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of a second phase within the lattice of a material creates physical blockades through which a dislocation cannot pass. The result is that the dislocation must bend (which requires greater energy, or a greater stress to be applied) around the precipitates, which inevitably leaves residual dislocation
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atom is by nature a point defect, thus it must create a stress field when placed into a foreign crystallographic position, which could block the passage of a dislocation. However, it is possible that the alloying material is approximately the same size as the atom that is replaced, and thus its
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within a material that disallow traveling dislocations to come into direct contact. Much like two particles of the same electric charge feel a repulsion to one another when brought together, the dislocation is pushed away from the already present stress field.
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in the material act to halt a dislocation's movement, requiring a greater amount of force to be applied to overcome the barrier. This results in an overall
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This schematic shows how a dislocation interacts with solid phase precipitates. The dislocation moves from left to right in each frame.
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presence would not stress the lattice (as occurs in cobalt alloyed nickel). The different atom would, though, have a different
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loops encircling the second phase material and shortens the original dislocation.
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Dislocations require proper lattice ordering to move through a material. At
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Locations in a crystalline material where lattice slippage is halted
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are applied. This movement of dislocations results in the material
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137:is capable of traveling throughout the
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