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Let´s look at a dislocation loop in cross-section. After the "cut" along the red line, the lower half was moved to the right by b. Two edge dislocatione are visible if we take the cross-section through the middle of the loop. A Burgers circuit would give Burgers vector of different signs - or does it? | |
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From the Voltaterra construction we know that Burgers vector including the sign of must be the same everywhere. But the dislocations shown in the cross section look "reversed" - we would assign different signs just looking at the picture? How is this contradiction to be solved? | |
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Link to the solution | |
Defekte in Kristallen: 5. Versetzungen, 5.1.2 Voltaterra Construction
and Consequences
