Elastic-plastic transition in copper crystals as determined by an etch-pit technique
Copper (99.999%) crystals with a dislocation density of 50/mm2 were prepared. These crystals were stressed by applying a pure bending moment, and they were etched with a dislocation etch either before and after or while the stress was applied. The motion of dislocations was determined by observing the size and nature of the dislocation etch pits. The resoIved stress necessary to move grown-in dislocations was about 4 g/mm2. Examples of dislocation motion under stress, then return motion when the stress was removed, and of multiple motion under stress were observed. Multiplication of dislocations occurred at a resolved stress of about 18 g/mm2. The observed phenonnena are discussed in terms of simple dislocation theory.
- Research Organization:
- Oak Ridge National Lab., Tenn.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-002228
- OSTI ID:
- 4833104
- Journal Information:
- Journal of Applied Physics (U.S.), Journal Name: Journal of Applied Physics (U.S.) Vol. Vol: 32; ISSN JAPIA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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