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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Deformation twinning in nanocrystalline materials
TL;DR: In this paper, a review of deformation twinning in nanocrystalline materials is presented, including deformation twins observed by molecular dynamics simulations and experiments, twinning mechanisms, factors affecting the twinning, analytical models on the nucleation and growth of deformations, interactions between twins and dislocations, and the effects of twins on mechanical and other properties.
Journal ArticleDOI
Grain refinement mechanism of multiple laser shock processing impacts on ANSI 304 stainless steel
Jin Zhon Lu,Kaiyu Luo,Yong Kang Zhang,Sun Guifang,Y.Y. Gu,Jianzhong Zhou,Xu Dong Ren,Xian-Cheng Zhang,Ling Feng Zhang,K.M. Chen,C.Y. Cui,Y.F. Jiang,A.X. Feng,Lai-Chang Zhang +13 more
TL;DR: In this article, the micro-structural evolution and grain refinement in ANSI 304 stainless steel subjected to multiple laser shock processing (LSP) impacts were investigated by means of cross-sectional optical microscopy and transmission electron microscopy observations.
Journal ArticleDOI
Grain refinement of LY2 aluminum alloy induced by ultra-high plastic strain during multiple laser shock processing impacts
J.Z. Lu,Kaiyu Luo,Y.K. Zhang,C.Y. Cui,Sun Guifang,Jun Zhou,Lai-Chang Zhang,J. You,K.M. Chen,J.W. Zhong +9 more
TL;DR: In this article, the plastic deformation behavior and the effects of the impact time on the LY2 aluminum (Al) alloy during multiple laser shock processing (LSP) impacts were investigated.
Journal ArticleDOI
Void growth by dislocation emission
TL;DR: In this paper, a criterion for the emission of a dislocation from the surface of a void under remote tension is formulated, analogous to Rice and Thomsons criterion for crack blunting by dislocation emission from the crack tip.
Journal ArticleDOI
Ultrahigh Strength in Nanocrystalline Materials Under Shock Loading
Eduardo M. Bringa,Eduardo M. Bringa,Alfredo Caro,Alfredo Caro,Yinmin Wang,Yinmin Wang,Maximo Victoria,Maximo Victoria,James McNaney,James McNaney,Bruce Remington,Bruce Remington,Raymond F. Smith,Raymond F. Smith,Ben Torralva,Ben Torralva,Helena Van Swygenhoven,Helena Van Swygenhoven +17 more
TL;DR: Molecular dynamics simulations of nanocrystalline copper under shock loading show an unexpected ultrahigh strength behind the shock front, with values up to twice those at low pressure.
References
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Journal ArticleDOI
Mechanical twinning in nickel
R. L. Nolder,G. Thomas +1 more
TL;DR: In this paper, structural and mechanical properties of polycrystalline nickel deformed by shock and loading at room temperature as well as by tensile and compressive testing at various temperatures were investigated.
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Dislocation multiplication behind the shock front
TL;DR: In this article, a new model of fast operated dislocation source based on multiplication and motion of partial dislocations bounding the stacking fault is suggested, which explains the variations of x-ray diffraction pattern for the material undergoing shock compression, the shock induced formation of twins, and shear bands and pre-fracture voids nucleation in the rarefaction wave.
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Transient x-ray diffraction used to diagnose shock compressed Si crystals on the Nova laser
Daniel H. Kalantar,E. A. Chandler,J. D. Colvin,Richard W. Lee,Bruce Remington,S. V. Weber,L. G. Wiley,Allan Hauer,Justin Wark,A. Loveridge,B. H. Failor,Marc A. Meyers,Guruswami Ravichandran +12 more
TL;DR: In this paper, the authors used a hohlraum x-ray drive to record time-resolved information about the shock compression of materials and applied it on Nova shock experiments.
Journal ArticleDOI
Coherence Properties of the Superradiant 5401 Å Pulsed Neon Laser
TL;DR: In this article, the spatial and temporal coherence of the 5401 A pulsed neon laser were measured experimentally and it was shown that although the laser operates in a purely superradiant mode with zero feedback amplification, the output can be coherent over the entire duration of a 2 nsec pulse.
Journal ArticleDOI
Plastic deformation behind strong shock waves
TL;DR: Weertman and Follansbee as discussed by the authors analyzed the dislocation produced plastic deformation that must occur behind the front of strong shock waves and concluded that a strong shock wave front has the following dislocation structure: the shock front, of atomic dimensions, consists of a Smith dislocation interface of dislocations that keep up with the front by moving at transonic or supersonic velocities.