Theoretical equation of state for aluminum

Kerley, Gerald I.

doi:10.1016/0734-743x(87)90059-5

Cited by 111 publications

(52 citation statements)

References 13 publications

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“…A previous study had demonstrated the transparency of LiF windows to stresses of 1.2 Mbar [20]. A symmetric impact experiment at 8.62 krds using both tantalum as a target and as a flier plate, however, did not yield a release profile measurement similar to those in Figure 4.…”

Section: Transparencymentioning

confidence: 88%

“…Figure 2(a) shows the radiograph of an experiment in which a 0.56 mm titanium alloy (Ti-6A1-4V) flier-plate is launched at 9.6 km/s prior to impacting a 2.0 mm thick titanium alloy target. The lithium-fluoride window [20] is clearly seen in the radiograph in Figure 2(a). The flat portion of the flier-plate prior to impact as observed in the radiograph is 19 mm.…”

Section: Recent H%l Exderiments -Wave Profile Measurementsmentioning

confidence: 90%

“…The successful measurements shown in Figure 4 demonstrate the transparency of the lithium-fluoride (LiF) window at much higher pressures (and temperatures) than this window material has ever been subjected to before [20], i.e., to 1.5 Mbar and 2.0 Mbar, respectively, in the aluminum and titanium experiment. A previous study had demonstrated the transparency of LiF windows to stresses of 1.2 Mbar [20].…”

Section: Transparencymentioning

confidence: 98%

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Time-resolved particle velocity measurements at impact velocities of 10 km/s

Furnish

Chhabildas

Reinhart

1999

International Journal of Impact Engineering

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SUN 3 0 1998Albuquerque, NM 871 85-1 18 1 Hypervelocity launch capabilities (9 -16 M s ) with macroscopic plates have become available in recent years. It is now feasible to conduct instrumented plane-wave tests using this capability. Successfully conducting such tests requires a planar launch and impact at hypervelocities, appropriate triggering' for recording systems, and time-resolved measurements of motion or stress at a particular point or set of points within the target or projectile during impact. We have conducted the first time-resolved wave-profile experiments using velocity interferometric techniques at impact velocities of 10 Ms. These measurements show that aluminum continues to exhibit normal release behavior to 16 1 GPa shock pressure, with complete loss of strength of the shocked state. These experiments have allowed a determination of shock-wave window transparency in conditions produced by a hypervelocity impact. In particular, lithiup fluoride appears to lose transparency at a shock stress of 200 GPa; this appears to be the upper limit for conventional wave profile measurements using velocity interferometric M

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Section: Transparencymentioning

confidence: 88%

Section: Recent H%l Exderiments -Wave Profile Measurementsmentioning

confidence: 90%

Section: Transparencymentioning

confidence: 98%

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Time-resolved particle velocity measurements at impact velocities of 10 km/s

Furnish

Chhabildas

Reinhart

1999

International Journal of Impact Engineering

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“…Hugoniot states for two different, widely used models for aluminum, SESAME 3719 [1] and 3700 [2]. Notice the significant difference in the behavior near the vapor dome.…”

Section: Introductionmentioning

confidence: 99%

“…(current estimates of the c.p. for aluminum is ~1/8-1/5 solid density and ~6000 K [1][2][3][4]). Furthermore, the relatively large sample sizes and number of samples that can be nearly identically loaded in flyer plate experiments on Z enable a variety of diagnostics to be used to interrogate the shock and release states.…”

Section: Introductionmentioning

confidence: 99%

Equation of state and transport property measurements of warm dense matter.

Knudson¹,

Desjarlais²

2009

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Location of the liquid-vapor critical point (c.p.) is one of the key features of equation of state models used in simulating high energy density physics and pulsed power experiments. For example, material behavior in the location of the vapor dome is critical in determining how and when coronal plasmas form in expanding wires. Transport properties, such as conductivity and opacity, can vary an order of magnitude depending on whether the state of the material is inside or outside of the vapor dome. Due to the difficulty in experimentally producing states near the vapor dome, for all but a few materials, such as Cesium and Mercury, the uncertainty in the location of the c.p. is of order 100%. These states of interest can be produced on Z through highvelocity shock and release experiments. For example, it is estimated that release adiabats from ~1000 GPa in aluminum would skirt the vapor dome allowing estimates of the c.p. to be made. This is within the reach of Z experiments (flyer plate velocity of ~30 km/s). Recent high-fidelity EOS models and hydrocode simulations suggest that the dynamic two-phase flow behavior observed in initial scoping experiments can be reproduced, providing a link between theory and experiment.

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Equation of State of Al Based on the Thomas–Fermi Model

Levashov

Khishchenko

2012

Contrib. Plasma Phys.

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A wide-range semiempirical equation of state for aluminum applicable both at near-normal conditions and in dense plasma is presented. The finite-temperature Thomas-Fermi model is used for the thermal contribution of electrons thus diminishing the number of fitting parameters and giving information about a mean ion charge. The constructed equation of state agrees with majority of available shock-wave data.

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Theoretical equation of state for aluminum

Cited by 111 publications

References 13 publications

Time-resolved particle velocity measurements at impact velocities of 10 km/s

Time-resolved particle velocity measurements at impact velocities of 10 km/s

Equation of state and transport property measurements of warm dense matter.

Equation of State of Al Based on the Thomas–Fermi Model

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