Orientational effect of the dynamical interaction of circular dislocation loops with a moving edge dislocation

This work is aimed for justification of quantitative effect of radiation defect concentration decreasing in materials depending on density of edge dislocation which are their outlet. The results of defect kinetics modeling with taking into account their recombination on dislocation loops, edge dislocations and pores are given. The summery of this work is useful in the frame of solving problem of decreasing radiation swelling and material properties degradation during neutron irradiation.

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Simulation of the interaction between an edge dislocation and ⟨111⟩ interstitial dislocation loops in α-iron

Radiation Effects and Defects in Solids ◽

10.1080/10420150.2018.1564922 ◽

2019 ◽

Vol 174 (3-4) ◽

pp. 329-338 ◽

Cited By ~ 1

Author(s):

Panagiotis Grammatikopoulos ◽

David J. Bacon ◽

Yuri N. Osetsky

Keyword(s):

Edge Dislocation ◽

Dislocation Loops

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Electron microscope image contrast from small dislocation loops. I. Theoretical predictions for edge dislocation loops in a BCC crystal

Journal of Physics F Metal Physics ◽

10.1088/0305-4608/7/8/006 ◽

1977 ◽

Vol 7 (8) ◽

pp. 1359-1369 ◽

Cited By ~ 30

Author(s):

B L Eyre ◽

R C Perrin ◽

D M Maher

Keyword(s):

Electron Microscope ◽

Edge Dislocation ◽

Image Contrast ◽

Dislocation Loops ◽

Microscope Image ◽

Theoretical Predictions ◽

Electron Microscope Image

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X-ray topographic study of dislocation around indents on {111} surfaces of indium antimonide

Journal of Applied Crystallography ◽

10.1107/s002188988708614x ◽

1987 ◽

Vol 20 (6) ◽

pp. 499-504 ◽

Cited By ~ 7

Author(s):

M. R. Surowiec ◽

B. K. Tanner

Keyword(s):

Edge Dislocation ◽

Indium Antimonide ◽

Direct Evidence ◽

Dislocation Loops ◽

X Ray ◽

Plane Parallel ◽

Extended Dislocation

The dislocation configurations around microindentations on {111} surfaces of InSb have been studied by transmission X-ray topography. In all cases, glide on the B-type {111} planes only occurs. The most extended dislocation loops occur around A-surface indents. Glide occurs on inclined {111} planes and the loops have extended screw segments parallel to the surface. Around B-surface indents dislocations glide predominantly on the ({\bar 1} {\bar 1} {\bar 1}) plane parallel to the surface. The mobility of these dislocations is about two or three times less than the former type. Direct evidence for the formation of edge dislocation barriers from reactions between dislocations gliding in the ({\bar 1} {\bar 1} {\bar 1}) plane is presented.

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Application of Modified Bloch Waves to Image Analysis of Extended Linear Defects

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010005202x ◽

1974 ◽

Vol 32 ◽

pp. 402-403

Author(s):

S. Nakahara ◽

D. M. Maher

Keyword(s):

Image Analysis ◽

Computational Approach ◽

Dislocation Loops ◽

Plane Wave Expansion ◽

Dynamical Equations ◽

Bloch Waves ◽

Linear Defects ◽

Imperfect Crystal ◽

Localized Defects ◽

Defective Crystals

Since Head first demonstrated the advantages of computer displayed theoretical intensities from defective crystals, computer display techniques have become important in image analysis. However the computational methods employed resort largely to numerical integration of the dynamical equations of electron diffraction. As a consequence, the interpretation of the results in terms of the defect displacement field and diffracting variables is difficult to follow in detail. In contrast to this type of computational approach which is based on a plane-wave expansion of the excited waves within the crystal (i.e. Darwin representation ), Wilkens assumed scattering of modified Bloch waves by an imperfect crystal. For localized defects, the wave amplitudes can be described analytically and this formulation has been used successfully to predict the black-white symmetry of images arising from small dislocation loops.

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