Journal ArticleDOI
Laser-induced shock compression of monocrystalline copper: characterization and analysis
Marc A. Meyers,Fabienne Grégori,Bimal K. Kad,M. S. Schneider,Daniel H. Kalantar,Bruce Remington,Guruswami Ravichandran,T. R. Boehly,Justin Wark +8 more
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TLDR
In this paper, a method for estimating dislocation densities is proposed, based on nucleation of loops at the shock front and their extension due to residual shear stresses behind the front.About:
This article is published in Acta Materialia.The article was published on 2003-03-14. It has received 219 citations till now. The article focuses on the topics: Slip (materials science) & Crystal twinning.read more
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Microstructure and mechanical properties of copper subjected to cryogenic laser shock peening
TL;DR: In this article, the microstructure of copper after processing is characterized by transmission electron microscopy (TEM) and it is found that high material strength with good thermal stability is achieved after CLSP.
Journal ArticleDOI
Experiment investigation on microstructure and mechanical properties of TC17 titanium alloy treated by laser shock peening with different laser fluence
TL;DR: In this article, microstructure, microhardness, and residual stress of TC17 titanium alloy treated by laser shock peening (LSP) with different laser fluence were examined and compared by x-ray diffraction, scanning electron microscope, transmission electron microscope.
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Shock Hugoniot of single crystal copper
TL;DR: In this article, the photonic doppler velocimetry (PDV) diagnostic was adapted into a very high precision time of arrival detector for these experiments and the measured Hugoniots along all three crystal directions were nearly identical to the experimental Hugoniot for polycrystalline Cu.
Journal ArticleDOI
A fully anisotropic single crystal model for high strain rate loading conditions with an application to α-RDX
Suvranu De,A. Zamiri,Rahul +2 more
TL;DR: In this paper, a fully anisotropic, nonlinear, thermodynamically consistent model for single crystals under high rates of loading with thermodynamic consistent decoupling of the stress tensor into hydrostatic and deviatoric components was developed.
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Real time synchrotron x-ray diffraction measurements to determine material strength of shocked single crystals following compression and release
TL;DR: In this article, the authors used real-time, synchrotron x-ray diffraction measurements to determine the strength of shocked single crystals following compression and release during uniaxial strain loading.
References
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Book
Dynamic Behavior of Materials
TL;DR: In this paper, the authors present a method to produce dynamic deformation at high strain rates by using Shear Bands (Thermoplastic Shear Instabilities) and dynamic fracture.
Journal ArticleDOI
Dislocation-mechanics-based constitutive relations for material dynamics calculations
TL;DR: An improved description of copper and ironcylinder impact (Taylor) test results has been obtained through the use of dislocation-mechanics-based constitutive relations in the Lagrangian material dynamics computer program EPIC•2.
Journal ArticleDOI
The onset of twinning in metals: a constitutive description
TL;DR: In this article, a constitutive expression for the twinning stress in BCC metals is developed using dislocation emission from a source and the formation of pile-ups, as rate-controlling mechanism.
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Dislocation nucleation from a crack tip : an analysis based on the Peierls concept
TL;DR: In this paper, a periodic relation between shear stress and atomic shear displacement is assumed to hold along the most highly stressed slip plane emanating from a crack tip, which allows some small slip displacement to occur near the tip in response to small applied loading and, with increase in loading, the incipient dislocation configuration becomes unstable and leads to a fully formed dislocation which is driven away from the crack.
Journal ArticleDOI
The size of a dislocation
TL;DR: In this paper, the size of a dislocation and critical shear stress for its motion were calculated for a single dislocation with respect to the size and motion of the dislocation.