Effect of Interstitials on the Trapping of Hydrogen in Iron-Single Crystals
Abstract
A non destructive method of determining the densities of edge and screw dislocations was developed. Using it, thermal elimination of dislocation was shown to be a binary and two stage process for both cold rolled and metallographically polished specimens. The process involves the glide of dislocation dipoles rather than vacancy migration and climb. A method of extracting kinetic information from isochronal runs was developed and tested with isothermal runs. The strong effect of surface dislocations on reducing the diffusion of hydrogen and deuterium in iron single crystals was demonstrated. There is not much of an opening of ions at the core of the dislocations. Therefore positrons probably do not annihilate at the normal sites of the core of the dislocations. The idea that there was insufficient room for a positron to be trapped at a dislocation was based on some approximate calculations carried out while they were associated with Argonne National Lab.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1992
- Accession Number
- ADA246412
Entities
People
- James T. Waber
Organizations
- Michigan Technological University