Answer -
dislocation slip system -
Slip occurs by the passage of dislocations on close packed planes which are planes containing the greatest number of atoms per area and in close-packed directions (most atoms per length). Close-packed planes are known as slip or glide planes. .
The magnitude and direction of slip are represented by the Burgers vector.
Face centered cubic crystals -
Slip in face centered cubic (fcc) crystals occurs along the close packed plane. Specifically, the slip plane is of type {111}, and the direction is of type <110>. In the diagram on the right, the specific plane and direction are (111) and [110], respectively.
Given the permutations of the slip plane types and direction types, fcc crystals have 12 slip systems. In the fcc lattice, the of the Burgers vector, b, can be calculated using the following equation:
Where a is the lattice constant of the unit cell.
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