Basic Modes of Plastic Deformation – Deformation by Slip & Deformation by Twinning

Deformation by Slip Slip is defined as sliding of blocks of crystal over one another along definite crystallographic planes called slip planes. So it is the relative displacement along a definite direction. When slip takes place, one part of the lattice moves with respect to the other. Generally slip plane is the plane of highest atomic density and slip direction is the closest packed direction within the slip plane. This is because the bond between these planes is weakest, so when force is applied in proper direction, relative movement takes place very easily. The shear stress…

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