Cottrell atmosphere

E168995

The Cottrell atmosphere is a localized cloud of solute atoms that forms around dislocations in a crystal lattice, reducing their mobility and influencing the material’s mechanical properties.

All labels observed (4)

Label Occurrences
Cottrell atmosphere canonical 1
Cottrell cloud 1
Cottrell–Bilby theory 1

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf crystal defect-related phenomenon
materials science concept
affects plastic deformation behavior
stress–strain curve
alsoKnownAs Cottrell atmosphere
surface form: Cottrell cloud
associatedWith Portevin–Le Chatelier effect
dynamic strain aging
static strain aging
canBeBrokenBy application of sufficient stress
plastic deformation
composedOf solute atoms
dependsOn diffusivity of solute atoms
solute concentration
temperature
field dislocation theory
physical metallurgy
formsAround dislocation
line defect in a crystal lattice
formsDueTo diffusion of solute atoms to dislocations
elastic interaction between solute atoms and dislocation stress field
hasEffectOn dislocation mobility
influences mechanical properties of materials
strain aging behavior
work hardening
yield strength
is example of solute–dislocation interaction
localized cloud of solute atoms
type of point-defect segregation to dislocations
leadsTo Lüders band formation
increase in yield stress
upper and lower yield point behavior
modeledBy Cottrell atmosphere self-linksurface differs
surface form: Cottrell–Bilby theory
namedAfter Alan Cottrell
observedIn interstitial solid solutions
low-carbon steels
substitutional solid solutions
occursIn alloy
crystalline solid
metal
pins dislocation
reduces dislocation mobility
reformsBy diffusion during aging
relatedTo dislocation locking
solute drag
yield point phenomenon
requires mobile solute atoms
stabilizes dislocation

How these facts were elicited

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

Alan Cottrell knownFor Cottrell atmosphere
Alan Cottrell knownFor Cottrell atmosphere
this entity surface form: Cottrell–Stokes law
Cottrell atmosphere alsoKnownAs Cottrell atmosphere
this entity surface form: Cottrell cloud
Cottrell atmosphere modeledBy Cottrell atmosphere self-linksurface differs
this entity surface form: Cottrell–Bilby theory