| Issue |
J. Phys. Colloques
Volume 46, Number C10, Décembre 1985
Eighth International Conference on Internal Friction and Ultrasonic Attenuation in Solids
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| Page(s) | C10-383 - C10-386 | |
| DOI | https://doi.org/10.1051/jphyscol:19851086 | |
J. Phys. Colloques 46 (1985) C10-383-C10-386
DOI: 10.1051/jphyscol:19851086
INVESTIGATION OF THE DISTRIBUTION OF RARE EARTH ELEMENTS IN PURE Al BY THE METHOD OF INTERNAL FRICTION (PART 1)
JIANG ZI-YING1 and CAI WEI-PING21 Northeast University of Technology, Shenyang, Liaoning, China
2 Wuhan Iron and Steel University,Wuhan, Hubei, China
Abstract
In this paper, the distribution of rare-earth elements in pure Al was investigated by the method of internal friction with a high vacuum Ke's pendulum. The samples are pure Al (99.99%) with various contents of RE (0-3%, nine in number). The effect of rare-earth addition on grain-boundary relaxation of Al, and the unpinning of dislocations at room temperature was measured. It has been found that the peak height and background decrease with increasing RE content up to 0.5%, and that when RE > 0.5%, the peak height changes little but the background rapidly increases with RE content increase. In view of these facts, the distribution of RE in Al was inferred . The binding energy between RE impurity and dislocations was estimated to be about 0.19 eV.