Practical Electron Microscopy and Database

An Online Book, Second Edition by Dr. Yougui Liao (2006)

Practical Electron Microscopy and Database - An Online Book

Chapter/Index: Introduction | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Appendix

Screw Dislocation Formation due to Shear Stress

When a shear stress (τ) is applied, some plane can slip and a dislocation can be formed. In Figure 3457, the slip of the elements has started on the right-front face of the crystal and then, in the direction of the shear the progressive slip on the slip plane involves the motion of a right-handed screw dislocation.

Schematic illustration of right-handed screw dislocation motion and slip

Figure 3457. Schematic illustration of the motion and slip of right-handed screw dislocations.