Russian Journal of Nondestructive Testing最新文献

{"title":"Influence of Ca2+ Substitution on Elastic Properties of CaCu3Ti4O12 Quadruple Perovskites Determined by Ultrasonic Pulse Echo Selection Technique","authors":"D. J. Parekh,&nbsp;D. V. Barad,&nbsp;D. K. Thummar,&nbsp;N. S. Kanani,&nbsp;K. B. Modi","doi":"10.1134/S1061830924601545","DOIUrl":"10.1134/S1061830924601545","url":null,"abstract":"<p>The structural, microstructural, optical, and elastic properties of polycrystalline perovskite series, Ca_1+<i>x</i>Cu_3–<i>x</i>Ti₄O₁₂; <i>x</i> = 0–1.0, have been investigated employing X-ray powder diffractometry, scanning electron microscopy, UV–Vis spectroscopy, and ultrasonic pulse-echo selection technique at 300 K. The primary structural parameter and ultrasonic parameters; longitudinal wave velocity (<i>V</i>₁), the amplitude of transmitted and reflected pulses <i>a</i>_o/<i>a</i>_n were used to calculate porous values of various elastic parameters such as shear wave velocities <i>V</i>_s, mean sound velocity <i>V</i>_m, elastic moduli <i>L</i>, <i>B</i>, <i>G</i>, <i>E</i>, Debye temperature θ, Poisson’s ratio σ, acoustic impedance <i>Z</i>, internal friction <i>Q</i>^–1, absorptivity <i>A</i>, adiabatic compressibility <i>B</i>_a, Lame’s constant λ_L, and Vickers micro-hardness <i>H</i>_v. The elastic constants were emended to a void-free state using eight distinct semi-empirical methods. These models are principally relying on the pore morphology in the material. Depending upon the correction model employed, <i>L</i>_o is found to decrease from ~21.5 to ~39.5%, <i>B</i>_o from ~17.4 to 45.6%, while <i>E</i>_o and <i>G</i>_o are found to decrease from ~22 to 34% on Ca²⁺ substitution (<i>x</i> = 0–0.5) in the system. Besides, the observed increase in different elastic moduli for <i>x</i> = 1.0 composition is found to vary from 0.3 to 7%. The compositional dependency of elastic moduli has been explained in terms of the change in interatomic bonding strength produced by variations in interatomic distances, microstructure, and electronic configuration. The values of Pough’s ratio <i>B</i>_o/<i>G</i>_o, Frantsevich’s ratio <i>G</i>_o/<i>B</i>_o, and Poisson’s ratio σ_o suggest the brittle nature of prepared ceramics.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413365","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":"Parallel Image Reconstruction Using the Maximum Likelihood Method with a Graphics Processor and the OpenGL Library","authors":"S. A. Zolotarev,&nbsp;A. T. Taruat","doi":"10.1134/S1061830924700682","DOIUrl":"10.1134/S1061830924700682","url":null,"abstract":"<p>Creating fast parallel iterative statistical algorithms based on the use of graphics accelerators is an important and urgent task of great scientific and practical importance. An algorithm based on the method of maximizing the maximum likelihood expectation (maximum likelihood expectation maximization—MLEM) is considered. The MLEM is a numerical method for determining maximum likelihood estimates and, since its first application in the field of image reconstruction in 1982, remains one of the most popular statistical image reconstruction methods and is the foundation for many other approaches. A new version of the MLEM parallel algorithm is proposed that provides global convergence of the iterative algorithm. To parallelize the algorithm, we use the texture mapping method using the OpenGL graphics library. The parallel algorithm is described in as much detail as possible. Examples of several reconstructions of images of aluminum casting products are given. The obtained result can be used for nondestructive testing of various industrial products, including testing of foundry products.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413297","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":"Changes in the Properties of Materials and Heat and Humidity Conditions for Long-Term Operation of Products and Diagnostics of the Dependence of Thermophysical Properties on Heating Rates","authors":"V. G. Degtyar’,&nbsp;V. V. Gusev,&nbsp;S. T. Kalashnikov,&nbsp;G. F. Kostin,&nbsp;A. I. Novikov,&nbsp;V. I. Khlybov","doi":"10.1134/S1061830924700700","DOIUrl":"10.1134/S1061830924700700","url":null,"abstract":"<p>The set of operations on diagnosing the changes in the properties of materials due to aging includes accelerated climate tests (ACTs) and pre- and post-ACT performance tests. Along with the use of various methods for diagnosing defects that arise and develop during aging, it is also important to determine changes in the thermophysical, hydrophysical, and other properties of materials subject to long-term operation that are associated with changes in the material structure. In this paper, we present a method for synchronous calculation of changes in thermophysical and hydrophysical properties of materials due to material aging and respective changes to the hygrothermal modes of products under long-term storage and operation. An experimental setup and a method for experimental-analytical determination of the thermophysical properties of materials at variable heating rates, as well as a method of synchronous calculation, are presented. The experimental-analytical determination method was developed using the results of thermal testing of specimens both subjected to ACT and without ACT. The analysis of the test results makes use of the approximation-superposition method to solve the inverse heat conduction problem.