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in the manner of figures 8.17b and 8.18b, indicate the location in the vicinity of an edge dislocation at which an interstitial impurity atom would be expected to be situated. now briefly explain in terms of lattice strains why it would be situated at this position.

Respuesta :

It will be in the position because there will be a net reduction in lattice strain energy when the lattice strains cancel tensile strains that are associated with the edge dislocation

What is a compressive strain?

The deformation in a solid caused by the application of compressive stress is defined as compressive strain in an elastic material. In other words, compressive strain occurs when a body's length decreases due to equal and opposite forces attempting to compress it.

The impurity atom introduces compressive lattice strains. When these lattice strains partially cancel tensile strains associated with the edge dislocation, there will be a net reduction in lattice strain energy; such tensile strains exist just below the bottom of the extra half-plane of atoms (as shown in the below figure).

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