Results 251 to 260 of about 88,198 (304)

Helical dislocations in aluminum single crystal with a low dislocation density

, 1986
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Dislocation-density kinematics: a simple evolution equation for dislocation density involving movement and tilting of dislocations [PDF]

MRS Communications, 2017
In this paper, a simple evolution equation for dislocation densities moving on a slip plane is proven. This equation gives the time evolution of dislocation density at a general field point on the slip plane, due to the approach of new dislocations and tilting of dislocations already at the field point.
Ngan, AHW, Ngan, A. H.W., A. H. W. Ngan
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Dislocation-density function dynamics – An all-dislocation, full-dynamics approach for modeling intensive dislocation structures

Journal of the Mechanics and Physics of Solids, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
LEUNG, HS, Ngan, AHW
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Limit of Dislocation Density and Dislocation Strengthening in Iron

Materials Science Forum, 2006
The limit of dislocation density was investigated by means of mechanical milling (MM) treatment of an iron powder. Mechanical milling enabled an ultimate severe deformation of iron powder particles and dislocation density in the MM iron powder showed the clear saturation at around the value of 1016m-2.
Koichi Nakashima, M. Suzuki, Y. Futamura, Toshihiro Tsuchiyama, Setsuo Takaki   +4 more
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A Geometric Approach to Dislocation Densities in Semiconductors

Modern Physics Letters B, 2014
Dislocation densities threading semiconductor crystals are a problem for device developers. Among the issues presented by the defect density is the appearance of the so-called shallow levels. In this work, we introduce a geometric model to explain the origin of the observed shallow levels.
K. Bakke, F. Moraes
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Density of turbulence-induced phase dislocations

Applied Optics, 1998
Under certain conditions, light-wave propagation through turbulent media causes a specific type of phase distortion: so-called phase dislocations. A salient feature of phase dislocations is an appearance of zones where the phase turns out to be a multivalued function of coordinates.
V V, Voitsekhovich, D, Kouznetsov, D K, Morozov   +2 more
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A method for avoiding errors in measurements of dislocation density in specimens with a high dislocation density

Proceedings, annual meeting, Electron Microscopy Society of America, 1992
The measurement of dislocation density from electron microscope images of dislocations is an important tool in the hands of the materials scientist. Weak beam images are often chosen for this purpose. In cases where the dislocation density is high, there is a strong possibility that the imaging electrons propagating through the thin foil would ...
K. Z. Botros, S. S. Sheinin
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Comment on “Dislocations Jam at Any Density”

Physical Review Letters, 2012
A Comment on the Letter by G. Tsekenis, N. Goldenfeld, and K. A. Dahmen, Phys. Rev. Lett. 106, 105501 (2011). The authors of the Letter offer a Reply.
I, Groma, G, Györgyi, P D, Ispánovity
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Density-wave theory of dislocations in crystals

Physical Review B, 1988
The density-wave theory of Ramakrishnan and Yussouff is extended to provide a scheme for describing dislocations and other topological defects in crystals. Quantitative calculations are presented for the order-parameter profiles, the atomic configuration, and the free energy of a screw dislocation with Burgers vector b=(a/2, a/2, a/2) in a bcc solid ...
Lakshmi, Raj M, Murthy, Krishna HR, Ramakrishnan, TV   +2 more
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