Screw Dislocation Formation due to Shear Stress
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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.




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