N. S. Priyatkin, K. V. Egorova, M. V. Arkhipov, L. P. Gusakova, A. M. Artemyeva, O. B. Ivanchenko, A. D. Litvinova, Yu. V. Chesnokov
{"title":"Nondestructive Testing of Brassica rapa L. Seeds Using Microfocus Radiography","authors":"N. S. Priyatkin, K. V. Egorova, M. V. Arkhipov, L. P. Gusakova, A. M. Artemyeva, O. B. Ivanchenko, A. D. Litvinova, Yu. V. Chesnokov","doi":"10.1134/S1061830926600899","DOIUrl":"10.1134/S1061830926600899","url":null,"abstract":"<p>The paper presents data on the study of the effect of contrast photoperiods (12 and 16 hours) on the quality of cabbage crop seeds using the example of lines of doubled haploids of mapping populations of <i>Brassica rapa</i> L. grown under the conditions of phytopolygon of Agrophysical Research Institute. To study the quality of seeds, the method of microfocus radiography was used, in combination with visual and automatic decryption of X-rays and a conjugate assessment of seed qualities. For the first time, using the X-ray method, it was established that seed samples of 7 <i>Brassica rapa</i> L. genetic lines grown under conditions of a 16-hour photoperiod will have better inoculation qualities compared to those grown under conditions of a 12-hour photoperiod due to greater accomplishment, as well as lower values of the proportion of hidden defects evaluated visually from X-ray images: sign “d” (irregular darkening projections), sign “e” (noncompletion), sign “u” (angular projection), sign “p” (drawing), and sum of defects (d+e+u+p). It has been shown that with an increase in the total level of internal damage (voids, porosity), the total percentage of seed germination sharply decreases. The inverse correlation effect, confirmed by the correlation coefficients <span>({{r}_{3}} = - 0.877)</span> by significance value (<span>(p < 0.01)</span>) and <span>({{r}_{6}} = - 0.856)</span> <span>((p < 0.01))</span> between the percentage of defective areas (X-ray) and germination indicators, proves the predictive value of X-ray signs for assessing seed sowing properties without destroying them.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":"62 4","pages":"481 - 488"},"PeriodicalIF":1.3,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optimization of the Nonuniform Matrix Phased Array Layout for Efficient Volumetric Ultrasonic Imaging","authors":"D. O. Dolmatov","doi":"10.1134/S1061830926600863","DOIUrl":"10.1134/S1061830926600863","url":null,"abstract":"<p>Implementing volumetric ultrasonic imaging based on the synthetic aperture focusing technique (SAFT) requires processing a large volume of ultrasonic signals and imposes high requirements on the ultrasonic transducers and multichannel ultrasonic electronics used. One promising approach to overcoming these challenges is to use non-uniform matrix phased arrays. Unlike conventional (uniform) matrix phased arrays, such probes enable a significant reduction in the number of active elements without a corresponding decrease in imaging quality. The layout of these probes is a key factor in determining their performance. Therefore, the array configuration must be chosen with respect to the ultrasonic imaging conditions. This paper proposes an algorithm for determining the optimal configuration of a non-uniform matrix phased array with active elements arranged in the form of a Fermat spiral. The algorithm is based on simulated annealing, which enables the effective solution of multi-parameter optimization problems. The developed algorithm was used to search for the optimal configuration under specific ultrasonic imaging conditions. Analysis showed that, under the considered inspection conditions, the obtained configuration has a point spread function that is narrow in the main lobe while having a low side lobe level. Furthermore, this non-uniform matrix phased array configuration reduces the number of elements by 9-fold compared to a uniform array, while maintaining the same aperture size. Experimental verification has confirmed that the proposed configuration provides high spatial resolution and a high signal-to-noise ratio in the restored acoustic images.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":"62 4","pages":"419 - 426"},"PeriodicalIF":1.3,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Yu. Chertishchev, P. V. Solomenchuk, V. A. Strizhak, S. A. Murashov
{"title":"Estimation of the Size of Defect Models in the Testing of Pipelines by Torsional Waves","authors":"V. Yu. Chertishchev, P. V. Solomenchuk, V. A. Strizhak, S. A. Murashov","doi":"10.1134/S1061830926600978","DOIUrl":"10.1134/S1061830926600978","url":null,"abstract":"<p>The acoustic inspection method utilizing waveguide propagation effects (waveguide inspection or guided wave technique) with the use of torsional waves is finding increasingly widespread application in pipe inspection due to its ability to inspect long sections without scanning. Due to the dependence of the amplitude of the reflected torsion wave signals on a number of defect parameters, estimating their size is a difficult scientific and technical task. The paper presents an approach to determining the geometry of equivalent artificial reflectors. An analytical model is proposed, confirmed by finite element modeling and experimental studies using multi-frequency probing. The possibility of independently determining the length and depth of an equivalent artificial reflector based on the results of sounding a pipe at different frequencies is shown.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":"62 4","pages":"442 - 451"},"PeriodicalIF":1.3,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Peng Jiang, Deyu Sun, Heyu Cao, Luying Zhang, Wei Li
