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Engineering LibreTexts

21: Dislocation Energetics and Mobility

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www.doitpoms.ac.uk/tlplib/me...ng-2/index.php

Learning Objectives

On completion of this TLP you should:

  • Understand why a dislocation forms and how the dislocation width can be determined using an atomistic model, by minimisation of misfit energy due to in-plane stress and misalignment.
  • Appreciate how the energy changes as a dislocation moves and how the parameters of atomic spacing, Shear modulus and Poisson ratio affect the total misfit energy.
  • Be familiar with the concepts of Peierls stress and lattice resistance and compare theoretical and experimental values. Also understand the difference between the linear elastic analytic solution used by Peierls and the atomistic model.

Before you start


This page titled 21: Dislocation Energetics and Mobility is shared under a CC BY-NC-SA 2.0 license and was authored, remixed, and/or curated by Dissemination of IT for the Promotion of Materials Science (DoITPoMS) via source content that was edited to the style and standards of the LibreTexts platform.

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