Generation of a Screw Dislocation Network in a Small Angle Twist Boundary

This is a famous drawing (probably coming from Read) that can be found in just about any book on dislocations.
It shows the direct superposition of two twisted cubic lattices on the left, and the formation of a screw dislocation network with perfect (= S1) areas in between.
 
 
 

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go to 7.2.2 Case Studies: Small Angle Grain Boundaries in Silicon I

© H. Föll (Defects - Script)