Modeling of flow stress of 42CrMo steel under hot compression

Lin, Y.C.; Chen, Mingsong; Zhang, Jun

doi:10.1016/j.msea.2007.11.119

Cited by 196 publications

(96 citation statements)

References 17 publications

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“…Microstructure evolvement model of 42CrMo is obtained based on metallographic experiment. According to references [5][6] , we have the following equations. Constitutive equation:…”

Section: Constitutive Equation and Microstructure Evolvement Model Ofmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation of Microstructure of Workpiece in Closed-open Cross Wedge Rolling

Zi-rong¹,

Shu²,

Ma³

et al. 2016

Proceedings of The6th International Conference on Mechatronics, Materials, Biotechnology and Environment (ICMMBE 2016)

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Abstract.Closed-open cross wedge rolling(CWR) is a kind of advanced precision forming technology, which can effectively reduce or even eliminate the concave. The workpiece is processed from the shaft end to the middle by the rolls first, and then machined by open CWR. An auto pump shaft is taken as the research object. A 3D coupling thermal, mechanical, microstructural finite element model is established by the finite element analysis software DEFORM-3D according to the constitutive equation and microstructure evolvement model of 42CrMo. Distribution laws of temperature field and microstructure field are acquired. This work not only lays a theoretical foundation for improving the product quality and the comprehensive performance of rolled piece, but also provides a guideline for further application and extension of closed-open CWR.

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“…Microstructure evolvement model of 42CrMo is obtained based on metallographic experiment. According to references [5][6] , we have the following equations. Constitutive equation:…”

Section: Constitutive Equation and Microstructure Evolvement Model Ofmentioning

confidence: 99%

“…Lin etal [5][6] from Central South University derive the constitutive equations of rheological stress of 42CrMo steel under high temperature condition based on the thermal simulation experiment and metallographic experiment, and then study the microstructure evolution law of 42CrMo steel during high temperature deformation. M.T.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Microstructure of Workpiece in Closed-open Cross Wedge Rolling

Zi-rong¹,

Shu²,

Ma³

et al. 2016

Proceedings of The6th International Conference on Mechatronics, Materials, Biotechnology and Environment (ICMMBE 2016)

View full text Add to dashboard Cite

show abstract

“…In recent years, this equation has been improved by considering the special effects of the hot forming parameters (such as activation energy of deformation Q, material constants n and α, and structure factor A) to accurately describe and predict the flow stress for the different metals or alloys. Lin et al proposed a revised hyperbolic sine constitutive equation, in which the influence of strain was incorporated by considering the effect of strain to predict the flow stress of 42CrMo steel [9][10][11] . Later, the improved Arrhenius-type equation was effective for describing the high temperature flow behaviors of cast A356 aluminum alloy 12 , 9Cr-1Mo ferritic steel 13 , Ti-6Al-4V alloy 14 , T24 steel [15][16] .…”

Section: Introductionmentioning

confidence: 99%

The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy

Quan

Shi

et al. 2013

Mat. Res.

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In order to study the hot working behaviour of as-cast AZ80 magnesium alloy, a series of isothermal upsetting tests with height reduction of 60% were performed at the temperature range of 523-673 K and the strain rate range of 0.01-10 s -1 on a servo-hydraulic Gleeble-1500 machine simulator. Based on the regression analysis for Arrhenius type equation of flow stress, the activation energy of deformation was determined to be Q = 168.6606 KJ·mol -1 , and material constants A, n and α in the equation also were calculated respectively to predict the peak stress during hot deformation. A 7 th order polynomial was used to represent the influence of strain on these parameters (i.e Q, lnA, n and α). The Arrhenius equation was further developed by taking account of the effect of strain on the flow stress to describe the flow behavior during the whole experimental temperature and strain rate range. Then comparison between the predicted results and test results shows that the correlation coefficient and average absolute relative error is 0.99 and 6.63%, respectively. The flow stress predicted by developed equation can give an accurate and precise description of the flow behaviour for AZ80 magnesium alloy.

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“…Meanwhile, numerical methods such as finite element (FE) simulation have recently been successfully applied for the analysis of various metal-forming processes (Ref [13][14][15]. A constitutive equation is used as the FE input code for simulating the response of materials in specified loading conditions (Ref 16,17). Therefore, the accuracy of the numerical simulation largely depends on the accuracy of the deformation behavior of the material which is being represented by the constitutive equation (Ref 18).…”

Section: Introductionmentioning

confidence: 99%

A Modified Constitutive Equation for Aluminum Alloy Reinforced by Silicon Carbide Particles at Elevated Temperature

Yang

Yuan

et al. 2013

J. of Materi Eng and Perform

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In this paper, the constitutive relationship of an aluminum alloy reinforced by silicon carbide particles is investigated using a new method of double multivariate nonlinear regression (DMNR) in which the strain, strain rate, deformation temperature, and the interaction effect among the strain, strain rate, and deformation temperature are considered. The experimental true stress-strain data were obtained by isothermal hot compression tests on a Gleeble-3500 thermo-mechanical simulator in the temperature range of 623-773 K and the strain rate range of 0.001-10 s 21 . The experiments showed that the material-softening behavior changed with the strain rate, and it changed from dynamic recovery to dynamic recrystallization with an increase in the strain rate. A new constitutive equation has been established by the DMNR; the correlation coefficient (R) and average absolute relative error (AARE) of this model are 0.98 and 7.8%, respectively. To improve the accuracy of the model, separate constitutive relationships were obtained according to the softening behavior. At strain rates of 0.001, 0.01, 0.1, and 1 s 21 , the R and AARE are 0.9865 and 6.0%, respectively; at strain rates of 5 and 10 s 21 , the R and AARE are 0.9860 and 3.0%, respectively. The DMNR gives an accurate and precise evaluation of the flow stress for the aluminum alloy reinforced by silicon carbide particles.

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Modeling of flow stress of 42CrMo steel under hot compression

Cited by 196 publications

References 17 publications

Numerical Simulation of Microstructure of Workpiece in Closed-open Cross Wedge Rolling

Numerical Simulation of Microstructure of Workpiece in Closed-open Cross Wedge Rolling

The improved arrhenius model with variable parameters of flow behavior characterizing for the as-cast AZ80 magnesium alloy

A Modified Constitutive Equation for Aluminum Alloy Reinforced by Silicon Carbide Particles at Elevated Temperature

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