Imperfections in Solids - Dislocations-Linear Defects

5 important questions on Imperfections in Solids - Dislocations-Linear Defects

What is a dislocation?

A linear or one-dimensional defect around which some of the atoms are misaligned.

What is an edge dislocation?

A linear defect that centers on the line that is defined along the end of the extra half-plane of atoms.

What is a screw dislocation?

A linear atomic distortion formed by a shear stress that is applied to produce the distortion.
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What is a Burgers vector?

The magnitude and direction of the lattice distortion associated with a dislocation.

How do all crystalline materials contain some dislocations?

They were introduced during solidification, during plastic deformation or as a consequence of thermal stresses that result from rapid cooling.

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