Modeling the viscoplastic flow behavior of a 20MnCr5 steel grade deformed under hot-working conditions, employing a meshless technique

Hostos, Juan C. Álvarez; Bencomo, Alfonso D.; Puchi-Cabrera, E.S.; Guérin, Jean-Dominique; Dubar, Laurent

doi:10.1016/j.ijplas.2018.01.005

Cited by 25 publications

(4 citation statements)

References 40 publications

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“…At present, the research on 20MnCr5 gear steel reported in the literature mainly involves fatigue failure behavior [14], viscoplastic properties [15] and surface treatment [16] of 20MnCr5 gear steel. The hot workability of 20MnCr5 gear steel has also been studied from the perspective of dynamic recrystallization kinetics, but it is not comprehensive to evaluate the hot workability only by dynamic recrystallization behavior [17].…”

Section: Introductionmentioning

confidence: 99%

Strain Modified Constitutive Equation and Processing Maps of High Quality 20MnCr5(SH) Gear Steel

Yang

Wang

Zheng³

et al. 2021

Crystals

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In order to develop the high-temperature forging process of high-quality 20MnCr5(SH) gear steel, according to the physical characteristics of high-temperature hot deformation of 20MnCr5(SH), the single pass hot pressing test was carried out in the temperature range of 930–123 °C and the strain rate range of 0.002–2s−1 by using a Gleeble-1500D thermal simulator. The stress-strain curve of 20MnCr5(SH) was analyzed and confirmed by microstructure analysis. The dynamic recrystallization occurred, and the constitutive equation of 20MnCr5(SH) high temperature flow stress was established. Considering that the traditional Arrhenius constitutive equation does not consider the effect of strain on the constitutive equation, a strain modified Arrhenius constitutive equation is proposed. The results show that the correlation is 0.9895 and the average relative error is 8.048%, which verifies the stress prediction ability of the strain modified constitutive equation. According to the dynamic material theory and instability criterion, the processing maps of 20MnCr5(SH) are obtained. It is therefore considered that 20MnCr5(SH) is most suitable for thermoplastic processing at strain rate of 0.05–1s−1 and temperature of 1030–1100 °C.

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Section: Introductionmentioning

confidence: 99%

Strain Modified Constitutive Equation and Processing Maps of High Quality 20MnCr5(SH) Gear Steel

Yang

Wang

Zheng³

et al. 2021

Crystals

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“…Moreover, the mechanical properties under high strain rate deformation (10 2 -10 3 s − 1 ) have also gained significant focus due to the hazard of high-speed vehicle collision. [7][8][9][10][11] Recently, different research groups [12][13][14][15] have conducted in-depth studies on the mechanical behavior of TWIP steel under different strain rates. The results revealed that TWIP steel exhibits different deformation characteristics under static, quasi-static (e.g., strain rate of 10 −6 -10 −1 s −1 ), and dynamic loadings (e.g., strain rate of 10 0 -10 3 s −1 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of Strain Rate on the Deformation Mechanism of Ultra-high Strength TWIP Steel

Pang

Guo

et al. 2020

ISIJ Int.

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“…Many references also containthe results of studies related to the numerical modeling of heating or deforming non-ferrous metal alloys [9,10,11]. The first findings of studies concerning the high-temperature processing of steel were presented in recent years [12][13][14][15][16][17]. The main factor influencing this fact is the high value of the solidus temperature of steel compared to non-ferrous metals.…”

Section: Introductionmentioning

confidence: 99%

Archives of Foundry Engineering

Hojny,

Dębiński,

Głowacki

et al. 2020

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The paper reports the results of work leading to the construction of a spatial thermo-mechanical model based on the finite element method allowing the computer simulation of physical phenomena accompanying the steel sample testing at temperatures that are characteristic for the soft-reduction process. The proposed numerical model is based upon a rigid-plastic solution for the prediction of stress and strain fields, and the Fourier-Kirchhoff equation for the prediction of temperature fields. The mushy zone that forms within the sample volume is characterized by a variable density during solidification with simultaneous deformation. In this case, the incompressibilitycondition applied in the classic rigid-plastic solution becomes inadequate. Therefore, in the presented solution, a modified operator equation in the optimized power functional was applied, which takes into account local density changes at the mechanical model level (the incompressibility condition was replaced with the condition of mass conservation). The study was supplemented withexamples of numerical and experimental simulation results, indicating that the proposed model conditions, assumptions, and numerical models are correct.

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Modeling the viscoplastic flow behavior of a 20MnCr5 steel grade deformed under hot-working conditions, employing a meshless technique

Cited by 25 publications

References 40 publications

Strain Modified Constitutive Equation and Processing Maps of High Quality 20MnCr5(SH) Gear Steel

Strain Modified Constitutive Equation and Processing Maps of High Quality 20MnCr5(SH) Gear Steel

Effects of Strain Rate on the Deformation Mechanism of Ultra-high Strength TWIP Steel

Archives of Foundry Engineering

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