Abstract

A simplified form of Khachaturlan′s solution to the problem of determining the strain energl of an arbitrarill-shaped coherent inclusion is found for the case of a disk-shaped inclusion. Specific strain energies are calculated as a function of the orientation of such an inclusion in lattices possessing various elastic properties. Some numerical results are presented. The salient features of the specific strain energl surface are found to depend onll on the elastic properties of the lattice. From this, a relationship betleen an elastic anisotropl parameter, A, and the minimum strain energl orientation of a disk-shaped inclusion is observed. The strain energies of GP lones in Al-Cu and Cu-Be age hardening allols are calculated. The minimum strain energl orientations of GP lones in these allols agree lith experimentalll observed orientations.

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