Searches , social queries for DIFFUSION CREEP
Search references for DIFFUSION CREEP. Phrases containing DIFFUSION CREEP
See searches and references containing DIFFUSION CREEP!
Search references for DIFFUSION CREEP. Phrases containing DIFFUSION CREEP
See searches and references containing DIFFUSION CREEP!DIFFUSION CREEP
Diffusion creep refers to the deformation of crystalline solids by the diffusion of vacancies through their crystal lattice. Diffusion creep results in
Diffusion_creep
Property of solid materials under mechanical stress
mechanisms are: Bulk diffusion (Nabarro–Herring creep) Grain boundary diffusion (Coble creep) Glide-controlled dislocation creep: dislocations move via
Creep_(deformation)
Mechanism of crystalline solid deformation
science, Coble creep, a form of diffusion creep, is a mechanism for deformation of crystalline solids. Contrasted with other diffusional creep mechanisms
Coble_creep
Deformation mechanism in crystalline materials
lattice of the material, in contrast to diffusion creep, in which diffusion (of vacancies) is the dominant creep mechanism. It causes plastic deformation
Dislocation_creep
Topics referred to by the same term
permanently under the influence of stresses Coble creep Diffusion creep Dislocation creep Nabarro–Herring creep Creep, the advancing of a railway wheel more or
Creep
Material deformation mechanism
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
Grain_boundary_sliding
Gradual movement of the planet's mantle
upper mantle, a variety of creep processes can occur, with dislocation creep dominating in the lower mantle and diffusional creep occasionally dominating
Mantle_convection
Metamorphic rock
In crustal rocks the most important processes are dislocation creep and diffusion creep. Dislocation generation acts to increase the internal energy of
Mylonite
Test procedure to determine mechanical properties of a specimen
equations governing different mechanisms of creep, such as power law creep or diffusion creep (see creep for more information). Further analysis can be
Tensile_testing
Microscopic processes responsible for changes in a material's structure, shape and volume
mass transfer are Nabarro-Herring creep, Coble creep, and pressure solution. Nabarro–herring creep, or volume diffusion, acts at high homologous temperatures
Deformation_mechanism
Material deformation mechanism
Herring who discussed the phenomenon in 1950. This type of creep results from the diffusion of vacancies from regions of high chemical potential at grain
Nabarro–Herring_creep
Alloy with higher durability than normal metals
𝛾'-phase. Diffusion is also a method of creep, and there are a few ways to limit diffusional creep. One primary way that superalloys can limit diffusional creep
Superalloy
Slow, downward progression of rock and soil down a low grade slope
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
Downhill_creep
Nickel-based superalloy
inhibiting grain boundary sliding, a process required for low temperature diffusional creep. Unlike many other Ni-based superalloys, the M23C6 carbide is not
Inconel_718
Long-term deformation of concrete due to drying shrinkage and mechanical stress
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)
Creep and shrinkage of concrete
Creep_and_shrinkage_of_concrete
Heat treatment technique used to increase the yield strength of malleable materials
Another useful effect can be to impede grain-boundary sliding under diffusional creep conditions with very fine precipitates and if the precipitates are
Precipitation_hardening
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
Damage_mechanics
Fuel cell that produces electricity by oxidization
As a result, diffusion creep must also be considered. ϵ˙eqcreep=k~0DTσeqmdgrainn Where: ϵ˙eqcreep = equivalent creep strain D = Diffusion coefficient T
Solid_oxide_fuel_cell
Structural discontinuity surface in the Earth's crust and upper mantle
(on a grain scale) have to be taken into account: diffusion creep (various types). dislocation creep (various types). dynamic recrystallization pressure
Shear_zone
Solid-state welding technique
Diffusion bonding or diffusion welding is a solid-state welding technique used in metalworking, capable of joining similar and dissimilar metals. It operates
Diffusion_bonding
Alloy
