Dislocation density in copper and tantalum subjected to shock compression depending on loading parameters and original microstructure

Podurets, A. M.; Tkachenko, M. I.; Ignatova, O. N.; Lebedev, A. I.; Igonin, V. V.; Raevskii, V. A.

doi:10.1134/s0031918x13050074

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…For example, for Cu, the Swegle–Grady relation is valid for pressures up to σ M = 10.1 GPa (ɛ·=1×108s-1) according to Podurets et al. 12 and Kattoura and Shehadeh. 15 That is obviously lower than σ str = 23.9 GPa and indicates that the Swegle–Grady relation does not hold for the whole range of the weak plastic shock wave regime.…”

Section: Resultsmentioning

confidence: 99%

“…By definition of g with respect to r, with respect to the stress on Rayleigh line, the applied pressure can be expressed as By substituting equations (12), (13), and (15) into equation (10) and higher than the second-order term elimination, S v is obtained from…”

Section: Modeling the Weak Shock Wave Elastic-perfectly Plastic Matermentioning

confidence: 99%

“…There are further problems that cause limitations for the proposed models to be used for an elastic-perfectly plastic material. For example, for Cu, the Swegle-Grady relation is valid for pressures up to M ¼ 10.1 GPa ð _ " ¼ 1 Â 10 8 s À1 Þ according to Podurets et al 12 and Kattoura and Shehadeh. 15 That is obviously lower than s str ¼ 23.9 GPa and indicates that the Swegle-Grady relation does not hold for the whole range of the weak plastic shock wave regime.…”

Section: Limitations Of the Proposed Modelsmentioning

confidence: 99%

“…Malygin et al 11 analytically extracted shock wave parameters using the Swegle-Grady and dislocation dynamics relations and proposed a simple equation for the shock wave profile. However, some experimental data [12][13][14] and multiscale dislocation dynamics plasticity (MDDP) calculations for Cu single crystals at very high pressure loadings 15 show that Swegle-Grady relation is not valid for Cu single crystals above 10 GPa.…”

Section: Introductionmentioning

confidence: 99%

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Semi-analytical modeling of steady weak shock wave front for solid metals following the Swegle–Grady relation

Hallajisany

Vitoria

Zamani

2018

Proceedings of the IMechE

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In this article, the stress–time or speed–time relations for steady weak shock wave fronts and their effective parameters were studied for solid metals (except alkaline metals). The purpose was to determine the effective parameters for steady shock wave fronts and find the relations for prediction of the shape of these profiles in pure metals. First, the range of the steady weak shock wave was determined. Then, based on an empirical relationship for the maximum strain rate in the weak shock wave regime, a relation was assumed for the whole weak shock wave front. Then by utilizing simplified assumptions, such as elastic-perfectly plastic material model, a stress change equation and by integration, two implicit equations were obtained for describing the weak shock wave front profile that one of them was used in the calculations. Subsequently, the strain-hardening material model was used. The strain-hardening material model was further simplified as piecewise linear functions. The same procedure was followed in the strain-hardening model. The results show that the proposed weak shock wave model is adequate for an elastic-perfectly plastic material or a material in which its yield stress has slight change during wave rise. The results of solving the equations simulated the profile of the steady weak shock wave fronts and the strain-hardening model has a better solution than the elastic-perfectly plastic model.

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Section: Resultsmentioning

confidence: 99%

Section: Modeling the Weak Shock Wave Elastic-perfectly Plastic Matermentioning

confidence: 99%

Section: Limitations Of the Proposed Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Semi-analytical modeling of steady weak shock wave front for solid metals following the Swegle–Grady relation

Hallajisany

Vitoria

Zamani

2018

Proceedings of the IMechE

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“…First of all, this manifests itself in an increase in the flow stress [1]. Such a response of metallic materials to the change in the rate of defor mation is the consequence of changes in the micro processes that occur in them and are responsible for their deformation behavior [2,3].…”

Section: Introductionmentioning

confidence: 98%

Elastoplastic behavior of copper upon high-strain-rate deformation

Chembarisova

2015

Phys. Metals Metallogr.

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The deformation behavior of copper under conditions of high strain rate deformation has been investigated based on the model of elastoplastic medium with allowance for the kinetics of plastic deforma tion. Data have been obtained on the evolution of the dislocation subsystem, namely, on the average disloca tion density, density of mobile dislocations, velocity of dislocation slip, concentration of deformation induced vacancies, and density of twins. The coefficient of the annihilation of screw dislocations has been estimated depending on pressure and temperature. It has been shown that severe shear stresses that arise upon high strain rate deformation can lead to a significant increase in the concentration of vacancies. The time of the dislocation annihilation upon their nonconservative motion has been estimated. It has been shown that this time is much greater than the time of the deformation process in the samples, which makes it possible to exclude the annihilation of dislocations upon their nonconservative motion from the active mechanisms of deformation.

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Study on the Microstructure and Corresponding Stress Corrosion Cracking Behavior of Joints of Copper Tubes

Anaman

Sung

et al. 2023

Met. Mater. Int.

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Dislocation density in copper and tantalum subjected to shock compression depending on loading parameters and original microstructure

Cited by 8 publications

References 9 publications

Semi-analytical modeling of steady weak shock wave front for solid metals following the Swegle–Grady relation

Semi-analytical modeling of steady weak shock wave front for solid metals following the Swegle–Grady relation

Elastoplastic behavior of copper upon high-strain-rate deformation

Study on the Microstructure and Corresponding Stress Corrosion Cracking Behavior of Joints of Copper Tubes

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