Diffusion creep refers to the deformation of crystalline solids by the diffusion of vacancies through their crystal lattice.[1] Diffusion creep results in plastic deformation rather than brittle failure of the material.
Diffusion creep is more sensitive to temperature than other deformation mechanisms. It becomes especially relevant at high homologous temperatures (i.e. within about a tenth of its absolute melting temperature). Diffusion creep is caused by the migration of crystalline defects through the lattice of a crystal such that when a crystal is subjected to a greater degree of compression in one direction relative to another, defects migrate to the crystal faces along the direction of compression, causing a net mass transfer that shortens the crystal in the direction of maximum compression. The migration of defects is in part due to vacancies, whose migration is equal to a net mass transport in the opposite direction.
Diffusioncreep refers to the deformation of crystalline solids by the diffusion of vacancies through their crystal lattice. Diffusioncreep results in...
lattice of the material, in contrast to diffusioncreep, in which diffusion (of vacancies) is the dominant creep mechanism. It causes plastic deformation...
Coble creep, a form of diffusioncreep, is a mechanism for deformation of crystalline solids. Contrasted with other diffusionalcreep mechanisms, Coble...
mass transfer are Nabarro-Herring creep, Coble creep, and pressure solution. Nabarro–herring creep, or volume diffusion, acts at high homologous temperatures...
Steady-state creep rate increases with rising λ/h ratios. At high λ and high homologous temperatures, grain boundary sliding is controlled by lattice diffusion (Nabarro-Herring...
equations governing different mechanisms of creep, such as power law creep or diffusioncreep (see creep for more information). Further analysis can be...
upper mantle, a variety of creep processes can occur, with dislocation creep dominating in the lower mantle and diffusionalcreep occasionally dominating...
In crustal rocks the most important processes are dislocation creep and diffusioncreep. Dislocation generation acts to increase the internal energy of...
Downhill creep, also known as soil creep or commonly just creep, is a type of creep characterized by the slow, downward progression of rock and soil down...
𝛾’-phase. Diffusion is also a method of creep, and there are a few ways to limit diffusionalcreep. One primary way that superalloys can limit diffusional creep...
Creep and shrinkage of concrete are two physical properties of concrete. The creep of concrete, which originates from the calcium silicate hydrates (C-S-H)...
power-law creep, the relevant stress is the von Mises stress as this drives the global creep deformation; however, for void-growth by boundary diffusion, the...
fraction of grain boundaries allows for a significant diffusional flow of atoms via Coble creep, analogous to the grain boundary sliding deformation mechanism...
result, diffusioncreep must also be considered. ϵ ˙ e q c r e e p = k ~ 0 D T σ e q m d g r a i n n {\displaystyle {\dot {\epsilon }}_{eq}^{creep}={\frac...
(on a grain scale) have to be taken into account: diffusioncreep (various types). dislocation creep (various types). dynamic recrystallization pressure...
Diffusion bonding or diffusion welding is a solid-state welding technique used in metalworking, capable of joining similar and dissimilar metals. It operates...
steady state creep (diffusion-dependent deformation). A higher homologous temperature results in an exponentially higher rate of diffusion dependent deformation...
Maxwell, Ludwig Boltzmann, and Lord Kelvin researched and experimented with creep and recovery of glasses, metals, and rubbers. Viscoelasticity was further...
rearrangement slows, diffusive mechanisms, analogous to those present in diffusionalcreep, become dominant and change the sizes and shapes of powder particles...
significant creep, whereby the soil changes volume slowly at constant effective stress over a longer time-scale than consolidation due to the diffusion of water...
used to model the temperature variation of diffusion coefficients, population of crystal vacancies, creep rates, and many other thermally induced processes...
grains are sufficiently small, which converts the creep mechanism from dislocation creep to diffusioncreep, thus the grains start to grow. Therefore, the...
Another useful effect can be to impede grain-boundary sliding under diffusionalcreep conditions with very fine precipitates and if the precipitates are...
dynamics of the partially molten upper mantle: Deformation in the diffusioncreep regime". Journal of Geophysical Research: Solid Earth. 100 (B2): 1981–2001...
accommodated by diffusionalcreep. During operation, the tungsten wire is stressed under the load of its own weight and because of the diffusion that can occur...
eventually metallic softening. Nanocrystalline creep is considered to follow the Coble creep mechanism, the diffusion of atoms along grain boundaries at low stress...
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