Abstract
Parameters of Snoek relaxation in binary alloys of iron with Co, Ge, Al, and Si have been studied. The concentration of Al was varied from 1.5 to 16 at. %, and that of Si, from 3 to 10 at. %, in binary (Fe-Al, Fe-Si) and ternary (Fe-Al-Si) alloys. It has been shown that Co and Ge added to α-Fe in amounts to ∼3 at. % only wekaly affect the parameters of the Snoek peak, i.e., the height, width, and shape of the peak, as well as the activation energy for diffusion of carbon atoms. Aluminum and silicon lead to a qualitatively the same effect—a broadening of the Snoek peak on the high-temperature side, which indicates an increase in the activation energy for carbon diffusion and carbon redistribution in iron. The quantitative effects of Al and Si are different. To analyze these effects, a computer analysis of the curves of the temperature dependence of internal friction has been applied.
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