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
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
Citations
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Journal ArticleDOI
Physical constitutive equations for plastic deformation of FCC metals subjected to high strain rate loading
TL;DR: In this paper, a physically based model was developed to investigate face centered cubic (FCC) metals and alloys under high strain rate loadings, which includes kinematics and constitutive e...
Journal ArticleDOI
Non-twinning deformation mechanism of pure copper under high speed electromagnetic forming
TL;DR: In this article, the authors investigate the possible mechanical twinning of copper under a new type of high speed processing technique, and investigate the physical origin of the present phenomenon according to the energy barrier and the critical shear stress that are required for the nucleation of perfect and partial dislocations that determine the formation of twins.
Journal ArticleDOI
Microstructure Evolution and Microhardness of Ultrafine-grained High Carbon Steel during Multiple Laser Shock Processing
TL;DR: In this article, the surface microstructure and microhardness of (ferrite+cementite) microduplex structure of the ultrafine-grained high carbon steel after laser shock processing (LSP) with different impact times were investigated by means of scanning electron microscopy (SEM), TEM, X-ray diffraction (XRD), and micro-hardness measurements.
Book ChapterDOI
Shocked materials at the intersection of experiment and simulation
Hector Lorenzana,James Belak,K. S. Bradley,Eduardo M. Bringa,K. S. Budil,J. U. Cazamias,Bassem S. El-Dasher,James Hawreliak,Jan P. Hessler,Kai Kadau,Dan Kalantar,James McNaney,D. Milathianaki,K. Rosolankova,Damian Swift,M. Taravillo,T. van Buuren,Justin Wark,T. Diaz de la Rubia +18 more
TL;DR: In this paper, the authors exploit existing and new generation ultrabright, ultrafast x-ray sources and large scale molecular dynamics simulations to investigate the real-time physical phenomena that control the dynamic response of materials.
Journal ArticleDOI
The Magnitude and Waveform of Shock Waves Induced by X-ray Lasers in Water
Claudiu A. Stan,Claudiu A. Stan,Koji Motomura,Gabriel Blaj,Yoshiaki Kumagai,Yiwen Li,Daehyun You,Taishi Ono,Armin Kalita,Tadashi Togashi,Shigeki Owada,Kensuke Tono,Makina Yabashi,Tetsuo Katayama,Kiyoshi Ueda +14 more
TL;DR: In this article, the authors determined the time-pressure histories of shocks induced by X-ray laser pulses in liquid water microdrops, by measuring the surface velocity of the microdrops from images recorded during the reflection of the shock at the surface.
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.
Journal ArticleDOI
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.