Dislocation creep is a deformation mechanism in crystalline materials. Dislocation creep involves the movement of dislocations through the crystal lattice of the material, in contrast to diffusion creep, in which diffusion (of vacancies) is the dominant creep mechanism. It causes plastic deformation of the individual crystals, and thus the material itself.
Dislocation creep is highly sensitive to the differential stress on the material. At low temperatures, it is the dominant deformation mechanism in most crystalline materials.[1] Some of the mechanisms described below are speculative, and either cannot be or have not been verified by experimental microstructural observation.[2]
^Twiss & Moores (2000), p. 396
^Courtney, Thomas H. (2000). Mechanical behavior of materials (2nd ed.). Boston: McGraw Hill. ISBN 0070285942. OCLC 41932585.
Dislocationcreep is a deformation mechanism in crystalline materials. Dislocationcreep involves the movement of dislocations through the crystal lattice...
upper mantle, a variety of creep processes can occur, with dislocationcreep dominating in the lower mantle and diffusional creep occasionally dominating...
levels and higher temperatures than creep mechanisms utilizing dislocation glide. Coble creep occurs through the diffusion of atoms in a material along grain...
In materials science, a dislocation or Taylor's dislocation is a linear crystallographic defect or irregularity within a crystal structure that contains...
In crustal rocks the most important processes are dislocationcreep and diffusion creep. Dislocation generation acts to increase the internal energy of...
Diffusion creep refers to the deformation of crystalline solids by the diffusion of vacancies through their crystal lattice. Diffusion creep results in...
particular purpose in optimizing properties. Creep resistance is dependent, in part, on slowing the speed of dislocation motion within a crystal structure. In...
of the lower mantle suggests that silicate perovskite deforms by a dislocationcreep mechanism. This may help explain the observed seismic anisotropy in...
these same precipitates in the grains might interact with dislocations under creepdislocationcreep conditions. Secondary Precipitates Different precipitates...
creep. Thus, this will lead to about an order magnitude higher strain rate than diffusional creep. Grain boundary sliding accommodated by dislocation...
stress reduction by migration of dislocations in the crystal lattice, known as dislocationcreep. These dislocations concentrate into walls, forming new...
from brittle fracturing to cataclastic flow to dislocationcreep and melt or fluid-enhanced diffusion creep. These experiments investigated the role of phase...
grains are sufficiently small, which converts the creep mechanism from dislocationcreep to diffusion creep, thus the grains start to grow. Therefore, the...
grain scale) have to be taken into account: diffusion creep (various types). dislocationcreep (various types). dynamic recrystallization pressure solution...
sometimes written GlidCop or GLIDCOP. The aluminum oxide particles block dislocationcreep, which retards recrystallization and prevents grain growth; thus preserving...
Creep is generally aided by diffusion and dislocation movement. While there are many ways to test creep, tensile testing is useful for materials such...
factors of late dislocation (after five years) mainly include: Female sex Younger age Previous subluxation without complete dislocation Previous trauma...
alloying element makes plastic deformation more difficult by impeding dislocation motion through stress fields. In contrast, alloying beyond the solubility...
permanent deformations after the application of loads but continue to undergo a creep flow as a function of time under the influence of the applied load. The...
elevated temperatures, because diffusion and dislocation motion occur more rapidly. Irradiation can cause creep due to the interaction between stress and...
This acts to trap the swelling that occurs as a result of the creep and dislocation motion. They also act to help prevent diffusion, which restricts...
homologous temperatures, i.e. when the material is experiencing creep conditions. Moving a dislocation with an associated Cottrell atmosphere introduces viscous...
this plane). Grain boundaries disrupt the motion of dislocations through a material. Dislocation propagation is impeded because of the stress field of...
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