assumed that the activation energy of diffusion for creep is close to that for the activation energy for diffusion of Hf within Nb. While there is no explicit
Niobium_alloy
Type of polycrystalline material
fraction of grain boundaries allows for a significant diffusional flow of atoms via Coble creep, analogous to the grain boundary sliding deformation mechanism
Nanocrystalline_material
grains are sufficiently small, which converts the creep mechanism from dislocation creep to diffusion creep, thus the grains start to grow. Therefore, the
Paleostress_inversion
Crystallographic defect; an atom missing from a lattice site
rises exponentially. Vacancy-mediated diffusion governs many processes in materials science, including sintering, creep, and phase transformations. For example
Vacancy_defect
American geophysicist
dynamics of the partially molten upper mantle: Deformation in the diffusion creep regime". Journal of Geophysical Research: Solid Earth. 100 (B2): 1981–2001
Greg_Hirth
crystal-plastic deformation include pressure solution, dislocation creep, and diffusion creep. In addition to rocks, biological materials such as wood, lumber
Ductility_(Earth_science)
eventually metallic softening. Nanocrystalline creep is considered to follow the Coble creep mechanism, the diffusion of atoms along grain boundaries at low stress
Microstructurally stable nanocrystalline alloys
Microstructurally_stable_nanocrystalline_alloys
Interface between crystallites in a polycrystalline material
Raj, R.; Ashby, M. F. (April 1971). "On grain boundary sliding and diffusional creep". Metallurgical Transactions. 2 (4): 1113–1127. Bibcode:1971MT...
Grain_boundary
Fraction of the melting point
steady state creep (diffusion-dependent deformation). A higher homologous temperature results in an exponentially higher rate of diffusion dependent deformation
Homologous_temperature
Formula for temperature dependence of rates of chemical reactions
used to model the temperature variation of diffusion coefficients, population of crystal vacancies, creep rates, and many other thermally induced processes
Arrhenius_equation
Metal alloy with copper as its principal component
slow down creep deformation, and the various mechanisms that contribute to it such as dislocation glide, dislocation glide, and vacancy diffusion. Some examples
List_of_copper_alloys
South African solid-state physicist
root of the grain size. He predicted the existence and magnitude of diffusional creep and improved Rudolf Peierls' estimate of the stress required to move
Frank_Nabarro
Austenitic nickel-chromium superalloys
using the diffusion of vacancies to bypass hardening precipitates, resulting in continuous and slow deformation. Stress dependence: The creep rate in Inconel
Inconel
Process by which soils decrease in volume
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
Soil_consolidation
rearrangement slows, diffusive mechanisms, analogous to those present in diffusional creep, become dominant and change the sizes and shapes of powder particles
Liquid_phase_sintering
Marine geologist
that olivine deforms via dislocation creep at depths above 250 km in the upper mantle, and via diffusion creep at deeper depths. This was believed to
Andréa_Tommasi
Heat- and wear-resistant metals
due to their high melting points, refractory metals are stable against creep deformation to very high temperatures. Most definitions of the term "refractory
Refractory_metals
Electric light bulb with a resistively heated wire filament
accommodated by diffusional creep. During operation, the tungsten wire is stressed under the load of its own weight and because of the diffusion that can occur
Incandescent_light_bulb
Property of materials with both viscous and elastic characteristics under deformation
stress ε(t) is strain Einst,creep and Einst,relax are instantaneous elastic moduli for creep and relaxation K(t) is the creep function F(t) is the relaxation
Viscoelasticity
University professor
include: On grain boundary sliding and diffusional creep Intergranular Fracture at Elevated Temperature. Creep in polycrystalline aggregates by matter
Rishi_Raj
One of the five families of stainless steel
of dislocations via diffusion. Above temperatures of approximately 480 °C (753 K), deformation becomes plastic as power-law creep occurs, with glide becoming
Austenitic_stainless_steel
