The isochronal magnetic permeability disaccommodation has been investigated in four α‐FeV (0.3 to 0.9%)–C alloys in the region of the Snoek relaxation. Besides the carbon Snoek process two further relaxations are found, originated from directional ordering of point relaxators. It is shown, that one is due to CV pairs, the other to CC pairs. In samples aged at room temperature a fourth process occurs, whose intensity increases with ageing time. Its pre‐exponential factor amounts to (1 to 5) × 10−11 s and its peak temperature shifts with time. It is suggested that the last relaxation corresponds to thermally activated dislocation movements.
Magnetic after‐effects have been investigated in α‐Fe–Al–C samples containing from 0.1% to 1.5% aluminium. Isothermal disaccommodation curves, determined in the case of 0.1% and 0.9% Al in the temperature range between −43 and +24°C, could be decomposed into six relaxation processes (I to VI), described by a discrete spectrum of time constants. Arrhenius law parameters of the relaxation have been calculated. Relaxation II has been proved to be the carbon Snoek relaxation. Relaxations III and I are originated from directional ordering of C‐C and C‐Al pairs, respectively.
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