- A dislocation that lay in the [011] in an fcc crystal and glides on the (1̅11̅) plane. Identify the
three possible Burgers vectors for this dislocation. Each of these three possible dislocations
systems can dissociate into partial dislocations. Identify the dissociation reactions. Note that each
dislocation’s Burgers vector and its associated partial dislocations’ Burgers vectors must be
coplanar, gliding in (1̅11̅) - Consider a straight edge dislocation of length 𝐿 = 5 nm, pinned at the end points, 𝑥 = 0 and 𝑥 = 𝐿. The Burgers vector has magnitude 3 Å and the material’s elastics properties are 𝐺 = 50 GPa and 𝜈 = 0.30. Determine the total energy required to bow the dislocation, within the glide plane, to the shape sin(𝑥 𝜋/𝐿). (For this problem only consider the elastic energy and recognize that the bowed dislocation has a mixture of edge and screw components, i.e., only consider the initial and final states and the elastic energy.
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Possible Burgers vectors for the dislocation
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