Abstract
Elastic interaction between extended screw dislocations and tetragonal defects of the 〈111〉 type was studied by computing the energy-distance and the force-distance profiles for several metals using anistropic elasticity theory. The isotropic values of interaction energy and force as the limiting cases of the anistropic values were also obtained. It is shown that both the width of the dislocation and the anisotropy of the crystal significantly affect the energy-distance and the force-distance profiles. From the results obtained, the maximum interaction energy and the hardening coefficients for defect-dislocation interaction were also calculated. These values are compared with experimentally observed hardening in metals.
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