Determine the type of dislocation and the definition based on Figure 2. A. An edge dislocation is created in a crystal by insertion of an extra half plane of the atom and the Burger vector is parallel to the edge dislocation. B. Screw dislocation can be formed in a perfect crystal by applying upward and downward shear stresses to regions of a perfect crystal separated by a cutting plane and the Burger vector is perpendicular to the dislocation line. C. Mixed type of dislocation, within the crystal the dislocation is edge and screw components. D. All the answer is incorrect.

Determine the type of dislocation and the definition based on Figure 2. A. An edge dislocation is created in a crystal by insertion of an extra half plane of the atom and the Burger vector is parallel to the edge dislocation. B. Screw dislocation can be formed in a perfect crystal by applying upward and downward shear stresses to regions of a perfect crystal separated by a cutting plane and the Burger vector is perpendicular to the dislocation line. C. Mixed type of dislocation, within the crystal the dislocation is edge and screw components. D. All the answer is incorrect.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Concept explainers

Crystalline Imperfections

The crystalline imperfections are described as the geometrical defects in the crystal due to incorrect arrangement of atoms, impurity, vacancy, and many more. It is not possible to achieve a perfect or ideal crystal, practically.

Question

Determine the type of dislocation and the definition based on Figure 2.
A. An edge dislocation is created in a crystal by insertion of an extra half plane
of the atom and the Burger vector is parallel to the edge dislocation.
B. Screw dislocation can be formed in a perfect crystal by applying upward
and downward shear stresses to regions of a perfect crystal separated by a
cutting plane and the Burger vector is perpendicular to the dislocation line.
C. Mixed type of dislocation, within the crystal the dislocation is edge and
screw components.
D. All the answer is incorrect.
Shear
Figure 2: Dislocation of metal

Determine the linear density for a hypothetical metal shown in Figure 3 given that the
edge constant, a is 0.316 nm.
А.
3.66
atoms
nm
atoms
4.48
nm
С.
7.31
atoms
nm
atoms
D.
8.95 ·
nm
[1 1 1]
Figure 3: Atoms located in a cubic unit cell direction vector of a hypothetical metal
B.

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