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
Nucleation and Growth in Nanosystems: Some New Concepts
Book ChapterDOI
Mechanical Properties of AISI 304 SS and its Welded Joint Subjected to Laser Shock Processing
TL;DR: In this article, the effects of a single LSP impact on the nano-hardness, elastic modulus, residual stress, and phase transformation of AISI 304 SS joint are discussed.
Journal ArticleDOI
Structural Transformations in Copper during High-Speed Deformation upon the Convergence of a Massive Cylindrical Shell under Implosion
TL;DR: The deformation structure in copper that forms upon the convergence of a massive cylindrical shell into a cylinder is studied in this article, where it is shown that two types of structures were formed under deformation: regions containing disperse grains with high-angle boundaries and twins and regions with deformation cells having lowangle boundaries.
Journal ArticleDOI
Subgrain geometrically necessary dislocation density mapping in spalled Ta in three dimensions
TL;DR: In this paper , the intragranular distributions of the densities of geometrically necessary dislocations (GNDs) generated in a polycrystalline tantalum (Ta) sample loaded in shock compression to spall are investigated.
Characterization of Plastic Deformation Evolution in Single Crystal and Nanocrystalline Cu During Shock by Atomistic Simulations
TL;DR: In this article, the plastic deformation mechanisms in single crystal and nanocrystalline Cu models were characterized by atomistic simulations for a range of particle velocities from 0.5 to 1.7 km/s and initial temperatures of 5, 300 and 600 K.
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.