Experimental results of tantalum material strength at high pressure and high strain rate

Park, Hyesook; Barton, Nathan R.; Belof, Jonathan L.; Blobaum, K M; Cavallo, R. M.; Comley, A. J.; Maddox, Brian; May, Mark; Pollaine, S. M.; Prisbrey, Shon; Remington, B. A.; Rudd, Robert E.; Swift, David W.; Wallace, R. J.; Wilson, M.J.; Nikroo, A.; Giraldez, E.

doi:10.1063/1.3686536

Cited by 24 publications

(16 citation statements)

References 5 publications

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“…Subsequently, for results presented in Ref. 16, g ¼ 2 has been used to account for the plastic strain rate supported by edge dislocations. This factor is based on revised analysis of dislocation dynamics calculations for tantalum over a variety of strain rates, and g ¼ 2 is used in all of the results presented here.…”

Section: Constitutive Modelmentioning

confidence: 99%

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A multiscale strength model for tantalum over an extended range of strain rates

Barton

Rhee

2013

Journal of Applied Physics

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Section: Constitutive Modelmentioning

confidence: 99%

“…1, 16 We simulate an idealized Rayleigh-Taylor type experiment with a peak loading pressure of roughly 1 Mbar, similar to the Rayleigh-Taylor calculations in Ref. 1.…”

Section: Demonstration Calculationsmentioning

confidence: 99%

A multiscale strength model for tantalum over an extended range of strain rates

Barton

Rhee

2013

Journal of Applied Physics

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“…The high-strain-rate behavior of tantalum 49,50 and vanadium 50-52 over the megabar pressure range was recently studied by advanced method based on the Rayleigh-Taylor instabilities and interpreted in terms of the dislocation theory. This approach, however, requires computer simulations with some supposed material model, and averages the data over significant strain range.…”

Section: Discussionmentioning

confidence: 99%

Tantalum and vanadium response to shock-wave loading at normal and elevated temperatures. Non-monotonous decay of the elastic wave in vanadium

Zaretsky

Kanel

2014

Journal of Applied Physics

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Effect of temperature, strain, and strain rate on the flow stress of aluminum under shock-wave compression J. Appl. Phys. 112, 073504 (2012); 10.1063/1.4755792 Modeling of the elastic precursor behavior and dynamic inelasticity of tantalum under ramp wave loading to 17 GPa J. Appl. Phys. 107, 083508 (2010); 10.1063/1.3373388 Large elastic wave amplitude and attenuation in shocked pure aluminumThe evolution of the elastic precursor waves in pure tantalum and vanadium is presented at normal and elevated temperatures over propagation distances that ranged from 0.125 to 3 mm. Measurements were performed in order to obtain experimental data about the temperature-rate dependence of the yield stress of the two metals. With increasing propagation distance, the rate of the decay of elastic precursor decreases, as the shear stress in the elastic precursor wave approaches the Peierls stresses. It has been found that the decay, with propagation distance, of the post-spike minimum of the spike-like elastic precursor wave in vanadium is essentially non-monotonous. The experiments also revealed that annealing of tantalum and vanadium increases their Hugoniot elastic limit. The anomalous increase of the high strain rate yield stress with temperature, as observed earlier for some FCC and HCP metals, has not been detected in these measurements. V C 2014 AIP Publishing LLC. [http://dx.

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“…Steinberg [1] extrapolates these derivatives to high pressure and temperature by: where Y is the yield stress. In [2] and [3] they determine changes of yield stress and shear modulus of copper and tantalum at high pressure dynamic loading, and the results generally deviate from the predictions of Steinberg [1].…”

Section: Introductionmentioning

confidence: 86%

Change of shear modulus and yield stress with pressure and temperature

Partom

2017

AIP Conference Proceedings

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Abstract. It is well known that the shear modulus (G) and the yield stress (Y) of metals increase with pressure (P) and decrease with temperature (T). Steinberg, in his popular compendium of dynamic material properties, assumes for Y/Y0(P,T)=G/G0(P,T) linear relations based on derivatives determined experimentally at ambient conditions. But recent tests with high pressure dynamic loadings of certain metals obtained results that generally deviate from Steinberg's predictions. Here we use a different approach to estimate G/G0(P,T). As a first approximation we let G/G0=K/K0, where K is the isentropic bulk modulus. With this assumption we compute the longitudinal sound speed of tantalum along its principal Hugoniot and compare to recent measurements. There is a very slight disagreement, which we can correct by assuming (second approximation) that Poisson ratio decreases slightly with pressure and increases slightly with temperature. As K= c 2 is always available in a hydrocode run from the equation of state, so are therefore also G/G0 and Y/Y0.

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Experimental results of tantalum material strength at high pressure and high strain rate

Cited by 24 publications

References 5 publications

A multiscale strength model for tantalum over an extended range of strain rates

A multiscale strength model for tantalum over an extended range of strain rates

Tantalum and vanadium response to shock-wave loading at normal and elevated temperatures. Non-monotonous decay of the elastic wave in vanadium

Change of shear modulus and yield stress with pressure and temperature

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