Dislocation Intersections and Reactions
· During
work
hardening in crystals, the resolved shear stress acting on all
the slip
systems
increases.
· Once the
resolved shear stress on a second slip system exceeds the critical shear stress,
Frank-Reed
sources on that slip system may become active and dislocations
on the two active systems can then intersect and react, increasing the work
hardening rate.
· These processes
are responsible for the second stage of work hardening in fcc
single crystals
and in bcc crystals
from the onset of work hardening.
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