Frank-Read source

Frank-Read source

[¦fräŋk ¦rēd ‚sȯrs]
(metallurgy)
The creation of dislocations by application of shear stress to an edge dislocation anchored terminally, causing formation of an unstable loop form followed by formation of a closed dislocation line and the establishment of the original condition.
One of the sources of dislocations in a plastically deforming metal.