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413334","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":"Characterization of Euphorbia Tortilis Cactus Concrete Specimen by 3D X-ray Tomography","authors":"K. M. Gopalakrishnan,&nbsp;R. Mohanraj,&nbsp;S. Southamirajan,&nbsp;S. Ramkumar","doi":"10.1134/S1061830924601892","DOIUrl":"10.1134/S1061830924601892","url":null,"abstract":"<p>This study investigates the enhancement of Euphorbia Tortilis Cactus (ETC) infused concrete, focusing on its microstructural characteristics and mechanical properties. ETC concrete, known for superior tensile ductility and durability, was characterized using advanced 3D X-ray tomography and energy dispersive X-ray spectroscopy (EDX) analysis. Specimens with a 9% ETC extract mix underwent high-resolution Micro Computed Tomography scanning, revealing an average porosity of 3.3% and providing detailed insights into internal features like pores, fibers, and aggregates. EDX mapping identified key elements, including Si, O, Mg, and Ca, highlighting calcium carbonate and brucite formations. This research addresses gaps in understanding ETC concrete’s microstructure and mechanical behavior, using non-destructive imaging and chemical analysis to offer comprehensive insights. The findings suggest that ETC concrete can be optimized for enhanced performance in sustainable construction, highlighting its potential for applications requiring high durability and ductility. The study’s novelty lies in its application of advanced imaging and analysis techniques to optimize ETC concrete mix designs, assess durability, and develop strategies for mitigating structural issues, thus providing valuable insights into the material’s properties and behavior.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413361","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":"Calculating the DGS Curve for Images Reconstructed by Digital Focusing of Aperture Method","authors":"A. E. Bazulin,&nbsp;E. G. Bazulin,&nbsp;A. Kh. Vopilkin,&nbsp;S. A. Kokolev,&nbsp;S. V. Romashkin,&nbsp;D. S. Tikhonov","doi":"10.1134/S1061830924700645","DOIUrl":"10.1134/S1061830924700645","url":null,"abstract":"<p>The widespread introduction of antenna arrays into the practice of ultrasonic testing has made it possible to obtain images of reflectors using either phased array technology or digital focusing of aperture (DFA) technology. However, many current regulatory documents governing the rules for conducting ultrasonic nondestructive testing in nuclear power engineering, petrochemistry, gas production industry, etc. require determining the equivalent dimensions of reflectors. The present article proposes a method for calculating the DAF-DGS array to determine the diameter of an equivalent flat-bottomed hole (FBH) when analyzing an image. It is shown that it is more efficient to work not with the amplitude of the image, but with the integral amplitude. Numerical experiments have shown the accuracy of the order of <span>( pm 0.1)</span> mm in determining the FBH diameter. In model experiments, the accuracy of determining the FBH diameter was better than 0.2 mm in absolute value.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212926","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":"Analysis of Weak Signal Detection Based on Tri-Stable System under Poisson White Noise","authors":"Qiang Ma,&nbsp;Long Tian,&nbsp;Ran Peng,&nbsp;Kai Yang","doi":"10.1134/S1061830924601454","DOIUrl":"10.1134/S1061830924601454","url":null,"abstract":"<p>Poisson white noise is a typical non-Gaussian noise that can induce stochastic resonance to detect feature signals submerged within it. In this paper, we propose a detection method for overdamped tri-stable stochastic resonance in Poisson white noise environment. Based on the model of over-damped tri-stable stochastic resonance. To begin with, the influence of the parameters of the tri-stable system on the potential function is studied. Then, the cross-correlation coefficient <i>C</i>_<i>sx</i> is used to measure Poisson white noise under different pulse arrival rates β, system structural parameters <i>a</i>, <i>b</i>, <i>c</i>, and noise intensity <i>D</i> the law of action on system resonance. Ultimately, the system is successfully applied to the fault diagnosis of bearing under variable speed conditions and the background of Poisson white noise, and the simulation and experimental results are compared with the classical bistable system. The findings suggest that the performance of the system significantly surpasses that of the classical bistable system.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212932","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":"Reconstruction of the Amplitude of Signals of Acoustic Emission Based on Mathematically Modeling as a Stochastic Process","authors":"V. N. Berkovich,&nbsp;S. I. Builo,&nbsp;B. I. Builo","doi":"10.1134/S1061830924601788","DOIUrl":"10.1134/S1061830924601788","url":null,"abstract":"<p>The problem of random oscillations generated by an internal defect within the neighborhood of the boundary of an elastic massive body at the prefailure stage is considered. The study is based on the results of the invariant method in the theory of acoustic emission (AE), according to which the statistical distribution of the values of the parameters of acoustic emission (AE) signals due to a defect obeys the stability condition when the body remains at the same prefailure stage. A mathematical model of a nonstationary wave field of displacements in an elastic massive body is constructed and the issues of the correctness of its application are studied. The problem is reduced to the study of a certain boundary integral equation in special classes of stochastic processes. We pose the problem of reconstructing and describing the nature of the random process of defect emission on the free boundary of the body based on AE signals. The data of numerical analysis are presented.