Investigation of the Influence of Hot Forging Parameters on the Closing Conditions of Internal Metallurgical Defects in Zirconium Alloy Ingots

Banaszek, G.; Ozhmegov, Kirill; Kawałek, A.; Sawicki, S.; Magzhanov, Medet; Arbuz, Alexandr

doi:10.3390/ma16041427

Cited by 5 publications

(16 citation statements)

References 13 publications

(14 reference statements)

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“…Specimens of the M5 alloy in a crystallized state (Figure 3), each of a working portion with a diameter of 10 mm and a height of 12 mm, were used for the tests. The tests were carried out in the temperature range of 770-950 °C [2,16]. On the basis of the Zr-Nb phase equilibrium scheme at the 870-950 °C temperature range, the structure of the metal is characterized by grains in the shape of the A2 unit cell.…”

Section: Methodology Of Experimental Researchmentioning

confidence: 99%

“…Tests were carried out for the deformation speed range from 0.5 s −1 to 5.0 s −1 , even though the average deformation speed for the hot elongation of the Zr alloys rods on the pressure is 0.5 s −1 [16]. However, in local places of the deformed rods in the shaped tools, the deformation speed is slightly higher, which is why it was decided to expand the research area.…”

Section: Methodology Of Experimental Researchmentioning

confidence: 99%

“…The parameters for the lengthening operation were adopted based on the authors' experience in this field [15,16].…”

Section: Methodology Of Conducted Numerical Researchmentioning

confidence: 99%

“…An analysis of the literature shows that methods for closing foundry voids during hot elongation of steel bars and aluminum and magnesium alloys are known [8][9][10][11][12][13][14][15], while no workswere found on closing foundry voids in the elongation operation of zirconium bars with the exception of the authors' work [16].…”

Section: Introductionmentioning

confidence: 94%

“…These figures show increases in the temperature of test T from 770 °C to 950 °C, during which the value of the plasticizing stress σp decreases about 2.5 times. An increase in the deformation speed from The tests were carried out in the temperature range of 770-950 • C [2,16]. On the basis of the Zr-Nb phase equilibrium scheme at the 870-950 • C temperature range, the structure of the metal is characterized by grains in the shape of the A2 unit cell.…”

Section:   mentioning

confidence: 99%

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Modeling of Closure of Metallurgical Discontinuities in the Process of Forging Zirconium Alloy

et al. 2023

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This article presents the results of testing the conditions of closing foundry voids during the hot forging operation of an ingot made of zirconium with 1% Nb alloy and use of physical and numerical modeling, continuing research presented in a previous thematically related article published in the journal Materials. The study of the impact of forging operation parameters on the rheology of zirconium with 1% Nb alloy was carried out on a Gleeble 3800 device. Using the commercial FORGE®NxT 2.1 program, a numerical analysis was performed of the influence of thermo-mechanical parameters of the hot elongation operation in trapezoidal flat and rhombic trapezoidal anvils on the closure of foundry voids. The analysis of the obtained test results was used to formulate recommendations on the technology of hot forging and the anvilgeometry, ensuring closure of foundry voids. Based on their research, the authors conclude that the shape of the deformation basin and the value and hydrostatic pressure have the greatest influences on the closure of foundry voids.

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Section: Methodology Of Experimental Researchmentioning

confidence: 99%

Section: Methodology Of Experimental Researchmentioning

confidence: 99%

“…The parameters for the lengthening operation were adopted based on the authors' experience in this field [15,16].…”

Section: Methodology Of Conducted Numerical Researchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

Section:   mentioning

confidence: 99%

See 3 more Smart Citations

Modeling of Closure of Metallurgical Discontinuities in the Process of Forging Zirconium Alloy

et al. 2023

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Modeling of Closure of Metallurgical Discontinuities in the Process of Forging Zirconium Alloy

Banaszek¹,

Ozhmegov²,

Kawałek³

et al. 2023

Preprint

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The article presents the results of testing the conditions of closing foundry voids during the hot forging operation of an ingot made of zirconium with 1% Nb alloy and use of the physical and numerical modelling, which is a continuation of research presented in a previous thematically related article published in the journal Materials. The study of the impact of forging operation parameters on the rheology zirconium with 1% Nb alloy was carried out on the Gleeble 3800 device. Using the commercial FORGE®NxT 2.1 program, a numerical analysis of the influence of thermo-mechanical parameters of the hot elongation operation in trapezoidal flat and rhombic trapezoidal anvils on the closure offoundry voids was performed. The analysis of the obtained test results was used to formulate recommendations on the technology of hot forging and the geometry of anvils, which ensure the closure foundry voids during the operation of hot forging

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Analysis of the Effect of the Elongation Operation on the Welding of Internal Metallurgical Discontinuities

Banaszek,

Bajor,

Kawałek

et al. 2023

Materials

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This article discusses the results of our research into the effect of elongation on the welding of internal metallurgical discontinuities for two different geometrical shapes of a model feedstock of a selected magnesium alloy. Model discontinuities, specifically those of the metallurgical void type, were placed in various local zones of the modelled feedstock to check the influence of their location on their welding. The numerical modelling was carried out using the Forge®NxT2.1 application based on the finite element method. The results of the numerical tests were verified in laboratory conditions using the Gleeble simulator of metallurgical processes. Based on this research, it was found that the geometric shape of the feedstock material and the location of internal metallurgical discontinuities have a significant impact on the welding of discontinuities. The optimal values of the main process parameters of the elongation operation in flat dies were also determined for use in individual forging stages in order to eliminate internal metallurgical discontinuities. On the basis of the numerical studies carried out and their verification under laboratory conditions, it was concluded that a relative draft equal to 35% should be applied to weld the metallurgical discontinuities, which would result in a favorable hydrostatic pressure distribution within the discontinuities.

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Investigation of the Influence of Hot Forging Parameters on the Closing Conditions of Internal Metallurgical Defects in Zirconium Alloy Ingots

Cited by 5 publications

References 13 publications

Modeling of Closure of Metallurgical Discontinuities in the Process of Forging Zirconium Alloy

Modeling of Closure of Metallurgical Discontinuities in the Process of Forging Zirconium Alloy

Modeling of Closure of Metallurgical Discontinuities in the Process of Forging Zirconium Alloy

Analysis of the Effect of the Elongation Operation on the Welding of Internal Metallurgical Discontinuities

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