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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.

	Aims Before you start Introduction Dislocations in 2D Bubble raft Dislocation motion Dislocation glide Dislocations in 3D Observing dislocations Summary Questions Going further

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