The magnetic Dis accommodation, i.e., the time dependence of the low field magnetic permeability, was investigated in cobalt base alloys containing 0-5.1 at.% (0-4.2 wt.%) titanium in the temperature range 400-700°C. A strong temperature dependence of the Dis accommodation observed in the range 430-530°C could be accounted for predominantly by a single first order relaxation process. Analyzing the data in terms of (a) a single exponential relaxation, (b) a lognormal distribution of relaxation times, and (c) a sum of exponential relaxations, it was shown that the relaxation strength varies as the square of the titanium concentration and that the relaxation is characterized by an activation enthalpy of 69 ± 1 kcal/mole and a τ0 of the order of 10-16 sec. The Dis accommodation was attributed to the reorientation of substitutional solute atom (titanium) pairs. From the temperature dependence of the relaxation strength the binding energy of Ti atom pairs was determined to be 0.17 ± 0.08 eV. © 1968.
H. B. Aaron et al., "Zener Disaccommodation In Dilute F.C.C. Co-Ti Alloys," Acta Metallurgica, vol. 16, no. 3, pp. 269 - 284, Elsevier, Jan 1968.
The definitive version is available at https://doi.org/10.1016/0001-6160(68)90012-6
Materials Science and Engineering
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01 Jan 1968