Co-deformation and dynamic annealing effects on the texture development during alpha–beta processing of a model Zr-Nb alloy

Daniel, Christopher S.; Garner, Alistair; Honniball, Peter D.; Bradley, Luke; Preuss, Michael; Prangnell, P.B.; Fonseca, João Quinta da

doi:10.1016/j.actamat.2020.116538

Cited by 14 publications

(4 citation statements)

References 66 publications

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“…The four alloys were respectively named Zr-30Nb, Zr-30Nb-0.8Y, Zr-30Nb-1.6Y, and Zr-30Nb-2.4Y according to the difference in Y content. With the increase in Y content, the density of the alloys decreases from 7.14 g/cm 3 to 6.89 g/cm 3 , and the porosity of the alloys increases from 0.05% to 0.86%.…”

Section: Methodsmentioning

confidence: 97%

“…Zirconium alloys, widely known as "the first metal in the atomic-energy age" were used in nuclear reactors as key structural components because of their small thermal neutron capture cross section, excellent corrosion resistance, and high-temperature mechanical properties [1][2][3]. In addition, due to their acceptable mechanical strength, good biocompatibility and superior corrosion resistance, zirconium and its alloys have become candidates for surgical implants [4].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Y doping on tensile plasticity of Zr-30Nb alloy via powder metallurgy

Xie,

Liu,

Liu

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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Zirconium alloys are widely used in the field of nuclear, chemical, aerospace, and medical industries due to their extremely low thermal neutron absorption, excellent corrosion resistance, radiation damage resistance, good mechanical properties, and biocompatibility, etc. Zr-based alloys prepared by powder metallurgy have the advantages of less macroscopic defects and a low cost. However, Zr-based alloys usually absorb oxygen with a high content during the preparation of the powder metallurgy, leading to poor tensile plasticity, which was the main reason for the limitation of the application of Zr alloys. In this study, the tensile plasticity of Zr-based alloys prepared by powder metallurgy was improved by doping yttrium hydrides due to the absorption of the yttrium to the oxygen in the alloy matrix. The effects of Y doped content on the microstructure and mechanical properties of Zr-30Nb alloys were carefully investigated. The results showed that the O content in the matrix was significantly decreased with the increase in doping Y, in which Y2O3 formed in the matrix. Because O is a stabilizing element of α phase, the decrease of O content in the alloy matrix leads to the decrease of α phase and the increase of β phase, which is beneficial to the improvement of tensile plasticity. Taking the Zr-30Nb alloy with the addition of 2.4 wt.% Y as an example, the tensile plasticity was increased by 4 times. The critical fracture strain was increased from 0.7 % to 3.5 % with 2.4 wt.% Y doping.

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Section: Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Effect of Y doping on tensile plasticity of Zr-30Nb alloy via powder metallurgy

Xie,

Liu,

Liu

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

View full text Add to dashboard Cite

show abstract

“…Zirconium and its alloys are extensively used in the nuclear industry, chemical industry, aerospace, and biomedical fields because of their comprehensive properties, such as small thermal neutron absorption cross-section, high radiation resistance, excellent corrosion resistance, and mechanical properties [1][2][3]. To enhance the high-temperature performance of Zr alloys for complex application environments, refractory elements with high melting points are often added to Zr alloys [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Interdiffusion in Zr-Mo/W Intermetallics

Wang

Liu

et al. 2023

Applied Sciences

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Intermetallic compounds or solid solutions can form between Zr and Mo/W, in which the multiphase of the diffusion may be influenced by each other. Interdiffusion kinetic data in such intermetallic systems are highly demanded for material design. In this work, solid–solid diffusion couples of Zr-Mo and Zr-W were prepared by the fixture method, and the interdiffusion behaviors of Zr-Mo and Zr-W at 1300–1500 °C were systematically investigated. The results showed that the intermetallic compounds Mo2Zr/W2Zr formed in the Zr-Mo/W diffusion systems. The growth constants of the Mo2Zr and W2Zr phases varied with temperature in accordance with the Arrhenius relationship, and the activation energies of growth were 109 kJ/mol and 285 kJ/mol, respectively. In addition, (Zr, Mo) solid solution formed between Mo2Zr and pure Zr as diffusion proceeded, resulting in a lower chemical potential for the formation of Mo2Zr. The den Broeder method was used in calculating the interdiffusion coefficients of the solid solution. The results showed that the interdiffusion coefficient in the (Zr, Mo) solid solution decreased with the increase of Mo concentration. Moreover, the diffusion activation energy of the solid solution was evaluated based on the Arrhenius relationship, and the activation energy was 145–170 kJ/mol when the Mo content was in the range of 2–10 at. %. These diffusion kinetic data provide a reference for the composition design and preparation technic of Zr-based alloys.

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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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Co-deformation and dynamic annealing effects on the texture development during alpha–beta processing of a model Zr-Nb alloy

Cited by 14 publications

References 66 publications

Effect of Y doping on tensile plasticity of Zr-30Nb alloy via powder metallurgy

Effect of Y doping on tensile plasticity of Zr-30Nb alloy via powder metallurgy

Interdiffusion in Zr-Mo/W Intermetallics

Autowave Criteria of Fracture and Plastic Strain Localization of Zirconium Alloys

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