Flow stress of shock-hardened Remco iron over strain rates from 0.001 to 9000 s?1

Weston, G. M.

doi:10.1007/bf00729362

Cited by 12 publications

(5 citation statements)

References 3 publications

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“…6 are in good agreement with the experimental results for 400-µm polycrystalline Fe at room temperature by Arnold [25], which can be considered as the most representative of bulk behavior. Our data is also in general agreement with the measurements by Weston [31] for REMCO Fe. However, ref.…”

Section: Physical Implicationssupporting

confidence: 92%

“…In this sense, including (homogeneous) dislocation nucleation may help ease the burdens of strain relief on the original dislocation density imposed by the boundary conditions [32,33,34]. However, this overshoot has been routinely seen experimentally as well [21,31], so that the role of dislocation nucleation may not be as determining as initially thought.…”

Section: Physical Implicationsmentioning

confidence: 99%

“…However, ref. [31] does not include any microstructural information of the as-received material and thus, for the sake of caution, we do not include the data in Fig. 6.…”

Section: Physical Implicationsmentioning

confidence: 99%

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Temperature and high strain rate dependence of tensile deformation behavior in single-crystal iron from dislocation dynamics simulations

Tang

Marian

2014

Acta Materialia

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We conduct dislocation dynamics (DD) simulations of Fe periodic single crystals under tensile load at several high strain rates and temperatures. The simulations are enabled by the recent development of temperature-dependent dislocation mobility relations obtained from atomistic calculations. The plastic evolution in the simulations is governed by rapid initial dislocation multiplication, followed by a saturation of the flow stress when the subpopulation of slow plastic carriers becomes stabilized by dislocation annihilation. Above 500 K, edge dislocations coexist with screw dislocations and contribute proportionaly to the value of the flow stress. The DD simulations are used to interpret shock-loading experiments in Fe in terms of the relative importance of different strengthening mechanisms. We find that in the 10 4 -to-10 6 s −1 strain rate regime, work hardening explains the hardening of shock-loaded bulk Fe crystals.

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Section: Physical Implicationssupporting

confidence: 92%

Section: Physical Implicationsmentioning

confidence: 99%

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Temperature and high strain rate dependence of tensile deformation behavior in single-crystal iron from dislocation dynamics simulations

Tang

Marian

2014

Acta Materialia

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“…That is, the flow stress increases with increasing strain rate. This strain rate dependence is consistent with that of nonporous iron reported in the previous study [8]. However, the difference between the values of flow stress becomes small for p ε 20 30% ≈ − as a result of the appearance of the clear plateau-stress region in the dynamic compression.…”

Section: Resultssupporting

confidence: 91%

Dynamic Compression Behavior of Lotus-Type Porous Iron

Tane

Kawashima

Horikawa

et al. 2010

MSF

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Dynamic and quasi-static compression tests were conducted on lotus-type porous iron with porosity of about 50% using the split Hopkinson pressure bar method and universal testing machine, respectively.　In the dynamic compression parallel to the pore direction, a plateau stress region appears where deformation proceeds at nearly constant stress, while the plateau stress region does not appear in the quasi-static compression. The plateau stress region is probably caused by the buckling deformation of matrix iron which occurs only in the dynamic compression. In contrast, the compression perpendicular to the orientation direction of pores exhibits no plateau-stress regions in the both dynamic and quasi-static compression.

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“…The mechanical properties of pure iron have been extensively studied in the past decades mostly in the context of its response at high strain-rates and pressures, see for example [1,2,3,4,5,6,7,8]. The high pressure is applied either in a quasi-static way using a diamond anvil press, or using shock wave for example in plate-impact experiments of a very short duration [9,10,11].…”

Section: Introductionmentioning

confidence: 99%

A model coupling plasticity and phase transformation with application to dynamic shear deformation of iron

Sadjadpour¹,

Rittel²,

Ravichandran³

et al. 2015

Mechanics of Materials

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Flow stress of shock-hardened Remco iron over strain rates from 0.001 to 9000 s?1

Cited by 12 publications

References 3 publications

Temperature and high strain rate dependence of tensile deformation behavior in single-crystal iron from dislocation dynamics simulations

Temperature and high strain rate dependence of tensile deformation behavior in single-crystal iron from dislocation dynamics simulations

Dynamic Compression Behavior of Lotus-Type Porous Iron

A model coupling plasticity and phase transformation with application to dynamic shear deformation of iron

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