Study on Constitutive Model of 20CrMnTi Gear Steel in Cutting Process

Flow stress data is important base data in using the analytical method and the finite element method to analyze the metal cutting process.In the present study, a comprehensive method combining with four methods of material mechanics tests, SHTB impact tests, two-dimensional orthogonal slot milling experiments and reverse solving is used to determine constitutive model (flow stress model) as a function of the "three-high" (high strain , temperature and strain rate) in metal cutting. The constitutive model of 20CrMnTi gear steel (hardened to170±5HB) which is one of China’s main gear steels in cutting deformation is established by using this method, and experimental results show that the model’s accuracy is high. Practice has proved that the methodology of constitutive model determination for metal cutting deformation, proposed in the present study, has advantages when compared with using one method alone, and is more suitable to establish flow data for the various materials in the metal cutting process.

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An Integral Method to Determine Workpiece Flow Stress and Friction Characteristics in Metal Cutting

International Journal of Automation Technology ◽

10.20965/ijat.2015.p0775 ◽

2015 ◽

Vol 9 (6) ◽

pp. 775-781

Author(s):

Norfariza Wahab ◽

◽

Yumi Inatsugu ◽

Satoshi Kubota ◽

Soo-Young Kim ◽

...

Keyword(s):

Flow Stress ◽

Strain Rate ◽

Cutting Forces ◽

High Speed ◽

Metal Cutting ◽

Cutting Edge ◽

Cutting Process ◽

Machining Parameters ◽

Friction Characteristics ◽

High Speed Cutting

In recent times, numerical simulation techniques have been commonly used to estimate and predict machining parameters such as cutting forces, stresses, and temperature distribution. However, it is very difficult to estimate the flow stress of a workpiece and the friction characteristics at a tool/chip interface, particularly during a high-speed cutting process. The objective of this study is to improve the accuracy of the present method and simultaneously determine the characteristics of the flow stress of a workpiece and friction at the cutting edge under a high strain rate and temperature during the cutting process. In this study, the Johnson-Cook (JC) flow stress model is used as a function of strain, strain rate, and temperature. The friction characteristic was estimated by minimizing the difference between the predicted and measured results of principal force, thrust force, and shear angle. The shear friction equation was used to estimate the friction characteristics. Therefore, by comparing the measured values of the cutting forces with the predicted results from FEM simulations, an expression for workpiece flow stress and friction characteristics at the cutting edge during a high-speed cutting process was estimated.

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On the performance of modified Zerilli-Armstrong constitutive model in simulating the metal-cutting process

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2017.06.011 ◽

2017 ◽

Vol 28 ◽

pp. 253-265 ◽

Cited By ~ 13

Author(s):

Murali Mohan Gurusamy ◽

Balkrishna C. Rao

Keyword(s):

Constitutive Model ◽

Metal Cutting ◽

Cutting Process

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FLOW STRESS DATA FOR FINITE ELEMENT SIMULATION IN METAL CUTTING: A PROGRESS REPORT ON MADAMS

Machining Science and Technology ◽

10.1081/mst-200059068 ◽

2005 ◽

Vol 9 (2) ◽

pp. 271-288 ◽

Cited By ~ 10

Author(s):

Partchapol Sartkulvanich ◽

Taylan Altan ◽

Joerg Soehner

Keyword(s):

Finite Element ◽

Flow Stress ◽

Finite Element Simulation ◽

Metal Cutting ◽

Progress Report ◽

Element Simulation ◽

Flow Stress Data

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Flow Stress Determination of Aluminum Alloy 7050-T7451 Using Inverse Analysis Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.431-432.174 ◽

2010 ◽

Vol 431-432 ◽

pp. 174-177

Author(s):

Zhong Qiu Wang ◽

Jian Feng Li ◽

Jie Sun ◽

Feng Jiang ◽

Jun Zhou

Keyword(s):

Flow Stress ◽

Cutting Forces ◽

Metal Cutting ◽

Computer Code ◽

Equation Modeling ◽

Fem Model ◽

Cutting Experiment ◽

Flow Stress Data ◽

Material Constitutive Equation

In the present study, two-dimensional orthogonal slot milling experiments in conjunction with an analytical-based computer code are used to determine flow stress data as a function of the high strains, strain rates and temperatures encountered in metal cutting. By using this method, the flow stress of Al7050-T7451 is modeled. Through the comparison of cutting forces between FEM and experiment, the FEM model using predicted flow stress can give precise cutting forces. The work of this paper provides a useful method for material constitutive equation modeling without doing large number of cutting experiment or expensive SHPB tests.

