Results 261 to 270 of about 32,379 (293)

Dislocation dynamics modelling of dislocation–loop interactions in irradiated metals

Philosophical Magazine, 2005
The resistance dislocation loops provide to the glide of dislocations is an important element of several features of plasticity of irradiated metals. In the present work, a dislocation dynamics model based on the elasticity treatment of dislocations, with self-stress effects included, has been used to investigate the critical applied stress required ...
Z. Rong, V. Mohles, D.J. Bacon *, Yu. N. Osetsky   +3 more
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Study of loop–loop and loop–edge dislocation interactions in bcc iron

Journal of Nuclear Materials, 2000
Recent theoretical calculations and atomistic computer simulations have shown that one-dimensional glissile clusters of self-interstitial atoms (SIAs) play an important role in the evolution of microstructure in metals and alloys under cascade damage conditions.
Yu.N Osetsky, D.J Bacon, F Gao, A Serra, B.N Singh   +4 more
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Crystallography of dislocations and dislocation loops in deformed iron

Philosophical Magazine, 1964
Abstract Crystallographic analyses of dislocations and dislocation loops in deformed b.c.c. iron observed in the electron microscope have been carried out by applying the electron diffraction theory of contrast at dislocations. Dislocations in deformed iron are in the form of tangles, with interspersed clusters of dislocation loops, from the very first
S. M. Ohr, D. N. Beshers
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Continuous distribution of dislocation loops

Czechoslovak Journal of Physics, 1962
Formulae are derived for the displacement and stress in an unbounded continuous isotropic medium when the dislocation loops are continuously distributed. The physical interpretation of the tensor introduced for the dislocation loop density in the crystal is discussed and the relation to the theory of the continuous distribution of dislocations is ...
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The spacing of prismatic dislocation loops

Philosophical Magazine, 1960
Abstract The stresses round a circular prismatic dislocation loop are determined and used to calculate the spacings between such loops in a row generated from a source of internal stress. The results are consistent with the available experimental observations.
R. Bullough, R. C. Newman
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The long-range forces between dislocation loops and dislocations

The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics, 1964
The long-range elastic interactions between dislocations and loops, both prismatic and shear, have been calculated for an isotropic medium.
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Long-range elastic interaction between dislocations and dislocation loops

The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics, 1966
The long-range elastic interaction between dislocation loops and dislocations in cubic lattices is studied, using anisotropic elasticity.
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Dislocation loop punching in bubble arrays

Philosophical Magazine A, 1989
Abstract High densities of inert gas bubbles can be produced in metals by ion implantation or nuclear transmutations. At low temperatures, these bubbles grow by repeated emission of prismatic dislocation loops. An analysis is presented for loop punching considering the effects of the stress fields between bubbles and the presence of retained loops.
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Sources, resolution and physiological relevance of R-loops and RNA–DNA hybrids

Nature Reviews Molecular Cell Biology, 2022
Eva Petermann, Li Lan, Lee Zou
exaly  

VACANCIES AND DISLOCATION LOOPS IN GRAPHITE

Applied Physics Letters, 1962
Electron microscope studies were undertaken to determine concentrations and mobilities of vacancies in graphite. Crystals were quenched and annealed to various temperatures. Crystals under strain (some deliberately bent) before heat treatment contained larger numbers of loops while crystals treated under strain- free conditions showed no loops ...
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