Possibilities of magnetic inspection of plastic deformations preceding failures of low-carbon steels constructions

Ничипурук, А. П.; Сташков, А. Н.; Костин, В. Н.; Korkh, M. K.

doi:10.1134/s1061830909090034

Cited by 16 publications

(3 citation statements)

References 11 publications

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“…The development of these techniques was discussed in numerous studies, e.g. in [3][4][5][6], but practically all of them ignored the history of the preliminary plastic strain of the material.…”

Section: Introductionmentioning

confidence: 99%

Studying the effect of elastic-plastic strain and hydrogen sulphide on the magnetic behaviour of pipe steels as applied to their testing

et al. 2018

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Abstract. The paper reports results of magnetic measurements made on samples of the 12GB pipe steel (strength group X42SS) designed for producing pipes to be used in media with high hydrogen sulphide content, both in the initial state and after exposure to hydrogen sulphide, for 96, 192 and 384 hours under uniaxial elastic-plastic tension. At the stage of elastic deformation there is a unique correlation between the coercive force measured on a minor hysteresis loop in weak fields and tensile stress, which enables this parameter to be used for the evaluation of elastic stresses in pipes made of the 12 GB pipe steel under different conditions, including a hydrogen sulphide containing medium. The effect of the value of preliminary plastic strain, viewed as the initial stress-strain state, on the magnetic behaviour of X70 pipe steels under elastic tension and compression is studied. Plastic strain history affects the magnetic behaviour of the material during subsequent elastic deformation since plastic strain induces various residual stresses, and this necessitates taking into account the initial stress-strain state of products when developing magnetic techniques for the determination of their stress-strain parameters during operation.

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Section: Introductionmentioning

confidence: 99%

Studying the effect of elastic-plastic strain and hydrogen sulphide on the magnetic behaviour of pipe steels as applied to their testing

et al. 2018

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“…In world practice, magnetic methods have lately been applied to evaluating the stress strain state of products and structural components [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Various problems on this subject matter are rather difficult to solve; therefore it is the effect of mainly uniaxial [7][8][9][10][11][12][13][14] (and much more rarely biaxial [15][16][17]) strains on the magnetic properties of ferromag netic materials that is consistently studied, whereas there are no research on the evaluation of the full stress tensor by magnetic methods.…”

Section: Introductionmentioning

confidence: 99%

Different remanence states and their resistance to external effects. Discussing the “method of magnetic memory”

Горкунов

2014

Russ J Nondestruct Test

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The remanence of a ferromagnet is formed under the influence of many factors, the main of which are a magnetic field (DC and AC), temperature, mechanical stress, and chemical transfor mations. Remanences obtained by different ways are differently resistant to external influences. Remanence observed in structural elements may result from one factor or from all of the above. It is shown that the use of remanence as a parameter for assessing the stress strain state, i. e. the "method of magnetic memory", without taking into account the conditions of the formation of the remanence state in a product area under testing will have low assessment reliability.

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“…Nichipuruk proposed an internal stress calculation method based on IP technology. When using it to estimate the stress above 60MPa, the error is within 10%, and the extracted signal is interpreted at the domain level [14,15,16].…”

mentioning

confidence: 99%

Research on Yield Strength Estimation and Lift-off Suppression Method Based on Incremental Permeability Features

Liu

Wang

et al. 2023

J Nondestruct Eval

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The incremental permeability(IP) is related to the reversible domain movements of ferromagnetic materials during the period of dynamic magnetization. The IP signal generated by reversible domain motion is weak, during the experiment, the vibration of the platform and the uneven surface of the sample will affect the lift-off value of the probe, resulting in the distortion of the IP signal. In order to solve this problem, the change of IP feature γ reflecting the average grain size of the material under different lift-off conditions is studied, and the corresponding relationship between this feature and lift-off is quantitatively analyzed. In this paper, the fitting method of γ curve is revised to reduce its fitting under different lifting conditions . Two parameters 𝑎 𝛾 and 𝑏 𝛾 are proposed to modify the γ curve when lift-off changes. Finally, the yield strength of the material is estimated under different lift-off conditions, and the estimation error is less than 10%.

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Possibilities of magnetic inspection of plastic deformations preceding failures of low-carbon steels constructions

Cited by 16 publications

References 11 publications

Studying the effect of elastic-plastic strain and hydrogen sulphide on the magnetic behaviour of pipe steels as applied to their testing

Studying the effect of elastic-plastic strain and hydrogen sulphide on the magnetic behaviour of pipe steels as applied to their testing

Different remanence states and their resistance to external effects. Discussing the “method of magnetic memory”

Research on Yield Strength Estimation and Lift-off Suppression Method Based on Incremental Permeability Features

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