A modified Johnson–Cook model for tensile behaviors of typical high-strength alloy steel

Lin, Y.C.; Chen, Xiaomin; Ge, Lei

doi:10.1016/j.msea.2010.07.061

Cited by 327 publications

(137 citation statements)

References 19 publications

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“…A modified Johnson-Cook model was proposed by Lin [15] to overcome these drawbacks, and has been successfully applied to predict the flow stress in 20CrMo [8], titanium matrix composites (TiCp/Ti) [16], and Co-27Cr-5Mo alloy [17], etc. An Arrhenius-type model was applied to hot working by Sellars and Tegart.…”

Section: Introductionmentioning

confidence: 99%

Correction of Flow Curves and Constitutive Modelling of a Ti-6Al-4V Alloy

Dong

Zhang

et al. 2018

Metals

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Abstract:Isothermal uniaxial compressions of a Ti-6Al-4V alloy were carried out in the temperature range of 800-1050 • C and strain rate range of 0.001-1 s −1 . The effects of friction between the specimen and anvils as well as the increase in temperature caused by the high strain rate deformation were considered, and flow curves were corrected as a result. Constitutive models were discussed based on the corrected flow curves. The correlation coefficient and average absolute relative error for the strain compensated Arrhenius-type constitutive model are 0.986 and 9.168%, respectively, while the values for a modified Johnson-Cook constitutive model are 0.924 and 22.673%, respectively. Therefore, the strain compensated Arrhenius-type constitutive model has a better prediction capability than a modified Johnson-Cook constitutive model.

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Section: Introductionmentioning

confidence: 99%

Correction of Flow Curves and Constitutive Modelling of a Ti-6Al-4V Alloy

Dong

Zhang

et al. 2018

Metals

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“…Compared with Arrhenius equation, JC constitutive equation has the characteristic of simple parameters. It is used to predict the rheological behavior of the material with little change in the flow stress after the peak stress, but the prediction effect is not ideal for the complex rheological behavior of those materials [35,47,48]. It is found that the second order polynomial can more accurately describe the relationship between flow stress and strain, rather than the original exponential expression.…”

Section: The Original Jc Model and Its Modified Equationmentioning

confidence: 99%

“…As one of the empirical models, JC model was widely used with simple expression and only five material constants, and the strain rate hardening and thermal softening effect are taken into account [32,33]. Considering the interaction of temperature, strain and strain rate on the alloys flow stress of 30Cr2Ni4MoV rotor steel and a typical high-strength alloy steel, Wang et al [34] and Lin et al [35] have made appropriate changes to the original JC model to describe the flow stress responses of the alloys under different hot deformation conditions. In the modified models, the JC model parameters are often expressed as a function of strain, strain rate, and temperature.…”

Section: Introductionmentioning

confidence: 99%

A Modified Johnson-Cook Model for Hot Deformation Behavior of 35CrMo Steel

Wang

Huang

Xiao

et al. 2017

Metals

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Abstract:In this work, a compression experiment of 35CrMo steel is carried out over a wide range of temperatures (1123-1423 K) and strain rates (0.1-10 s −1 ) to obtain further understandings of the flow behaviors. The results show that the strain hardening effect of 35CrMo steel is stronger than that of dynamic recrystallization at low temperature and high strain rate; on the contrary, the rheological curves show typical dynamic recrystallization characteristics at high temperature and low strain rate. This indicates that the strain hardening and recrystallization behavior of 35CrMo steel is affected by temperature, strain and strain rate, and its true stress-strain curves can be observed typical work hardening and dynamic softening features. A modified Johnson-Cook (JC) model is developed to predict the flow stress of the alloy. The results of the comparison show that the predicted values of the modified JC model are in good agreement with the experimental values.

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“…Meanwhile, it has a simple form with mechanical properties that can be described using only five parameters. Thus, it has been widely used in various engineering applications [16][17]. Therefore, it is also suitable for the thermal coupling problem in high speed cold roll-beating forming of 40Cr.…”

Section: Dynamic Plasticity Constitutive Equation Of 40cr Quenched Anmentioning

confidence: 99%

ANALYZING THE THERMAL MECHANICAL COUPLING OF 40Cr COLD ROLL-BEATING FORMING PROCESS BASED ON THE JOHNSON–COOK DYNAMIC CONSTITUTIVE EQUATION

Li¹,

Li²,

Yang³

et al. 2015

IJHT

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To explore the forming mechanism of cold roll-beating forming technology, the parameters of the Johnson-Cook (J-C) dynamic constitutive equation for 40Cr are determined using experimental methods. Using the finite element software ABAQUS and tracking of the key node temperature we simulate both the temporal temperature distribution and the equivalent stress and strain distributions with and without consideration of the thermal effects of the 40Cr high-speed cold roll-beating forming process. The predicted flow stress based on the constitutive equations and the real stress are compared with the experimental data. Based on these comparisons, the true stress calculated based on the model and the predicted flow stress are both consistent with the experimental data. The dynamic constitutive model presented in this paper can effectively predict plastic flow stress for 40Cr quenched and tempered steel under various temperatures and the model also provides the theoretical basis for the further assessment of the thermal mechanical coupling effects of 40Cr high -speed cold roll-beating forming process.

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A modified Johnson–Cook model for tensile behaviors of typical high-strength alloy steel

Cited by 327 publications

References 19 publications

Correction of Flow Curves and Constitutive Modelling of a Ti-6Al-4V Alloy

Correction of Flow Curves and Constitutive Modelling of a Ti-6Al-4V Alloy

A Modified Johnson-Cook Model for Hot Deformation Behavior of 35CrMo Steel

ANALYZING THE THERMAL MECHANICAL COUPLING OF 40Cr COLD ROLL-BEATING FORMING PROCESS BASED ON THE JOHNSON–COOK DYNAMIC CONSTITUTIVE EQUATION

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