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A dislocation is a linear crystallographic defect or irregularity within a crystal structure which contains an abrupt change in the arrangement of atoms. The crystalline order is restored on either side of a dislocation but the atoms on one side have moved or slipped.
Dislocations are line defects in crystals, generally categorized as edge and screw. In the former, the dislocation line is defined along the edge of an extra half-plane of atoms, forming a localized lattice distortion.
1 sty 2024 · The dislocation line is the boundary line between the area that experiences relative displacement on both sides of a geometric surface in the crystal and the other areas that do not experience relative displacement. It forms a closed loop line in the crystal or terminates at crystal surface.
Cut into the lattice with a fictitious "Volterra" knife (make a plane cut to keep it easy), The cut line is a closed loop by necessity. The part of the cut line inside the crystal identifies the dislocation line.
In three dimensions, the nature of a dislocation as a line defect becomes apparent. The dislocation line runs along the core of the dislocation, where the distortion with respect to the perfect lattice is greatest. There are two types of three-dimensional dislocation.
Dislocations are line defects, extending through a crystal for some distance along a dislocation line. The Burgers vector specifies the magnitude and direction of the atomic movements that occur as the dislocation moves through the lattice.
24 sie 2023 · In three dimensions, the nature of a dislocation as a line defect becomes apparent. The dislocation line runs along the core of the dislocation, where the distortion with respect to the perfect lattice is greatest. There are two types of three-dimensional dislocation.