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Inverse identification of flow stress in metal cutting process using Response Surface Methodology

Simulation Modelling Practice and Theory ◽

10.1016/j.simpat.2015.09.009 ◽

2016 ◽

Vol 60 ◽

pp. 40-53 ◽

Cited By ~ 25

Author(s):

Amir Malakizadi ◽

Stefan Cedergren ◽

Ibrahim Sadik ◽

Lars Nyborg

Keyword(s):

Response Surface Methodology ◽

Flow Stress ◽

Response Surface ◽

Metal Cutting ◽

Cutting Process ◽

Inverse Identification

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A new approach to the determination of plastic flow stress and failure initiation strain for aluminum alloys cutting process

Computational Materials Science ◽

10.1016/j.commatsci.2014.08.029 ◽

2014 ◽

Vol 95 ◽

pp. 568-578 ◽

Cited By ~ 19

Author(s):

Guang Chen ◽

Jun Li ◽

Yinglun He ◽

Chengzu Ren

Keyword(s):

Flow Stress ◽

Aluminum Alloys ◽

Plastic Flow ◽

Cutting Process ◽

New Approach ◽

Failure Initiation ◽

Plastic Flow Stress

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Constitutive Modeling for Flow Stress Behavior of Nimonic 80A Superalloy During Hot Deformation Process

High Temperature Materials and Processes ◽

10.1515/htmp-2014-0204 ◽

2016 ◽

Vol 35 (3) ◽

pp. 327-336 ◽

Cited By ~ 2

Author(s):

Sendong Gu ◽

Liwen Zhang ◽

Chi Zhang ◽

Wenfei Shen

Keyword(s):

Flow Stress ◽

Constitutive Model ◽

Hot Deformation ◽

Critical Strain ◽

Volume Fraction ◽

Constitutive Models ◽

Avrami Equation ◽

Peak Strain ◽

Compression Tests ◽

Nimonic 80A

AbstractThe hot deformation characteristics of nickel-based alloy Nimonic 80A were investigated by isothermal compression tests conducted in the temperature range of 1,000–1,200°C and the strain rate range of 0.01—5 s–1on a Gleeble-1500 thermomechanical simulator. In order to establish the constitutive models for dynamic recrystallization (DRX) behavior and flow stress of Nimonic 80A, the material constantsα,nand DRX activation energyQin the constitutive models were calculated by the regression analysis of the experimental data. The dependences of initial stress, saturation stress, steady-state stress, dynamic recovery (DRV) parameter, peak strain, critical strain and DRX grain size on deformation parameters were obtained. Then, the Avrami equation including the critical strain for DRX and the peak strain as a function of strain was established to describe the DRX volume fraction. Finally, the constitutive model for flow stress of Nimonic 80A was developed in DRV region and DRX region, respectively. The flow stress values predicted by the constitutive model are in good agreement with the experimental ones, which indicates that the constitutive model can give an accurate estimate for the flow stress of Nimonic 80A under the deformation conditions.

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A Flow Stress Model of 300M Steel for Isothermal Tension

Materials ◽

10.3390/ma14020252 ◽

2021 ◽

Vol 14 (2) ◽

pp. 252

Author(s):

Rongchuang Chen ◽

Shiyang Zhang ◽

Xianlong Liu ◽

Fei Feng

Keyword(s):

Flow Stress ◽

Constitutive Model ◽

Tensile Deformation ◽

Flow Behavior ◽

Tensile Tests ◽

Uniaxial Tensile ◽

Model Parameters ◽

Average Deviation ◽

Cross Sectional ◽

300M Steel

To investigate the effect of hot working parameters on the flow behavior of 300M steel under tension, hot uniaxial tensile tests were implemented under different temperatures (950 °C, 1000 °C, 1050 °C, 1100 °C, 1150 °C) and strain rates (0.01 s−1, 0.1 s−1, 1 s−1, 10 s−1). Compared with uniaxial compression, the tensile flow stress was 29.1% higher because dynamic recrystallization softening was less sufficient in the tensile stress state. The ultimate elongation of 300M steel increased with the decrease of temperature and the increase of strain rate. To eliminate the influence of sample necking on stress-strain relationship, both the stress and the strain were calibrated using the cross-sectional area of the neck zone. A constitutive model for tensile deformation was established based on the modified Arrhenius model, in which the model parameters (n, α, Q, ln(A)) were described as a function of strain. The average deviation was 6.81 MPa (6.23%), showing good accuracy of the constitutive model.

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