Question

An ensemble of edge dislocations present in a bulk specimen of mass 'M has a total length of 'L.' The physical density of the material is 'r'. All the dislocations are present in parallel slip planes and they have Burgers vector of b. However, it is noted that only 30% of the dislocations are sessile in nature and the rest are mobile. a) What would be the shear strain rate if the mobile (5) b) To create a shear strain of 'g', how much time should dislocations move at an average velocity of'V"? elapse from the start of the dislocation movement? (2) (Hint: Use Orowan's equation.)

Answer 1

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