Partial Dislocations and Stacking Fault Energy

Description

There are two basic types of dislocation movement, Glide and Climb. Glide occurs when the dislocation moves in the surface which contains both its line and Burgers vector: a dislocation able to move in this way is glissile. Climb occurs when the dislocation moves out of the glide surface, and thus normal to the Burgers vector. Glide of many dislocations results in slip, which is the most common manifestation of plastic deformation in crystalline solids. In this module the kinds of dislocations will be explained and described mathematically. Then, the Burgers vector will be described and the slip in FCC will be introduced.
After that, the stacking fault and stacking fault energy will be defined and how the latter affects the partial dislocations will be explained. Finally, the screw dislocations will be treated.

What you will learn

- Identify the kinds of dislocations and define the Burgers vector;
- Describe the Slip in closed-packed and stacking fault energy;
- Explain the screw dislocation mechanism.

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