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Search Publications by: Lyle E. Levine (Fed)

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Displaying 201 - 225 of 269

AFM Observations of Slip Band Development in AI Single Crystals

October 16, 2008
Author(s)
D E. Kramer, M Savage, Lyle E. Levine
In situ atomic force microscopy (AFM) is used to observe the structure and evolution of slip bands on the surface of plastically deformed aluminum single crystals. Both the structure and evolution of the slip bands are observed to be a function of the

Complementary Experimental Techniques for Multi-Scale Modeling of Plasticity

October 16, 2008
Author(s)
Lyle E. Levine, Gabrielle G. Long, David R. Black
Some recently-developed experimental techniques, such as in situ ultra-small-angle X-ray scattering (USAXS), have demonstrated a capability for measuring aspects of dislocation structure evolution that are inaccessible to other experimental methods

Crystal Asymmetry Induces Single-Atom Chain Formation in Gold Nanowires

October 16, 2008
Author(s)
Francesca Tavazza, A Hasmy, Lyle E. Levine, Anne M. Chaka, Luis C. Rincon, M Marquez, Carlos A. Gonzalez
We performed density functional theory and tight-binding molecular dynamics calculations to investigate the formation of suspended linear atom chains when stretching gold nanowires along the [110] crystal orientation. We determined that the chain formation

Deformation of Metals

October 16, 2008
Author(s)
R M. Thomson, Lyle E. Levine, Y Shim
Plastic deformation of a metal is possible because of the production and motion of large numbers of dislocations. Dislocations are one dimensional flexible spaghetti-like defects that interact with one another with both long range (1/r) and short range

Preface to Dislocatrions 2000 Proceedings

October 16, 2008
Author(s)
Lyle E. Levine, L -. Kubin, R -. Becker
During the 1950's and 1960's, a widespread international effort was underway to lay the foundations for a fundamental, dislocations-based understanding of plastic deformation and strain hardening. This effort lagged, however, as the existing theoretical

Self Assembly of a Nanoscale 3D Conductive Network Within an Amorphous Polymer

October 16, 2008
Author(s)
Lyle E. Levine, Gabrielle G. Long, R A. Gerhardt, R Ou, Jan Ilavsky, C A. Parker
The realization of a 3D network of self-assembled conductive nanowires embedded within an insulating matrix is demonstrated. The lengths, three-dimensional configurations and electrical connectivity of test wire networks are characterized. straight

Single-Crystal Plasticity: Statistical Physics and Experiments

October 16, 2008
Author(s)
Lyle E. Levine, R M. Thomson, M Savage, D E. Kramer, Y Shim
Although deformation usually appears to be a smooth process at the macroscopic scale, at smaller scales it is highly heterogeneous in both time and space, with fluctuations playing a crucial role. Over the past several years, we have used a variety of

Slip Bands in Deforming Metals

October 16, 2008
Author(s)
R M. Thomson, Lyle E. Levine, M Savage
It is proposed that a deforming solid is composed of two types of deforming regions: regions of percolating slip (slip bands) and regions of non percolating slip (matrix). The slip bands are identified with channels between GNB's (Geometrically Necessary