Parameters Identification of Johnson-Cook Constitutive Equation for Aluminum Brass

Di, Chang Chun; Cui, Kai; Qin, Jun Qi; Wu, Da Lin

doi:10.4028/www.scientific.net/amr.887-888.1032

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…According to the quasi-static experimental data and using the linear least squares [39] method in Statistical Product and Service Solutions 17.0 (SPSS) software (IBM Company, USA) to fit the equation, the following results are obtained: B = 762.079, n = 0.625.…”

Section: Determination Of Parameters a And N In Jc Constitutive Modelmentioning

confidence: 99%

Study on Dynamic Mechanical Properties and Constitutive Model Construction of TC18 Titanium Alloy

Zhang

Wang

et al. 2019

Metals

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In order to investigate the static and dynamic mechanical properties of TC18 titanium alloy, the quasi-static stress–strain curve of TC18 titanium alloy under room temperature was obtained by DNS 100 electronic universal testing machine (Changchun Institute of Mechanical Science Co., Ltd., Changchun, China). Meanwhile, the flow stress–strain curves under different temperatures and strain rates are analyzed by split Hopkinson pressure bar (SHPB) device with synchronous assembly system. On the basis of the two experimental data, the JC constitutive model under the combined action of high temperature and impact load is established using the linear least squares method. The results show the following: the yield strength and flow stress of TC18 titanium alloy increase slowly with the increase of the strain rate, and the strain value corresponding to the yield strength is reduced. With the increase of strain, the flow stress increases at first and then decreases at different temperatures. The strain value corresponding to the transition point rises with the temperature increase, and the corresponding stress value remains basically unchanged. With the increase of experimental temperature, the flow stress shows a downward trend, and the JC constitutive model can predict the plastic flow stress well.

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Section: Determination Of Parameters a And N In Jc Constitutive Modelmentioning

confidence: 99%

Study on Dynamic Mechanical Properties and Constitutive Model Construction of TC18 Titanium Alloy

Zhang

Wang

et al. 2019

Metals

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Hot Deformation Behavior of Alloy 800H at Intermediate Temperatures: Constitutive Models and Microstructure Analysis

Cao

Misra

et al. 2014

J. of Materi Eng and Perform

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The hot deformation behavior of a Fe-Ni-Cr austenitic Alloy 800H was explored in the intermediate temperature range of 825-975°C and strain rate range of 0.01-10 s 21 . The study indicates that dynamic recrystallization (DRX) occurred at 875-975°C for strain rates of 0.01-0.1 s 21 and adiabatic heating generated at high strain rates accelerated the DRX process. Based on the experimental data, the JohnsonCook, modified Johnson-Cook, and Arrhenius-type constitutive models were established to predict the flow stress during hot deformation. A comparative study was made on the accuracy and effectiveness of the above three developed models. The microstructure analysis indicated that all the deformation structures exhibited elongated grains and evidence of some degree of DRX. The multiple DRX at 975°C and 0.01 s 21 led to an increase in the intensity of {001} <100> ''cube'' texture component and a significant reduction in the intensity of {011} <211> ''brass'' component. Additionally, the average values of grain average misorientation and grain orientation spread for deformed microstructure were inversely proportional to the fraction of DRX.

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Parameters Identification of Johnson-Cook Constitutive Equation for Aluminum Brass

Cited by 2 publications

References 3 publications

Study on Dynamic Mechanical Properties and Constitutive Model Construction of TC18 Titanium Alloy

Study on Dynamic Mechanical Properties and Constitutive Model Construction of TC18 Titanium Alloy

Hot Deformation Behavior of Alloy 800H at Intermediate Temperatures: Constitutive Models and Microstructure Analysis

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