Geometrically necessary dislocations are like-signed dislocations needed to accommodate for plastic bending in a crystalline material.[1] They are present when a material's plastic deformation is accompanied by internal plastic strain gradients.[2] They are in contrast to statistically stored dislocations, with statistics of equal positive and negative signs, which arise during plastic flow from multiplication processes like the Frank-Read source.
^D., Nix, William; Society., Materials Research (2016-09-15). Imperfections in crystalline solids. ISBN 9781107123137. OCLC 927400734.{{cite book}}: CS1 maint: multiple names: authors list (link)
^H., Courtney, Thomas (2005). Mechanical behavior of materials. Waveland Press. ISBN 978-1577664253. OCLC 894800884.{{cite book}}: CS1 maint: multiple names: authors list (link)
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Geometricallynecessarydislocations are like-signed dislocations needed to accommodate for plastic bending in a crystalline material. They are present...
sessile dislocations which are immobile and glissile dislocations which are mobile. Examples of sessile dislocations are the stair-rod dislocation and the...
stored dislocations (SSD) which are created by homogeneous strain and are dependent upon the material and processing conditions. Geometricallynecessary dislocations...
EBSD can also provide information about the density of geometricallynecessarydislocations (GNDs). However, the lattice distortion is measured relative...
in Cameroon Gabriel Nadeau-Dubois, a politician in Quebec Geometricallynecessarydislocations This disambiguation page lists articles associated with the...
concentration will activate dislocation motion in the available glide planes. These dislocations are geometricallynecessary to ensure that the strain in...
partial dislocations. The vector sum of the Burgers vectors of the partial dislocations is the Burgers vector of the extended dislocation. A dislocation will...
with small indents, requiring “geometricallynecessarydislocations”. Another suggestion is that there may be no dislocations in the region being deformed...
T. B. Britton, A. J. Wilkinson. 2012. Stress fields and geometricallynecessarydislocation density distributions near the head of a blocked slip band...
diffraction in a scanning electron microscope to quantify geometricallynecessarydislocation density at the nanoscale". Ultramicroscopy. 197: 39–45. doi:10...
the indentation size effect through the measurement of the geometricallynecessarydislocations beneath small indents of different depths using EBSD tomography"...
in the late 1960s. Dislocations in a crystal lattice are line defects that are associated with local stress fields. Dislocations allow shear at lower...
AJ, Randman D. Determination of elastic strain fields and geometricallynecessarydislocation distributions near nanoindents using electron back scatter...
2022-10-03 Anderson, PM; Hirth, JP; Lothe, J. Theory of Straight Dislocations. Theory of dislocations. Wikimedia Commons has media related to Slip bands in metals...
more motion of dislocations when a stress is applied to the material. Thus, in materials with a lower amount of slip systems, dislocations are often pinned...
obtain narrow, well-resolved images of dislocations, and to separate single dislocations even when the dislocation density in a material is rather high...
extra atom squeezed in where it does not fit), and dislocations (see figure at right). Dislocations are especially important in materials science, because...
family of dislocations are likely to decompose into partial dislocations in this alloy due to its low stacking fault energy, such as dislocations with burgers...
plasticity analysis of micro-deformation, lattice rotation and geometricallynecessarydislocation density". Proceedings of the Royal Society A: Mathematical...
nucleation. The reason for such rapid growth is that real crystals contain dislocations and other defects, which act as a catalyst for the addition of particles...
Röntgendiagnose von Schulterluxationen" [For X-ray diagnosis of shoulder dislocations]. Chirurg (in German). 5: 702. Henry R Guly. "Foot Injuries". Royal College...
microscopic imperfections found in the material. These defects namely dislocations, crystalline boundaries, amorphous interlayers and block structure can...
Natural crystalline materials contain imperfections: impurity ions, stress dislocations, and other phenomena that disturb the regularity of the electric field...
hospitalization unless tongue swelling is severe. Good oral hygiene is necessary, including thorough tooth brushing at least twice a day, and flossing...
polycrystalline metals and alloys usually deform via shear caused by dislocations, twins, and / or shear bands. This leads to pronounced plastic anisotropy...
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