| Numéro |
J. Phys. Colloques
Volume 51, Numéro C1, Janvier 1990
Proceeding of the International CongressIntergranular and Interphase Boundaries in materials |
|
|---|---|---|
| Page(s) | C1-557 - C1-562 | |
| DOI | https://doi.org/10.1051/jphyscol:1990187 | |
DOI: 10.1051/jphyscol:1990187
RECOVERY AND DIFFUSION ON GRAIN BOUNDARIES IN ALUMINIUM
J. KWIECISKI et J. W. WYRZYKOWSKIInstitute of Materials Science and Engineering, Warsaw University of Technology, Narbutta 85, 02-524 Warsaw, Poland
Abstract
Investigations of recovery and diffusion on Grain Boundaries (GB) in polycrystalline aluminium at low temperatures were performed using the dislocation spreading method. The kinetics of isothermal GB recovery was determined. The results obtained show that the logarithmic law of recovery obtains. which is characteristics of recovery of mechanical properties. The distribution functions of GB diffusivity were determined and they served, as a basis for calculating the parameters of GB self-diffusion : preexponential factor and activation energy. It was found that GB self-diffusion is the rate controlling factor of the recovery process. The effect of thermo-mechanical treatment on both the kinetics of GB recovery and the distributions of GB diffusion parameters was presented. The distributions of GB diffusion parameters can be used as GB characteristics of polycrystal.