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u 9 = 0.338; it lo = 0.588; ~13 = 0.087; u14 = - 1.582; !~15 = - 1.025; ~ 16 = 0.244; 0r 15/0ql5 = -0.884; O/~lo/Oqlo = 0.284; Or 3 = 0.350; OJtl4/Oql 4 = -1.403; O ttl6/Oql 6 = 0.480; O!tl7/Oql 7 = 0.570; ~ttl/Oql = 0.056; O/t7/Oq7 = 0.180; O/t9/Oq9 = 0.182; O~tl5/Oql 4 = 0.621; O!tlo/Oql 3 = 0.373; OltlO/Oql 4 = 1.065; O!tl3/Oql 4 = 0.875; Ot~14/Oql 0 = 0.209; Oltl4/Oql 3 = -0.497; O/dl4/Oqt 5 = 0.515; 0/~2/0q2 =-0.561; O tt3/Oq3 =-1.103; Or = 0.163; O,Ul6/Oql 7 = 0.200; 0u10/~,3, 4 = -1.366; O!tlO/Of13,9 = 0.358; O!tlO/Ofllo,13 = 0.115; 0r = 1.431; O,ttlo/Ofll3,14 = -0.272; ,~!~ 15/i~,1o,~4 = -0.306; O!t15/Ofl13,14 = 0.376; 0/~l.s/&/14,15 = -0.469; 0#15/01315,16 = 0.100; 0,tt 13/0/310,l 3 = -0.026; Ojt13/(~,lO,14 = 0.282; 0!t13/0/313,14 = 0.755; 0jtla/0fll0,13 = -0.554; Or l 4 = 0.389; 0kt14/0fl13,14 = -0.012; ~?!~14/~q4,15 = -0.524; O!tl/Of16,7 = -0.048 0,u7/0fll,8 = 0.079; 0!t16/01315,16 = -0.564

The method presented in this paper for measuring dynamic magnetostriction gives an idea of the value of the magnetostriction and the shape of its curve as well as its rate of change. It also permits oscillograms to be made of the magnetostriction hysteresis loop as a function of the magnetization field strength and induction. The sensitivity of the arrangement is 1·10−17, and the error of measurement is ∼5%.

The anisotropy of dynamic magnetostriction λ∼ is investigated without external stresses, in extension, and in compression. Results are obtained expressing the λ∼(B) dependence for constant elastic stresses and also — λ∼(σ) for certain induction values. Oscillograph traces are taken of the λ∼(H) and B(H) hysteresis loops with the specimens under investigation in extension and compression.

The effect of electrolytically deposited nickel films on the magnetostriction, coercive force, residual induction, and the position with respect to each other of the magnetic susceptibility maxima κmax↑↓. κmax ↑→ of specimens of iron-silicon alloy is investigated. It is shown that elastic extensions lead to a reduction in the spacing between the maxima κmax↑↓, κmax ↑→, and for certain loads this spacing disappears and only one maximum is observed.

1. Extension of nickel-plated transformer steel changes the form of the μΔ hysteresis loop. 2. The initial and maximum permeabilities increase simultaneously during the extension. 3. The experimental data confirm that there is a magnetic interaction between the plating and the substrate .

1. Zinc films deposited on a transformer steel surface create compressive stresses and worsen the magnetic properties. 2. The effect of a zinc film melted on the surface of transformer steel samples on the magnetic properties is anisotropic.