Effect of low-temperature shock compression on the microstructure and strength of copper

Lassila, D.H.; Shen, T.; Cao, Benyi; Meyers, Marc A.

doi:10.1007/s11661-004-0219-0

Cited by 21 publications

(14 citation statements)

References 16 publications

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“…The shock wave produced by plate impact has initially a square shape ( Fig. 1(a)) [25]. It has a flat top that has a length equal to twice the time required for the wave to travel through the projectile.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The setup used for this experiment is shown in Figure 2(a). It is described in detail by Lassila et al [25]. The copper samples were shocked by an explosion-driven flyer plate, providing an initial pulse duration of 1.4 µs for 30 GPa and 1.1 µs for 60 GPa.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Indeed, the temperature rise in the shear localization areas can be calculated from the constitutive response of copper. This deformationinduced temperature rise was considered earlier by Lassila et al [25]. It is expressed as:…”

Section: Heat Extraction From Shocked Specimensmentioning

confidence: 96%

“…Lasers are unraveling a new frontier in materials under extreme regimes of shock compression Both of the flyer-plate impact [25] and laser [26] techniques have recently been employed to explore the post-shocked microstructures of monocrystalline copper.…”

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confidence: 99%

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Effect of shock compression method on the defect substructure in monocrystalline copper

Cao

Lassila

Schneider

et al. 2005

Materials Science and Engineering: A

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Monocrystalline copper samples with orientations of [001] and [221] were shocked at pressures ranging from 20 GPa to 60 GPa using two techniques: direct drive lasers and explosively driven flyer plates. The pulse duration for these techniques differed substantially: 40 ns for the laser experiments at 0.5 mm into the sample and 1.1 ~1.4 µs for the flyer-plate experiments at 5 mm into the sample. The residual microstructures were dependent on orientation, pressure, and shocking method. The much shorter pulse duration in the laser driven shock yielded microstructures closer to the ones generated at the shock front. For the flyer-plate experiments, the longer pulse duration allows shockgenerated defects to reorganize into lower energy configurations. Calculations show that the post-shock cooling for the laser driven shock is 10 3 ~ 10 4 faster than that for plateimpact shock, propitiating recovery and recrystallization conditions for the latter. At the higher pressure level, extensive recrystallization was observed in the plate-impact samples, while it was absent in the laser driven shock. An effect that is proposed to contribute significantly to the formation of recrystallized regions is the existence of micro-shear-bands, which increase the local temperature beyond the prediction from adiabatic compression.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Heat Extraction From Shocked Specimensmentioning

confidence: 96%

mentioning

confidence: 99%

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Effect of shock compression method on the defect substructure in monocrystalline copper

Cao

Lassila

Schneider

et al. 2005

Materials Science and Engineering: A

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“…[8,11] Dislocation loop diameters as small as 10 nm and plastic instability behavior are reported in postshock deformation tests on copper. [12] The important issue here is to connect the shock model with a TASRA description for dislocation generation.…”

Section: Introductionmentioning

confidence: 99%

Dislocation Mechanics of Shock-Induced Plasticity

Armstrong

Arnold

Zerilli

2007

Metall Mater Trans A

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The constitutive deformation behavior of copper, Armco iron, and tantalum materials is described over a range of strain rates from conventional compressive/tensile testing, through split Hopkinson pressure bar (SHPB) test results, to shock-determined Hugoniot elastic limit (HEL) stresses and the follow-on shock-induced plasticity. A mismatch between the so-called ZerilliArmstrong (Z-A) constitutive equation description of pioneering SHPB measurements for copper provided initial evidence of a transition from the plastic strain rate being controlled by movement of the resident dislocation population to the strain rate being controlled by dislocation generation at the shock front, not by a retarding effect of dislocation drag. The transition is experimentally confirmed by connection with Swegle-Grady-type shock vs plastic strain rate measurements reported for all three materials but with an important role for twinning in the case of Armco iron and tantalum. A model description of the shock-induced plasticity results leads to a pronounced linear dependence of effective stress on the logarithm of the plastic strain rate. Taking into account the Hall-Petch grain size dependence is important in specifying the slip vs twinning transition for Armco iron at increasing strain rates.

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Effect of Explosion on Materials

Бацанов

2018

Shock and Materials

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Effect of low-temperature shock compression on the microstructure and strength of copper

Cited by 21 publications

References 16 publications

Effect of shock compression method on the defect substructure in monocrystalline copper

Effect of shock compression method on the defect substructure in monocrystalline copper

Dislocation Mechanics of Shock-Induced Plasticity

Effect of Explosion on Materials

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