Embrittlement caused by diffusion of metal in a base metal
Metal-induced embrittlement (MIE) is the embrittlement caused by diffusion of metal, either solid or liquid, into the base material. Metal induced embrittlement
Metal-induced_embrittlement
Method for estimating the age of a planet's surface
Shallow surface mechanism such as aeolian deposition, erosion, and diffusional creep can also alter crater morphology, making the surface appear younger
Crater_counting
American geologist
brittle fracturing to cataclastic flow to dislocation creep and melt or fluid-enhanced diffusion creep. These experiments investigated the role of phase distribution
Jan_Tullis
Equation describing the flow of a fluid through a porous medium
conduction, Ohm's law in the field of electrical networks, and Fick's law in diffusion theory. Since the 1830s, French hydraulic engineer Henry Darcy studied
Darcy's_law
Zircaloy family
Harper-Dorn creep, dominated by grain boundary diffusion. As stress increases, the stress exponent increases to ~6, which would be in the power-law creep, dominated
Zirconium_alloys
Equations of motion for viscous fluids
taking only kinematic viscosity as a parameter. Note that the equation for creeping flow results when the left side is assumed zero. In axisymmetric flow another
Navier–Stokes_equations
Reduction in ductility of a metal exposed to hydrogen
methods like In situ eddy current and ultrasonic monitoring of hydrogen diffusion is also reported Recent studies have shown that hydrogen-assisted degradation
Hydrogen_embrittlement
Degradation of solder due to deformation under cyclic loading
causes the solder joints to experience non-recoverable deformation via creep and plasticity that accumulates and leads to degradation and eventual fracture
Solder_fatigue
Czech-American civil engineer (born 1937)
prediction models for concrete creep and shrinkage became RILEM Standard Recommendation in 1995 and 2015. His nonlinear diffusion model for moisture in concrete
Zdeněk_P._Bažant
1962 A Dialogue for This Decade: Sterling McMurrin B&W 20m June 5, 1962 Diffusion and Osmosis Stanley Croner (producer); Charles F. Finance color 14m August
List of Encyclopædia Britannica Films titles
List_of_Encyclopædia_Britannica_Films_titles
Manufacturing process
and microporosity through a combination of plastic deformation, creep, and diffusion bonding; this process improves fatigue resistance of the component
Hot_isostatic_pressing
Nuclear power plant component
at elevated temperatures, because diffusion and dislocation motion occur more rapidly. Irradiation can cause creep due to the interaction between stress
Reactor_pressure_vessel
Type of continuous-flow turbine engine
can be added in solid solution to improve creep strength. The addition of these elements reduces the diffusion of the gamma prime phase, thus preserving
Gas-turbine_engine
Type of fluid flow
Stokes flow (named after George Gabriel Stokes), also named creeping flow or creeping motion, is a type of fluid flow where advective inertial forces
Stokes_flow
Gene or genetic material that has been transferred from one organism to another
transgene from Brassica napus into the wild form gene pool. Transgenic creeping bentgrass, engineered to be glyphosate-tolerant as "one of the first wind-pollinated
Transgene
Mixture with a lower melting point than its constituents
eutectic by the application of ultrasonic energy to the chip. Brazing, where diffusion can remove alloying elements from the joint, so that eutectic melting
Eutectic_system
Resilient and smooth elastic tissue present in animals
confined compression test, which can be used in either a 'creep' or 'relaxation' mode. In creep mode, the tissue displacement is measured as a function
Cartilage
Log burnt on a hearth as a Christmas tradition
Black Friday (partying) Black Friday (shopping) Christmas club Christmas creep Christmas Day (Trading) Act 2004 Christmas jumpers Christmas Lectures Christmasland
Yule_log
Aerofoil; individual component of a turbine disc
per minute (RPM)) and fluid forces that can cause fracture, yielding, or creep failures. Additionally, the first stage (the stage directly following the
Turbine_blade
Battery with solid electrodes and a solid electrolyte
and a low activation energy for self-diffusion of 50 kJ/mol, indicating its high propensity to significantly creep at room temperature. It has been shown
