Acoustic properties of low-carbon 2% Mn-doped steel manufactured by laser powder bed fusion technology

Муравьева, О. В.; Муравьев, В. В.; Volkova, L. V.; Kazantseva, N. V.; Ничипурук, А. П.; Сташков, А. Н.

doi:10.1016/j.addma.2022.102635

Cited by 10 publications

(1 citation statement)

References 57 publications

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“…Значения коэрцитивной силы на заготовках измерены с помощью коэрцитиметра КИФМ-1Н, состоящего из датчика и электронного блока [18]. Объект контроля устанавливался на датчик в двух точках (6 и 12) так, чтобы 9-я точка являлась средней, в соответствии со схемой, представленной на рис.…”

Section: в качествеunclassified

Acoustic and Electromagnetic Properties of Civilian Gun Blanks

Muravyov,

Muravyova,

Vagapov

et al. 2023

Intellekt. Sist. Proizv.

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The non-uniformity of acoustic properties of civilian gun barrel blanks has been studied. Four samples of civilian gun barrel blanks from the same batch, obtained after the first stage of the technological process, were subjected to the study. The blanks are of cylindrical shape with diameter of 34 mm, 210 mm in length and are made of high quality carbon steel 50A. In the research, a control echo-shadow method of multiple reflections was used with the application of an electromagnetic-acoustic transducer and a piezoelectric transducer based on a polyvinyl-dente-fluoride film for excitation and reception of waves. On the basis of the studies carried out using the echo-shadow method of multiple reflections on the samples of civilian gun barrel blanks, the following informative parameters were measured: the speed of the transverse, longitudinal and Rayleigh waves, and the elastic moduli and Poisson's ratio were calculated on their basis. The echo-shadow method of multiple reflections showed high sensitivity of the measured informative parameters of ultrasonic waves to material inhomogeneities in individual sections along the length of barrel blanks, which may be due to violations of machining processes. For transverse and Rayleigh waves, such parameters as the coefficient of detectability and dispersion are calculated, which also indicate the inhomogeneity of properties in individual sections with respect to length of the sample blanks. Using a micrometer, the diameters of the bars were measured at 17 points, and the minimum and maximum values were recorded at each point, which correlates with the results of measuring the wave velocities. The relative values of the electrical conductivity on each bar along the generatrix in 4 positions of the circle (0, 90, 180, and 270 degrees) were measured. Deviations of the obtained electric conductivity values up to 5% being the evidence of local inhomogeneities of electric properties revealing structural inhomogeneity is observed. Value inhomogeneity of coercitive force up to 0.7 A/cm along blank circumference.

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Section: в качествеunclassified

Acoustic and Electromagnetic Properties of Civilian Gun Blanks

Muravyov,

Muravyova,

Vagapov

et al. 2023

Intellekt. Sist. Proizv.

View full text Add to dashboard Cite

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Comparative Sensitivity of Informative Parameters of Electromagnetic-Acoustic Mirror-Shadow Multiple Reflections Method during Bar Stock Testing

Муравьева

Brester

Муравьев

2022

Russ J Nondestruct Test

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Estimation of Structural Degradation of the Heat Affected Zone of the Welded Joint Under Fatigue

Гончар

Anosov

Ryabov

2022

Russ J Nondestruct Test

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We consider the features of using modern nondestructive methods for assessing structural degradation in the process of elastic-plastic cyclic loading of normalizing (average grain size 10 μm) and overheating (average grain size 45 μm) zones of the heat affected zone of St3 steel. In this case, the approaches of digital image processing of microstructures, fractal analysis, and ultrasonic and magnetic testing were used. The features of the stages of degradation of the structure under fatigue and the corresponding behavior of the numerical microstructure parameters such as fractal dimension and the concentration and fraction of defects and slip bands are analyzed, as well as changes in the elastic properties of the material under study (determining an acoustic parameter that takes into account the complex change in the velocities of longitudinal and transverse waves) and the coercive force. It has been established that cyclic loading of samples from the sections of the heat affected zone leads to the formation of a large number of structural defects in the form of deformation bands, discontinuities, and microcracks, the occurrence of which is accompanied by a considerable change in the numerical microstructure characteristics (a decrease in the value of fractal dimension) as well as elastic (a decrease in the values of acoustic parameters) and magnetic (an increase in coercive force) properties. It is also shown that cyclic loading of the material under study leads to an increase in microhardness. However, the nature of such an increase for overheating and normalizing zones is different. The results of the research can be applied to the problems of diagnosing premature destruction and monitoring the most loaded zones of St3 steel structures to determine the residual resource.

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Acoustic properties of low-carbon 2% Mn-doped steel manufactured by laser powder bed fusion technology

Cited by 10 publications

References 57 publications

Acoustic and Electromagnetic Properties of Civilian Gun Blanks

Acoustic and Electromagnetic Properties of Civilian Gun Blanks

Comparative Sensitivity of Informative Parameters of Electromagnetic-Acoustic Mirror-Shadow Multiple Reflections Method during Bar Stock Testing

Estimation of Structural Degradation of the Heat Affected Zone of the Welded Joint Under Fatigue

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