Strain energy of a disk-shaped GP zone
A simplified form of Khachaturyan's solution to the problem of determining the strain energy of an arbitrarily-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 energy surface are found to depend only on the elastic properties of the lattice. From this, a relationship between an elastic anisotropy parameter, A, and the minimum strain energy orientation of a disk-shaped inclusion is observed. The strain energies of GP zones in Al--Cu and Cu--Be age hardening alloys are calculated. The minimum strain energy orientations of GP zones in these alloys agree with experimentally observed orientations.
- Research Organization:
- Univ. of California, Berkeley
- OSTI ID:
- 7330885
- Journal Information:
- Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 24:1; ISSN AMETA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
AGE HARDENING
ALLOYS
ALUMINIUM ALLOYS
ANISOTROPY
BERYLLIUM ALLOYS
COPPER ALLOYS
ELASTICITY
GUINIER-PRESTON ZONES
HARDENING
INCLUSIONS
LATTICE PARAMETERS
MECHANICAL PROPERTIES
ORIENTATION
STRAINS
TENSILE PROPERTIES
ZONES