Void closure during open die forging of large size martensitic stainless-steel ingots: an experimental-analytical-numerical study

Geisler, Antoine; Sadeghifar, Morteza; Morin, Jean-Benoı̂t; Loucif, Abdelhalim; Jahazi, Mohammad

doi:10.1007/s12289-022-01735-y

Cited by 3 publications

(2 citation statements)

References 30 publications

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“…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: 97%

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: Introductionmentioning

confidence: 97%

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

et al. 2023

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“…An unquestionable advantage of using the elongation operation in the processes of shaping products is the possibility of closing internal metallurgical discontinuities arising at the stage of production of the input material [19][20][21][22][23][24][25][26][27]. Various methods of closing internal metallurgical discontinuities in the cross-section of forgings were studied and the results can be found in the works of [26][27][28][29][30], where it was shown that the closure of metallurgical discontinuities in deformed bars is affected by the main parameters of the forging process, such as draft, relative feed, feedstock temperature, and the shape and dimensions of the dies.…”

Section: Introductionmentioning

confidence: 99%

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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Study on interfacial microstructure and shear strength of hot-compression bonded Ti386/TC4

Liu,

Yuan,

Liu

et al. 2024

J Mater Sci

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Void closure during open die forging of large size martensitic stainless-steel ingots: an experimental-analytical-numerical study

Cited by 3 publications

References 30 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

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

Study on interfacial microstructure and shear strength of hot-compression bonded Ti386/TC4

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