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A dislocation with Burger vector b1 will dissociate into two partial dislocations of burger vector b2 and b3 respectively; b1 -> b2 + b3 b1, b2, b3 are magnitude of burger vectors. So the reaction will occur only if __________

A dislocation with Burger vector b1 will dissociate into two partial dislocations of burger vector b2 and b3 respectively; b1 -> b2 + b3 b1, b2, b3 are magnitude of burger vectors. So the reaction will occur only if __________ Correct Answer b12 > b22 + b32

The criterion for deciding whether or not dissociation will occur is based on the fact that the strain energy of dislocation is proportional to the square of its Burgers vector. Therefore, the dissociation reaction b1 → b2 + b3 will occur when b12 > b22 + b32, but not b12 < b22 + b32.

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