List of publications in 2017, in which our clients describe examples of the use of our company's products:
Kotlyarov A.Yu., Efremov V.V., Kutovoj S.S., Deev A.A., Zhegalov I.N. Method of accuracy and productivity increase of round grinding. Russian patent № 2621495 (2017). eLibrary ID: 38265403
Abstract
Field: technological processes. Substance: method includes continuous monitoring of the abrasive wheel cutting ability when grinding on a cylindrical grinding machine using an acoustic emission (AE) sensor and automatic correction of the abrasive wheel with a change in its cutting ability. During the grinding process, the spectral distribution of the number of AE emissions and their peak amplitudes in the frequency spectrum range from 60 to 300 kHz is continuously monitored. Changes in these parameters reflect changes in the structure of macro- and microgeometric deviations of the abrasive wheel interacting surfaces and the details and processes of plastic deformation that develop in the course of reducing the cutting ability of the abrasive wheel. In this case, the automatic correction of the abrasive wheel is carried out by means of its electroerosive dressing by changing the voltage of the electric pulse generator power source supplied to the abrasive wheel in the range of 25…40 V and pulse frequencies in the range of 1…22 kHz. Effect: increased accuracy and productivity of the grinding process.
Matyunin V.M., Marchenkov A.Y., Stasenko N.A. (National Research University MPEI, Moscow). Specific Energy of Elastoplastic Deformation Required for Crack Formation at Indentation of Hardening Coatings. Inorg Mater 54, 1566–1569 (2018). DOI: 10.1134/S002016851815013X
Аннотация
Abstract Known methods for assessing the crack resistance of very hard or strengthened surface layers of materials by using a pyramid indenter are intended for the cases of the formation of radial cracks around the indent. However, at indentation of a pyramid into some types of hardening coatings, for example, made of titanium nitride, annular rather than radial cracks are formed around the indent. For this case of crack formation, we proposed to use the kinetic diagram of indentation for determination of the specific energy of elastoplastic deformation that is needed for the formation of the first visible crack. This energy can be used to compare the ability of the coating to resist crack formation of any kind
E. A. Novikov, V. L. Shkuratnik, R. O. Oshkin, M. G. Zaitsev (National University of Science and Technology MISiS, Moscow). Effect of the stress-strain state of sandy-clay soils on their thermally stimulated acoustic emission Soil Mechanics and Foundation Engineering. 2017. Vol. 54, No. 2. P. 81-86. https://link.springer.com/article/10.1007/s11204-017-9438-4 DOI 10.1007/s11204-017-9438-4. eLibrary ID: 41873827
Abstract
The thermally stimulated acoustic emission of samples of sandy-clay soils under a mechanical load was studied experimentally. The characteristics of the acoustic emission upon freezing and thawing of soils as a function of their content of clay and sandy particles as well as the magnitude of the load were determined. It was shown that different stages of the stress-strain state of soils can be identified according to the thermally stimulated acoustic emission parameters. A numerical thermo-acousto-emission criterion for evaluating the rupture rate of structural bonds in frozen soils upon their warming and the change of the stress state was developed
Permyakov V.N., Makhutov N.A., Sidelnikov S.N. Combined method of strain and stress research. Russian patent № 2611597 (2017). eLibrary ID: 38259710
Abstract
Field: oil and gas industry. Substance: invention relates to a technology for studying strains and stresses in constructions of hazardous production facilities of gas and petrochemical industry. ESSENCE: a brittle strain-sensitive porous coating with freon is applied to the detail surface, coating curing and structure loading are carried out, and the freon gas release zone from the porous coating (bubbles are bursting) and the direction of plastic stress during deformation using acoustic emission sensors are determined. The brittle strain-sensitive coating is made of a mixture containing epoxy resin, a hardener probe, gas freon R-22 in the following ratio, wt %: 65-84 epoxy resin, a hardener 14-33 probe, gas freon R-22 2-10. Effect: invention enables to determine the stresses and strains using brittle coatings at the very early stage, eliminating negative effect on the environment.
V. R. Skal’s’kyi, Z. Т. Nazarchuk, I. Ya. Dolins’ka, R. Ya. Yarema, T. V. Selivonchyk (Karpenko Physicomechanical Institute, Ukrainian National Academy of Sciences; Joint-Stock Company “Lviv Locomotive-Repair Plant”; Luts’k National Technical University). Acoustic-Emission Diagnostics of Corrosion Defects in Materials (a Survey). Part. 2. Corrosion Cracking of Metals. Applied Aspects of Application of the Method. Mater Sci 53, 431–443 (2018). https://link.springer.com/article/10.1007/s11003-018-0092-4 DOI: 10.1007/s11003-018-0092-4
Abstract
We analyze the results of investigations of the acoustic-emission diagnostics of corrosion defects in materials and establish the relationship between the total count, energy, amplitude of acoustic radiation and the corrosion cracking of steels and metal alloys. Examples of application of the acoustic-emission method to detection of corrosion defects of a series of industrial objects are presented
V. L. Shkuratnik, P. V. Nikolenko, A. E. Koshelev (Academician Melnikov Institute of Integrated Mineral Resources Development—IPKON, Russian Academy of Sciences, Moscow; Gazprom geotekhnologii, Moscow). Spectral Characteristics of Acoustic Emission in Loaded Coal Specimens for Failure Prediction. Journal of Mining Science. 2017. Vol. 53, No. 5. P. 818-823. DOI 10.1134/S1062739117052825. eLibrary ID: 35752298