Accession Number:

AD0731401

Title:

On the Motion of the a/2 <111> Screw Dislocation in Alpha Iron.

Descriptive Note:

Technical rept.,

Corporate Author:

BATTELLE MEMORIAL INST COLUMBUS OHIO COLUMBUS LABS

Personal Author(s):

Report Date:

1971-10-01

Pagination or Media Count:

26.0

Abstract:

The atomic configuration of a microkink along a a2 111 screw dislocation in alpha-iron is described. The core in the kink is 2 to 3 Burgers vectors wide and 4 to 5 Burgers vectors long. The energy of the kink is 0.08 eV and the atomic positions in the core are not very sensitive to the size of the model and to the choice of interatomic force law. It is shown that infinitely long straight dislocations move only under Peierls stresses considerably larger than expected experimentally. Kinked dislocations on the other hand move under more reasonable stresses. Author

Subject Categories:

  • Metallurgy and Metallography
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE