Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. IV France 06 (1996) C8-151-C8-154
Mechanical Spectroscopy of the Carbon Snoek Relaxation in Ultra-High Purity IronL.B. Magalas1 and G. Fantozzi2
1 University of Mining and Metallurgy, Akademia Górniczo-Hutnicza, AGH, Faculty of Metallurgy and Materials Science, Al. Mickiewicza 30, 30059 Kraków, Poland
2 INSA de Lyon, GEMPPM, Bât. 502, 69621 Villeurbanne cedex, France
Low and very low frequency mechanical loss spectra of the stable carbon Snoek relaxation in ultra-high purity α-Iron doped with 1000 at. ppm of carbon were carried out. The carbon Snoek peak was analyzed by various numerical methods in order to determine its relaxation parameters. The following mean values of the relaxation parameters were found : the activation enthalpy HS = 0.878 eV and the preexponential factor τoo=1.71.10-15s. The observed height of the stable carbon Snoek peak in saturated α-Iron Q-1max = 2.8·10-2 is to our knowledge the highest ever reported in the literature.
© EDP Sciences 1996