THE DISSOCIATION OF DISLOCATIONS IN THE FACE-CENTERED CUBIC STRUCTURE
A study was made of the dissociation of dislocations on the {111} plane of fcc crystuls. Dislocations in both the (110) and (112) orientations were considered. To determine which dissociations are energetically favorable, the force between the partials in each of the possible splitting reactions was calculated. Results of the calculation are presented for various fcc elements (for each of which the anisotropy factor A is greater than unity) as well as for a series of fictional fcc materials for which A < 1. It was found that all dissociations into a pair of Shockley partials are energetically favorable. Each dissociation resulting in a Shockley partial and a Frank partial is energetically favorable for one of the two classes of fcc materials designated by A < 1, A < 1. The force between the Shockley partial and the Frank partial is always repulsive for one of these two classes of materials and attractive for the other; only in the case of isotropy (A = 1) is the force between the partials zero. For the dissociations that are energetically favorable, the widths of the split dislocations in the various fcc elements were computed. (auth)
- Research Organization:
- Republic Aviation Corp., Farmingdale, N.Y.
- NSA Number:
- NSA-18-002238
- OSTI ID:
- 4154659
- Journal Information:
- Acta Met., Journal Name: Acta Met. Vol. Vol: 11
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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