THE RECRYSTALLIZATION KINETICS OF HIGH PURITY IRON.
Abstract
Measurements have been made of the isothermal recrystallization kinetics of electron beam zone refined iron. The principal impurities in this material were tungsten, carbon, nitrogen, oxygen and hydrogen which together totalled approximately 50 ppm. The results are interpreted in terms of a theory of solute limited grain boundary migration re cently proposed by Cahn (1962). According to this interpretation the boundary velocity at low velocities is determined principally by drag due to the tungsten impurity atoms, while at high velocities it is determined principally by the other four species of impurities. Some evidence tending to support these conclusions was obtained by repeating the measurements on similar material to which extra carbon had been added. This had the effect, as expected, of slowing down the grain boundary migration more in the high velocity region than in the low. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1964
- Accession Number
- AD0607236
Entities
People
- A. A. Johnson
- E. J. Hughes
- G. Abowitz
- P. W. Barton