Zr–Ti–8V alloy was sensitive to the applied annealing temperature, while a series of changes in the phase composition of the alloy were induced by enforcing bigger thermal budgets. Implementing a temperature value of 450 °C led to a higher α-phase content, in striking contrast with the case where a lower annealing temperature of 400 °C was applied. The β grains that were stretched in the alloy’s rolling direction and annealed at 600 °C to 800 °C were recrystallized. As a result, the acquired configuration was equiaxed with β grains. The extracted results revealed that the alloy annealed at 450 °C showed a good strong–plastic ratio, with tensile strength and elongation of 1040 MPa and 8.2%, respectively. In addition, the alloy annealed at 700–800 °C showed good plasticity properties. From the hardness tests and friction wear experiments on all the experimental alloys, it was demonstrated that the dual-phase alloy with α + β had higher hardness and wear resistance, whereas the opposite trend was observed for the single β-phase alloy.

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“…Despite the continuing interest in Zr-based alloys [10][11][12][13][14][15], the nature of their plastic deformation has not been fully studied. As for doped Zr alloys, their deformation and plastic characteristics are mainly determined by the complex phase composition and microstructure [16][17][18][19][20][21][22]. To gain insight into the plastic flow features of zirconium alloys, the evolution of their micro-and macroscopic defective structures with the development of strain requires thorough study.…”

Section: Introductionmentioning

confidence: 99%

Autowave Criteria of Fracture and Plastic Strain Localization of Zirconium Alloys

Зуев

Баранникова

Орлова

2022

Metals

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Plastic deformation and fracture of Zr–1% Nb alloys exposed to quasi-static tensile testing have been studied via a joint analysis of stress-strain curves, ultrasound velocity and double-exposure speckle photographs. The possibilities of ductility evaluation through the εxx strain distribution in thin-walled parts of zirconium alloys are shown in this paper. The stress-strain state of zirconium alloys in a cold rolling site is investigated considering the development of localized deformation bands and changes in ultrasound velocity. It is established that the transition from the upsetting to the reduction region is accompanied by the significant exhaustion of the plasticity margin of the material; therefore, the latter is more prone to fracture in this zone exactly. It is shown that traditional methods estimating the plasticity margin from the mechanical properties cannot reveal this region, requiring a comprehensive study of macroscopically localized plastic strain in combination with acoustic measurements. In particular, the multi-pass cold rolling of Zr alloys includes various localized deformation processes that can result in the formation of localized plasticity autowaves. Recommendations for strain distribution division over the deformation zone length in the alloy in the pilger roll grooves are provided as well.

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Comparison on the microstructure, aqueous corrosion behavior and hydrogen uptake of a new Zr-Sn-Nb alloy prepared by different hot rolling temperature

Cited by 11 publications

References 43 publications

Effects of Hydrogenation on the Corrosion Behavior of Zircaloy-4

Effects of Hydrogenation on the Corrosion Behavior of Zircaloy-4

Improvement of Mechanical Properties for a Novel Zr–Ti–V Alloy via Hot-Rolling and Annealing Treatment

Autowave Criteria of Fracture and Plastic Strain Localization of Zirconium Alloys

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