Solid-state_battery
Metal-joining technique
g. a carbide tip and a steel holder), and to act as a diffusion barrier (e.g. to stop diffusion of aluminum from aluminum bronze to steel when brazing
Brazing
Effects of ionizing radiation
swelling that occurs as a result of the creep and dislocation motion. They also act to help prevent diffusion, which restricts the ability of the material
Radiation_damage
Growth of cracks in a corrosive environment
between the glass and water. In region II, crack propagation velocity is diffusion controlled and dependent on the rate at which chemical reactants can be
Stress_corrosion_cracking
Engine that uses steam to perform mechanical work
turbine entry temperatures are typically 565 °C (1,049 °F; 838 K) (the creep limit of stainless steel) and condenser temperatures are around 30 °C (86 °F;
Steam_engine
Resistance of a fluid to shear deformation
Naoichi; Sasajima, Sadao; Ito, Hidebumi (15 February 1978). "Long-term Creep of Rocks: Results with Large Specimens Obtained in about 20 Years and Those
Viscosity
British computer scientist
Letters (World Scientific, 2017–). He appears in the 2014 documentary The Creeping Garden and in the 2019 documentary Le Blob. Adamatzky is also the author
Andrew_Adamatzky
Alleged extra-terrestrial beings
collaboration with the artist David Baker will find a "frisson" of "déjà vu" creeping up his spine when seeing this episode. The resemblance is much abetted
Grey_alien
American experimental rock and mineral physicist
University of Illinois at Urbana-Champaign in 1970, for a thesis on the diffusion of carbon in titanium carbide (TiC). He spent a year at the Cavendish
David_Kohlstedt
Aspects of fluid mechanics involving fluid flow
inertial forces are sometimes neglected; this flow regime is called Stokes or creeping flow. In contrast, high Reynolds numbers (Re ≫ 1) indicate that the inertial
Fluid_dynamics
Layer of silicate rock
the crystalline rocks at high pressure and temperature to undergo slow, creeping, viscous-like deformation over millions of years, there is a convective
Earth's_mantle
Technique to solve partial differential equations
problems in mathematical physics, such as conservative laws, diffusion process, advection-diffusion systems, and kinetic equations. Given noisy measurements
Physics-informed neural networks
Physics-informed_neural_networks
Branch of mathematical analysis
Sverre (2016-09-23). "Linking the fractional derivative and the Lomnitz creep law to non-Newtonian time-varying viscosity". Physical Review E. 94 (3)
Fractional_calculus
are called quasi-static, and in this case, anelastic materials exhibit creep, elastic aftereffect, and stress relaxation. In these experiments a stress
Anelasticity
Fluid flow that occurs due to heterogeneous fluid properties and body forces
develops depends on the relative effects of buoyancy, viscosity, and diffusion. These are commonly described using dimensionless quantities such as the
Convection
Form of exhaust heat management
oxygen, so that further growth is controlled by diffusion of metal from the bond-coat rather than the diffusion of oxygen from the top-coat. The TBC can also
Thermal_barrier_coating
Mythical female creature
and follows his wife to her celestial realm. Once there, he is advised to creep into her hut and play with his child on their cradle to draw the mother's
Swan_maiden
Ionizing radiation that presents as free neutrons
effects of these mechanisms include irradiation hardening, embrittlement, creep, and environmentally-assisted cracking. The defect clusters, dislocation
Neutron_radiation
Synthetic polymer
inertness. Therefore, it has no "memory" and is subject to creep. Because of the propensity to creep, the long-term performance of such seals is worse than
Polytetrafluoroethylene
Process in marketing
instability of segments over time and structural change which leads to segment creep and membership migration as individuals move from one segment to another
Market_segmentation
Small crystal which forms under certain conditions
boundary migration plays an important role in many of the mechanisms of creep. Grain boundary migration occurs when a shear stress acts on the grain boundary
Crystallite
Enrichment of atoms, ions, and molecules
