Внутреннее Трение В Металлах, Связанное С Дислокациями

Niblett, D.; Uilks, Dzh

doi:10.3367/ufnr.0080.196305d.0125

Cited by 17 publications

(2 citation statements)

References 7 publications

(11 reference statements)

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“…According to our experiments, it was equal to 0.19 eV. The experimentally measured defect of the Young modulus ΔM/M allows us to estimate the average length L c of the oscillating dislocation segment at different temperatures [6]. Results of such calculations for LiF I at ε 0 = 5⋅10 -6 and a frequency of 40 kHz are given in Table 3.…”

Section: Initial Segments Of Curves Illustrating the Dependence Of Thmentioning

confidence: 98%

Influence of thermal activation on dislocation inelasticity of LiF crystals with different impurity compositions

2008

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The method of double piezoelectric oscillator is used to investigate the influence of thermal activation (293-573 K) on the dislocation inelasticity and dislocation structure of the annealed LiF crystals having different impurity compositions. On curves illustrating the dependence of the internal friction on the strain amplitude δ(ε 0 ), a peak having a hysteresis nature is established; it is displaced toward smaller ε 0 values with increasing temperature. A subsequent increase in δ(ε 0 ) after passage of the peak is caused by the processes of dislocation multiplication upon exposure to ultrasound.

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Section: Initial Segments Of Curves Illustrating the Dependence Of Thmentioning

confidence: 98%

Influence of thermal activation on dislocation inelasticity of LiF crystals with different impurity compositions

2008

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“…When intense elastic oscillations and waves are excited in polycrystalline solids, dislocation amplitude-dependent internal friction (ADIF) occurs, which leads to nonlinear damping decrement (DD) and elastic modulus defect (EMD) [1][2][3][4][5][6][7][8][9][10][11]. The ADIF phenomenon is explained within the framework of hysteresis equations of state.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear acoustic effects in polycrystalline solids with saturation of amplitude-dependent internal friction

Назаров

Kiyashko

2022

Physics of the Solid State

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Theoretical and numerical studies of nonlinear acoustic effects arising from the propagation of initially harmonic waves in polycrystalline solids with saturation of amplitude-dependent internal friction have been carried out. Two main types of hysteresis are considered: elastic and inelastic. A comparative analysis of the regularities of nonlinear effects is carried out and the characteristics of nonlinear quasi-harmonic waves in such media are determined: amplitude-dependent losses and changes in propagation velocity, as well as amplitudes of higher harmonics. A method for determining the type of polycrystal hysteresis based on the analysis of theoretical and experimentally established amplitude dependences of nonlinear effects is proposed. Keywords: elastic waves, amplitude-dependent internal friction.

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Aging of beryllium bronze under programmed loading conditions

Duraev¹,

Kaplun²

1987

Met Sci Heat Treat

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Внутреннее Трение В Металлах, Связанное С Дислокациями

Abstract: Пунктирной линией показано внутрен-нее трение железа, свободного от азота и углерода юв.

Cited by 17 publications

References 7 publications

Influence of thermal activation on dislocation inelasticity of LiF crystals with different impurity compositions

Influence of thermal activation on dislocation inelasticity of LiF crystals with different impurity compositions

Nonlinear acoustic effects in polycrystalline solids with saturation of amplitude-dependent internal friction

Aging of beryllium bronze under programmed loading conditions

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