Question of the mechanism of formation of the damping condition of high-chromium ferritic steels

Golovin, I.S.; Rokhmanov, N. Ya.

doi:10.1007/bf00774921

Met Sci Heat Treat

1993

DOI: 10.1007/bf00774921

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Question of the mechanism of formation of the damping condition of high-chromium ferritic steels

I.S. Golovin¹,

N. Ya. Rokhmanov²

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1994

2023

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Cited by 8 publications

(3 citation statements)

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“…The data published in [1,2,[4][5][6] and the results of our study agree in that all the structural factors in single-phase metals and ai! '~ys that restrict the mobility of domain boundaries under the effect of a field of variable stresses decrease their damping properties.…”

supporting

confidence: 90%

“…Thus, steel 06Kh6F2 contains several times more carbides than steel 01Kh6F2. This is shown convincingly in [4] even for a carbon content of 0.03%. Carbides fix effectively the domain boundaries and decrease their mobility, thus reducing the contribution of the magnetoelastic processes to the damping ( Fig.…”

mentioning

confidence: 54%

“…In [4,5] annealing of ferritic steels with a composition close to that of the steels studied was conducted by another regime, namely, cooling at a rate of 2 K/min to 600~ and then in air. Intermetallic compounds or, at least, chemical inhomogeneities (lamination) and superstructures (ordering) can be formed in the process of slow cooling, which decreases the decrement of damping in all cases.…”

mentioning

confidence: 99%

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Effect of the heat-treatment regime and carbon content on the damping properties of steel 01Kh6F2

Потехин

Potekhin

1997

Met Sci Heat Treat

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The high damping properties of ferrite chromium steels caused by magnetoelastic hysteresis depend substantially on the defects of the crystal structure. For this reason the regimes of mechanical and heat treatment can change their damping level by more than a factor of 10. Elimination of thermal stresses and deformations in parts, prevention of formation of carbides, intermetallic compounds, or chemical inhomogeneities in the structure of steels, and the reduction of the specific surface of the boundaries are known, but still insufficiently studied, ways of attaining a highly damped state in steels and alloys. The present work concerns the effect of the mentioned factors and some others on the damping properties of a ferrite steel of grade 01Kh6F2. Another object of study is the effect of a variable magnetic field on the damping and the defect of the shear modulus. The results obtained are analyzed to interpret the regular features established.

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supporting

confidence: 90%

mentioning

confidence: 54%

mentioning

confidence: 99%

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Effect of the heat-treatment regime and carbon content on the damping properties of steel 01Kh6F2

Потехин

Potekhin

1997

Met Sci Heat Treat

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Influence of the temperature on the damping ability of high chromium ferritic steel

Golovin¹,

Varvus²

1994

Met Sci Heat Treat

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At the international conference on problems of internal friction (ECIFUAS-6) the problem of attaining a highly damping state of metallic ferromagnetic materials and of ensuring stability of their operational properties was extensively discussed. The conference participants presented the results of investigations of the influence of the degree of preliminary strain, of static stresses [1], of internal stresses of different origin [2] on the attainment of a highly damping state of high chromium steels.Chromium ferritic steels (known abroad as "Silentalloy") are highly damping structural materials that are very promising for widespread industrial application.In ferritic steels the main cause of attenuation of mechanical vibrations is magnetoelastic hysteresis. In ferromagnetic materials there arises, together with elastic strain Eel, an additional mechanostriction strain es under the effect of external applied stresses, which is brought about by a change of orientation of the vector of local magnetization. Overall strain is e = Eel + E s. Under the effect of reversed cyclic stresses the domain boundaries are shifted with a frequency equal to the frequency of the external vibrations, and that leads to additional energy dissipation. The losses on magnetoelastic hysteresis AW are correlated with the amplitude of the acting cyclic stresses cr by the expression AW = Do n, where D is a coefficient depending on the type of material; n < 3 [3].We investigated ferritic high chromium steels containing 0.03 % C, 25 % Cr, and 4 % Mo. The amplitudinal dependence (AD) of internal friction (IF) and the shear modulus (SM), measured according to the square of the frequency f2, in specimens with 0.8-mm diameter made of high chromium ferritic steels were determined in a wide range of temperatures (-190-820°C) and strain amplitudes ((1-140)10-5). The characteristics were measured on a reversing torsion pendulum (f -= 0.4 --1 Hz) both visually according to the number of oscillations in the selected range of strain amplitudes A2-A 1, and automatically according to the time of passage of a light beam across a constant base. The semiautomatic installation type reversing torsion pendulum has a low level of intrinsic mechanical losses in measurements [4], and its use therefore makes it possible to estimate very accurately the internal energy dissipation by the material of the specimen.For the most reliable determination of magnetoelastic absorption we used the method of measuring the characteristics of IF and of the shear modulus SM as functions of the strain amplitude 3' with their minimally possible averaging. The method of measuring IF (Q-1), f2, and 3' is based on measurement of the time intervals of the passage of a light beam, connected with

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Mechanism of phase structure modulating damping in Fe73Ga27 alloy

Yan

Liu

et al. 2023

Intermetallics

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Question of the mechanism of formation of the damping condition of high-chromium ferritic steels

Cited by 8 publications

References 6 publications

Effect of the heat-treatment regime and carbon content on the damping properties of steel 01Kh6F2

Effect of the heat-treatment regime and carbon content on the damping properties of steel 01Kh6F2

Influence of the temperature on the damping ability of high chromium ferritic steel

Mechanism of phase structure modulating damping in Fe73Ga27 alloy

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