Dislocation Diffusion in Metallic Materials
Abstract
The goals of this project were: (1) perform a fundamental study of atomic diffusion along dislocation cores in metals and alloys, (2) develop new methods for the calculation of dislocation diffusion coefficients as functions of temperature and chemical composition and (3) calculate diffusion rates along screw, edge and mixed dislocations in Al and Al alloys. To achieve these goals a new interatomic potential for Al-alloy system need to be developed and tested against a large database of experimental and first principles data. Monte carlo and molecular dynamics simulations were performed to determine the atomic mechanisms of dislocation diffusion and their dependence on temperature and alloying. The new methodologies will be applicable to other classes of materials relevant to the Air Force mission.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 08, 2011
- Accession Number
- ADA590192
Entities
People
- Y. Mishin
Organizations
- George Mason University