{"title":"Nonlinear Ultrasonic Evaluation of Early Corrosion Evolution in Aluminum Alloy Plates using the Zero-Frequency Component","authors":"Peng Jiang, Deyu Sun, Heyu Cao, Luying Zhang, Wei Li","doi":"10.1134/S1061830926600127","DOIUrl":"10.1134/S1061830926600127","url":null,"abstract":"<p>To address the challenge of quantitatively characterizing early corrosion in metallic plates, this paper proposes a novel nonlinear ultrasonic method based on the zero-frequency component (ZFC) of low-frequency Lamb waves. By employing a low-frequency excitation strategy to suppress multi-mode interference, the proposed method achieves cumulative growth of the ZFC signal under the group velocity matching (GVM) condition, thereby significantly mitigating the influence of dispersion. Experimental investigations reveal that the nonlinear coefficient of the static component exhibits a distinct, non-monotonic “increase-then-decrease” evolution pattern with the aggravation of corrosion. Mechanism analysis indicates that this phenomenon is attributed to the competitive mechanism between the nonlinearity enhancement induced by incipient micro-defects and the coherent scattering attenuation caused by surface roughness in the later stages. This study validates the high sensitivity of the ZFC method to incipient damage, providing a solid theoretical foundation for the quantitative assessment of the entire corrosion process in metallic structures.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":"62 4","pages":"465 - 480"},"PeriodicalIF":1.3,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. V. Osiyanenko, E. I. Kosarina, A. A. Demidov, A. V. Smirnov
{"title":"Porosity in Castings from Silumin Group Alloys and its Assessment by X-ray Computed Tomography","authors":"N. V. Osiyanenko, E. I. Kosarina, A. A. Demidov, A. V. Smirnov","doi":"10.1134/S1061830926600930","DOIUrl":"10.1134/S1061830926600930","url":null,"abstract":"<p>The article describes the research of reference samples of the silumin group alloy included in the porosity scale kit, in order to determine the porosity score using X-ray computed tomography. Tomographic studies include two stages: determining the correspondence between the porosity indicated on the reference images and the porosity, determined by the grind, as specified in GOST (State Standard) 1583–93; unambiguous determination of porosity in a control object based on its tomogram.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":"62 4","pages":"489 - 497"},"PeriodicalIF":1.3,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. O. Nekhoroshev, R. K. Belikov, D. A. Derusova, V. Yu. Shpilnoy, D. V. Ermakov
{"title":"Acoustic Methods of Nondestructive Testing and Defect Detection for Lightweight Composite Sandwich Panels","authors":"V. O. Nekhoroshev, R. K. Belikov, D. A. Derusova, V. Yu. Shpilnoy, D. V. Ermakov","doi":"10.1134/S1061830926600929","DOIUrl":"10.1134/S1061830926600929","url":null,"abstract":"<p>The present work is devoted to nondestructive testing and to the investigation of the damping properties of lightweight sandwich panels using acoustic nondestructive testing methods. The objects of study are full-scale specimens of multilayer sandwich panels with fiberglass and carbon-fiber face sheets and a foamed polymer core. Artificial defects in the specimens included closed cavities, delaminations, and open cavities in the core. Using electrodynamic and impact shaker rigs, the damping properties of the multilayer panel specimen were determined under harmonic vibration excitation in the frequency range from 100 Hz to 10 kHz. Nondestructive testing of representative defects was performed by scanning laser Doppler vibrometry with noncontact acoustic stimulation provided by a gas-discharge electroacoustic transducer. The obtained results made it possible to evaluate the damping characteristics of composite sandwich panels, their ability to attenuate external acoustic excitation, and to detect defects in the frequency range from 100 Hz to 32 kHz.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":"62 4","pages":"427 - 441"},"PeriodicalIF":1.3,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Amarnath, C. Rajendran, A. Senthilkumar, K. Mallieswaran
{"title":"A Non-Destructive Testing Method to Measure the Electrical Conductivity of Welded Electrolytic Tough Pitch Copper joints","authors":"V. Amarnath, C. Rajendran, A. Senthilkumar, K. Mallieswaran","doi":"10.1134/S1061830925605689","DOIUrl":"10.1134/S1061830925605689","url":null,"abstract":"<p>A non-destructive eddy current testing was adapted in this investigation to investigate the electrical conductivity of electrolytic tough pitch copper. Various joining methods were used to join the copper, which were gas tungsten arc welding with two modes (constant current and pulsed current), solder braze, phosphor bronze braze, and friction stir welding. The test result indicated that copper joints that were made using solid-state welding process, especially the friction stir welding, had a greater electrical conductivity (5.7 × 10<sup>7</sup> Sm/m), as compared to their counterparts. The given improvement of the properties can be explained by the existence of fine, recrystallized grains in the joint interface with no intermetallic layer observed in the area of the weld itself. Phosphor bronze brazed and solder brazed joints, in contrast, had low electrical conductivity because of the abundance of large number of discontinuities and creation of intermetallic layers.