The Diffusion of Antimony of Alpha Iron.
Abstract
Diffusion coefficients of antimony in alpha iron were determined in the temperature range 700 to 900C using the residual activity method. Specimens were large-grained polycrystals for the higher temperature measurements and single crystals for the lower temperature measurements. The activation energy (reported in calories/mole) is approximately equal to that measured for iron self-diffusion in this same temperature range, although the antimony diffusion coefficients are a factor of ten larger than the iron self-diffusion coefficients. The potential for strongly coupled vacancy-antimony motions is demonstrated, based on the observed enhancement of iron self-diffusion in dilute iron-antimony alloys. Finally, molybdenum is shown to have a negligible effect on the diffusion of antomony in alpha iron. These results are discussed in relation to the phenomenon of temper brittleness in steels. Embrittlement kinetics in iron-antimony alloys are shown to be consistent with an antimony diffusion-controlled segregation mechanism.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1975
- Accession Number
- ADA016133
Entities
People
- Gordon A. Bruggeman
Organizations
- United States Army Research Laboratory