"Temperature dependent after-effects of the initial permeability in ternary dilute ferromagnetic iron-base alloys were studied in the temperature range of -50°C to +30°C. Interstitial carbon and nitrogen were the diffusing elements. Nominal percentages of the substitutional transition elements manganese, chromium, vanadium and titanium were added to determine the extent of substitutional-interstitial pair interactions. No additional temperature dependent after-effect of the initial permeability was noticed in Fe- substitutional -C alloys, while such after-effects were present in Fe- substitutional -N alloys. Magnetic after-effect data were analyzed on the basis of single Debye relaxations. Relaxation times for carbon and nitrogen diffusion in alpha-iron were calculated using activation energies of 20,100 cal/mole and 17,700 cal/mole, respectively. Magnetic after-effect data were discussed on the basis of additional strain components and electronic interactions caused by the variation of the substitutional elements. It was concluded that electronic interactions cause the extra disaccommodation in Fe- substitutional -N alloys while the larger lattice distortion around carbon renders the influence of the substitutional on the interstitial mobility ineffective"--Abstract, page ii-iii.
Weart, Harry W.
Day, D. E.
Geosciences and Geological and Petroleum Engineering
M.S. in Geology
University of Missouri at Rolla
vii, 33 pages
© 1968 Robert Henry Graham, All rights reserved.
Thesis - Open Access
Transition metal alloys -- Magnetic properties
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Graham, Robert Henry, "Magnetic after-effects in dilute transition metal alloys" (1968). Masters Theses. 5343.