DoITPoMS

Introduction to dislocations

Dislocations are crucially important in determining the mechanical behaviour of materials. This teaching and learning package provides an introduction to dislocations and their motion through a crystal. A 'bubble raft' model is used to demonstrate some of the features of dislocations and other lattice defects. Some methods for observing real dislocations in materials are examined.

Photograph of a bubble raft

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First created: April 2004. "Going further" updated: January 2008.