Development and validation of a finite-element model for isothermal forging of a nickel-base superalloy

Chamanfar, A.; Valberg, Henry; Templin, B.; Misiolek, W. Z.

doi:10.1016/j.mtla.2019.100319

Cited by 21 publications

(8 citation statements)

References 26 publications

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“…The data were seen at the speci c area of the forming. The inhomogeneous deformation happened in the death metal area next to the dies [3]. The FEM outcomes determined that both data in uence the stress of the die and the principal stress of the novel form near the fracture region decreases due to pre-compression stress of the zone.…”

Section: Introductionmentioning

confidence: 96%

A Controlled Material Flow Forming Mechanism of Curve Cutter Forging in The Hot Impression Forging of The Medical Instrument

Fuh¹,

Chen²,

Wu³

et al. 2021

Preprint

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In this study, a forming process during producing medical surgery curve cutter stapler would be tentatively as well as numerically investigated and validated by the simulations. The reasons for the investigation are to find the critical technology of the forming process and to understand this medical tool head forming within the forming process associated with medical surgery curve cutter stapler and improve the traditionally forming process. Moreover, to understand the medical tool head forming, the novel forging process, and the parting line approach are offered and simulated by the FE software QForm, the method data on the medical tool head forging are investigated and compared with the experimental analysis. According to the outcomes of the simulations, the distributions of the forming process, some parameters have been gotten to explain and improve these microscopic phenomena. The precision of the numerical patterns has been confirmed by comparing them with the test dimensions. The offered revised model from the forming preform has been submitted to achieve an alike forging condition when reducing manufacturing cost After the improved method, measure the shrinkage width of the workpiece. Compared with the product of the traditional process, the widest area is 6.37mm shrink to 6.29mm. The shrinkage is about 1%. Compared with the previous result is 5%, the improvement plan has been optimized the outcomes very much.

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Section: Introductionmentioning

confidence: 96%

A Controlled Material Flow Forming Mechanism of Curve Cutter Forging in The Hot Impression Forging of The Medical Instrument

Fuh¹,

Chen²,

Wu³

et al. 2021

Preprint

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“…Heat-resistant nickel-based superalloys belong to a unique class of materials capable of operating at elevated temperatures and in corrosion environment due to their complex chemical composition. Therefore, superalloys are widely used for the manufacture of various parts for aircraft gas turbine engines, as well as for rocket engines [1][2][3][4][5][6][7][8][9][10][11][12]. The complex chemical composition of modern superalloys provides the required characteristics of the heat-resistant property due to solid solution hardening and the precipitation of the strengthening coherent phases.…”

Section: Introductionmentioning

confidence: 99%

Computer and physical modeling of multiple isothermal forging of EK61 superalloy

et al. 2022

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Studies on the process of multiple isothermal forging of high-temperature nickel-based EK61 superalloy using computer simulation in the DEFORM-3D software package in a three-dimensional formulation and a comparison with experimental data were carried out. Based on the simulation results, it is shown that with each subsequent stage of forging, the maximum strain values become higher, and the strain differences in the central and peripheral regions become smaller. Such a strain distribution leads to the formation of a homogeneous ultrafine-grained (UFG) microstructure. The initial coarsegrained microstructure is gradually transformed into a fine-grained microduplex type microstructure at 0.77T melt and with a further decrease in the processing temperature to 0.73T melt , it is transformed into a submicroduplex type (γ + δ) UFG microstructure.

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“…Puchi-Cabrera et al [21] have successfully used the remeshing technique and EFG to model the axisymmetric compression test. Chamanfar et al [22] studied a nickel-base superalloy's isothermal upsetting. They used a commercial finite element code with remeshing, providing a complete analysis of the strain, strain rate, temperature, pressure, and dynamic recrystallization (DRX) during the test.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the hot compression test for bulk metal forming application

et al. 2022

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In this study, a comparison between the well-established Lagrangian approach and the Arbitrary Lagrangian–Eulerian (ALE) approach is presented. This comparison aims to verify the ALE's approach suitability for modeling thermomechanical processes. After that, a study on the material's stress state evolution inside the specimen is provided. The stress state is evaluated through the triaxiality factor and Lode parameter. Ideally, under pure compression, these parameters' values are − 1/3 and − 1, respectively. However, it is not possible to achieve ideal conditions in actual experiments. The Lagrangian model was done in QForm, and the ALE model was done in LS-Dyna. The results from both models are in good agreement between them and agree with the force vs. stroke measured during the experiments. Two paths were defined to study the stress state inside the sample, in the radial direction (equator line) and axial direction (axial line). It was concluded that some areas in both paths might be considered as approximately under pure compression stress state. In addition, the ALE approach accuracy for thermomechanical modeling was verified.

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Development and validation of a finite-element model for isothermal forging of a nickel-base superalloy

Cited by 21 publications

References 26 publications

A Controlled Material Flow Forming Mechanism of Curve Cutter Forging in The Hot Impression Forging of The Medical Instrument

A Controlled Material Flow Forming Mechanism of Curve Cutter Forging in The Hot Impression Forging of The Medical Instrument

Computer and physical modeling of multiple isothermal forging of EK61 superalloy

Numerical study on the hot compression test for bulk metal forming application

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