can lead to grain boundary fracture as a result of temper brittleness, creep embrittlement, stress relief cracking of weldments, hydrogen embrittlement
Segregation (materials science)
Segregation_(materials_science)
2019 Brazilian political scandal
Moro released a statement condemning “the distorted and sensationalist diffusion of supposed messages obtained by criminal means”. The Intercept and the
Vaza_Jato
Interdisciplinary branch of biology and engineering
that analysis cannot easily do. In addition to devices that oscillate, creep, and play tic-tac-toe, synthetic biology has produced diagnostic instruments
Synthetic_biology
Growth of an oxide layer on a metal at high temperature
performance in other properties, such as mechanical properties (strength, creep resistance), fabricability (formability, weldability), cost, etc. Material
Scaling_(metallurgy)
Technique used to study & characterize materials
sample is less likely to be destroyed and longer relaxation times/ longer creep studies can be done with much more ease. Characterizing low viscous materials
Dynamic_mechanical_analysis
used to model the temperature variation of diffusion coefficients, population of crystal vacancies, creep rates, and many other thermally-induced processes/reactions
Glossary_of_engineering:_A–L
Non-reversible deformation of a solid material in response to applied forces
and Coble diffusional flow through the lattice and along the single crystal surfaces, respectively, as well as dislocation climb-glide creep. During the
Plasticity_(physics)
Composite material
The oxide particles instead are stable in the matrix, which helps prevent creep. Particle stability implies little dimensional change, embrittlement, effects
Oxide dispersion-strengthened alloy
Oxide_dispersion-strengthened_alloy
Land branch of the armed forces of the Byzantine Empire
quality and prestige of the ordinary, non-elite Byzantine infantry. A creeping Feudalism that helped to erode centralized administration. Increasing emulation
Byzantine_army
Study of the deformation of bodies in the presence of frictional effects
Carter (1926) and H. Fromm (1927). They independently presented the creep versus creep force relation for a cylinder on a plane or for two cylinders in steady
Frictional_contact_mechanics
Machine that uses steam to rotate a shaft
these elements reduces the diffusion of the gamma prime phase, thus preserving the fatigue resistance, strength, and creep resistance. Turbine types include
Steam_turbine
Main parameter determining concrete strength and durability
the long term, a concrete mix with too much water will experience more creep and drying shrinkage as excess water leaves the concrete porosity, resulting
Water–cement_ratio
Type of material
and twins in both crystalline and non-crystalline metals. Internal slip, creep, and metal fatigue may also ensue. The atoms of simple metallic substances
Metal
American geoscientist
chemo-mechanical pressure solution processes in salt rock contributing to salt creep. 2019 – Fellow, American Geophysical Union (AGU) 2020 – Director's Award
Carl_Steefel
Ratio of inertial to viscous forces acting on a liquid
fluid mechanics. The Reynolds number measures the ratio of advection and diffusion effects on structures in the velocity field, and is therefore closely
Reynolds_number
899 Plastics — Determination of creep behaviour ISO 899-1:2017 Part 1: Tensile creep ISO 899-2:2003 Part 2: Flexural creep by three-point loading ISO 900:1977
List_of_ISO_standards_1–1999
Policy capturing Political forecasting Pollaczek–Khinchine formula Pollyanna Creep Polykay Poly-Weibull distribution Polychoric correlation Polynomial and
List_of_statistics_articles
Flow where fluid particles follow smooth paths in layers
surface. Laminar flow is a flow regime characterized by high momentum diffusion and low momentum convection. When a fluid is flowing through a closed
Laminar_flow
Alloys with high proportions of several metals
boundary diffusion, presence of oxide, etc. The high concentrations of multiple elements leads to slow diffusion. The activation energy for diffusion was found
High-entropy_alloy
travel, tourism, insurance
DIFFUSION CREEP
DIFFUSION CREEP
DIFFUSION CREEP
DIFFUSION CREEP
DIFFUSION CREEP
DIFFUSION CREEP
DIFFUSION CREEP
DIFFUSION CREEP
DIFFUSION CREEP
travel, tourism, insurance