Evolution of β phase and mechanical mechanisms in an α-type Zr alloy processed by rolling at different temperatures

Feng, Zhihao; Li, D.; Dong, Huicong; Li, J.H.; Su, Ru-Keng; Wu, Dayong; Chen, Y.Q.; Zhang, X.Y.; Liu, R.P.

doi:10.1016/j.matchar.2021.110873

Cited by 9 publications

(2 citation statements)

References 46 publications

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“…The fine-grain strengthening effect caused enhancement of the mechanical properties of the alloy by introducing a large number of grain boundary defects, which impeded the movement of dislocations. In addition, in contrast to the second-phase strengthening effect, fine-grain strengthening usually resulted in a better strength-to-plastic ratio [34]. During the tensile property tests, we also found that the α + β duplex alloys with less α-phase content usually exhibited poor mechanical properties.…”

Section: Tensile Performance Analysismentioning

confidence: 67%

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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Section: Tensile Performance Analysismentioning

confidence: 67%

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

et al. 2022

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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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Comparative Study on Tribological Behaviors of Two TiZr-Based Alloys in Vacuum

Zhong

Wang

et al. 2021

J. of Materi Eng and Perform

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Evolution of β phase and mechanical mechanisms in an α-type Zr alloy processed by rolling at different temperatures

Cited by 9 publications

References 46 publications

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

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

Comparative Study on Tribological Behaviors of Two TiZr-Based Alloys in Vacuum

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