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":"62 4","pages":"505 - 516"},"PeriodicalIF":1.3,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nondestructive Testing Method for Electrical Capacitance Tomography Based on Gaussian Kernel-Weighted Sensitivity Matrix","authors":"Zongshun Ling, Yang Gao, Yongzhi Luo, Qian Zhang, Ruxue Li, Chenghua Liang","doi":"10.1134/S106183092660005X","DOIUrl":"10.1134/S106183092660005X","url":null,"abstract":"<p>Electrical capacitance tomography (ECT) is a non-destructive imaging technique that uses capacitance values to reflect the distribution of the measured medium. The inherent “soft field” characteristic of ECT leads to a sensitive field distribution with higher sensitivity at the edges and lower sensitivity at the center, reducing the imaging resolution in the central region and presenting a major challenge to multi-object image reconstruction. To address the aforementioned issues, this paper proposes an ECT image reconstruction method based on a Gaussian kernel weighted sensitivity matrix. Four sensitivity matrices with different Gaussian kernel widths are presented, and their performance and quality of the reconstructed images are tested using sensitivity matrix and reconstructed image evaluation metrics. The results show that a sensitivity matrix based on an appropriately wide Gaussian kernel weighting can effectively improve its performance and enhance the quality of the reconstructed image.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":"62 4","pages":"517 - 528"},"PeriodicalIF":1.3,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aayush Joshi, Kranti Jain, Ajay Chourasia, Manoj Kumar Panda
{"title":"Ultrasonic Acoustoelastic Coefficients for Stress Evaluation in Concrete Member Subjected to Flexural Loading","authors":"Aayush Joshi, Kranti Jain, Ajay Chourasia, Manoj Kumar Panda","doi":"10.1134/S1061830925605604","DOIUrl":"10.1134/S1061830925605604","url":null,"abstract":"<p>This study investigates the acoustoelastic response of concrete elements subjected to flexural loading, with the objective of determining acoustoelastic coefficients for non-destructive stress estimation. While most existing research on the acoustoelastic effect in concrete focuses on uniaxial compression, this work extends the methodology to flexural conditions, where tensile and compressive stresses coexist within the same element. Ultrasonic pulse velocity (UPV) measurements were performed simultaneously in both tension and compression zones using dual ultrasonic pulse analyzers under controlled incremental flexural loading. Results revealed a clear stress-dependent variation in UPV under flexural conditions. In the compression region, velocity increased linearly with stress, indicating elastic stiffening consistent with acoustoelastic theory. In contrast, the tension zone exhibited a linear decrease in velocity due to microcrack initiation and tensile softening. Despite minor deviations caused by localized cracking, the overall velocity–stress relationship remained predominantly linear across different concrete mixes. On average, the compression zone showed a 2.5% rise in velocity, while the tension zone demonstrated a 4% reduction in wave velocity. The diverging velocity–stress trend produced a characteristic left angle bracket pattern, where the separation between the compression and tension response lines which tends to serves as a reliable indicator of the stress state in flexural members. Further, Acoustoelastic coefficients were derived from linear curve fitting of the relative velocity variation versus applied stress, establishing quantitative parameters for stress evaluation in flexural members These coefficients offer a quantitative basis for stress assessment in concrete elements under flexure, enhancing the applicability of ultrasonic techniques for structural health monitoring (SHM).</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":"62 4","pages":"452 - 464"},"PeriodicalIF":1.3,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Reaction Field of a Uniformly Magnetized Cylinder of Finite Dimensions Arbitrarily Located in Space","authors":"O. V. Kudryashova, V. Ya. Raevskii","doi":"10.1134/S106183092660053X","DOIUrl":"10.1134/S106183092660053X","url":null,"abstract":"<p>We give a general scheme for solving the inverse problem of magnetostatics is given that boils down to repeatedly solving the corresponding direct problems in the process of minimizing the deviation of the calculated values of the resulting field strength from their values obtained as a result of experimental measurements. Equations for solving the direct magnetostatics problem of calculating the field strength of a reaction inside and outside a uniformly magnetized magnet in the form of a cylinder of finite dimensions with its arbitrary location relative to the initial coordinate system are obtained. A program has been compiled in the Fortran language that implements the methodology proposed based on these equations. The possibilities of using this technique to solve the inverse problem of magnetostatics for magnets or for cylindrical through and internal cavities in it according to the above scheme are discussed.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":"62 3","pages":"338 - 346"},"PeriodicalIF":1.3,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148394914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}