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212929","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":"Solid Particle Erosion Behaviour of Laser Sintered Heat Treated Ti–6Al–4V Alloy","authors":"Amit Kumar Singh Chauhan,&nbsp;Mukul Shukla,&nbsp;Abhishek Kumar","doi":"10.1134/S1061830924601533","DOIUrl":"10.1134/S1061830924601533","url":null,"abstract":"<p>Ti–6Al–4V alloy is used in high-temperature aerospace applications such as aircraft turbine discs, airframes, and other structural parts. Solid particle erosion is quite common in aerospace components. In the present work, a study has been conducted to see the effect of solid particle erosion on Ti–6Al–4V alloy fabricated by direct metal laser sintering. The fabricated sample was characterized using optical microscopy and scanning electron microscopy. It was observed that a long martensitic phase structure (in the form of α/α' laths) was retained since the heat treatment temperature was far below the β transus value. Using the Taguchi experimental approach, the SPE tests were conducted for different impact angles, velocities, and temperatures. This approach optimized the number of experiments for measuring the erosion rate and predicted the most influencing variable in the test. The scanning electron microscopy technique was also used to characterize the eroded sample. The effect of impact velocity dominated the erosion behaviour of Ti–6Al–4V alloy, followed by temperature and impact angle. At highest temperature of 650 K, erosion rate decreased with an increase in impact angle and increased with an increase in impact velocity. This study aims to identify the optimal parameter combination to minimize the erosion rate.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212935","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":"Mathematical Modeling of Radiation Transparencies in the Computational Implementation of the Dual Energy Method Based on the Analog Amplitude Analysis of Initial Signals","authors":"V. A. Udod,&nbsp;S. E. Vorobeichikov,&nbsp;S. P. Osipov","doi":"10.1134/S1061830924700669","DOIUrl":"10.1134/S1061830924700669","url":null,"abstract":"<p>A mathematical model of radiation transparencies in the computational implementation of the dual energy method based on analog discrimination of the initial signals is presented. The generalized mathematical model of radiation transparencies in the analyzed implementation of the dual energy method is based on an analog separation of initial electrical signals from an X-ray detector by amplitude into low- and high-energy signals with subsequent counting of these signals. The analog separation of X-ray detector output signals by amplitude is carried out using a two-channel amplitude analyzer. The proposed model takes into account the maximum energy of X-ray photons, the energy threshold for dividing signals into low- and high-energy ones, materials and sizes of radiation-sensitive detector elements, and parameters of test objects. The model can be used to conduct research on the effect of noise caused by the quantum nature of X-ray radiation on the quality of identification of attenuating material, for example, by effective atomic number, in relation to the considered implementation of the dual energy method, as well as for the reasonable choice of parameters of the corresponding dual energy systems of digital radiography and X-ray computed tomography.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212933","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":"Application of Digitised Frequency Modulated Thermal Wave Imaging for Testing and Evaluation of Rebar Corrosion in Concrete Structures: A Numerical Study","authors":"Anshul Sharma,&nbsp;Vanita Arora,&nbsp;Ravibabu Mulaveesala","doi":"10.1134/S1061830924601429","DOIUrl":"10.1134/S1061830924601429","url":null,"abstract":"<p>The utilization of reinforced concrete structures has an extensive past within the realm of infrastructure due to its economical nature, impressive robustness, ability to withstand adversity, and eco-friendliness, alongside the uncomplicated procurement of essential raw materials. Nevertheless, these structures have certain drawbacks, including limited tensile strength and malleability, resulting in cracks within the edifices. These cracks have the potential to permit the ingress of chlorides, leading to corrosion of the reinforcement. In order to effectively address issues of quality control, upkeep, and strategic renovation of these buildings, it becomes imperative to employ a suitable nondestructive testing and assessment technique for comprehensive surveillance aimed at early detection of hidden rebar corrosion. Infrared thermal wave imaging has arisen as a feasible method for the nondestructive examination and assessment of reinforced concrete structures. This is attributed to its ability to perform comprehensive, remote, and rapid inspections, facilitating the monitoring of subsurface rebar corrosion. The current section introduces an innovative approach known as Digitised frequency modulated thermal wave imaging (DFMTWI) within diverse thermal nondestructive testing methodologies. This technique is put forward to numerically test and evaluate rebar corrosion within concrete structures, and the obtained results are then compared with the frequency-modulated thermal wave imaging (FMTWI) results by taking signal-to-noise ratio (SNR) as a figure of merit.</p>","PeriodicalId":764,"journal":{"name":"Russian Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212934","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}