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Determination of the pressure inside pores
https://doi.org/10.26896/1028-6861-2021-87-10-40-43
Abstract
Determination of the porosity, structural characteristics of pores, and gas pressure in closed pores is the most important part of assessing physical and mechanical properties of materials. The internal pressure inside the pore can be used in estimating the level of strength reliability of the porous volume of the product to optimize the technological processes of product manufacturing, control their structure and properties, and avoid the formation of cracks at the boundaries of the particles consisting the material. We present a method for calculating the internal pressure in a spherical pore that has arisen in the material of a product obtained using powder metallurgy or additive technologies. The proposed procedure for measuring internal pressure in a pore consists in application of an external pressure to the product, measurements of the displacements of the points on the pore surface, and calculation of the internal pressure from the difference between the displacements. In this case, the known solutions of the problem of the theory of elasticity regarding the deformation of a spherical cavity located in the center of a spherical hollow ball are used. The results obtained can be used to assess the properties and structure of the products obtained by additive technology and methods of powder metallurgy, as well as to improve the technology of their manufacture.
About the Authors
М. I. Alymov
A. G. Merzhanov Institute of structural macrokinetics and materials science, Russian Academy of Sciences
Russian Federation
Russian Federation
Mikhail I. Alymov
8, ul. Akademika Osipyana, Chernogolovka, Moskovskaya obl., 142432
S. I. Averin
A. A. Baikov Institute of Metallurgy and materials science, Russian Academy of Sciences
Russian Federation
Russian Federation
Sergey I. Averin
49, Leninsky prosp., Moscow, 119334
E. M. Morozov
National research nuclear university MEPHI
Russian Federation
Russian Federation
Evgeny M. Morozov
31, Kashirskoe sh., Moscow, 115409
I. V. Saikov
A. G. Merzhanov Institute of structural macrokinetics and materials science, Russian Academy of Sciences
Russian Federation
Russian Federation
Ivan V. Saikov
8, ul. Akademika Osipyana, Chernogolovka, Moskovskaya obl., 142432
F. F. Galiev
A. G. Merzhanov Institute of structural macrokinetics and materials science, Russian Academy of Sciences
Russian Federation
Russian Federation
Fanis F. Galiev
8, ul. Akademika Osipyana, Chernogolovka, Moskovskaya obl., 142432
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Review
For citations:
Alymov М.I., Averin S.I., Morozov E.M., Saikov I.V., Galiev F.F. Determination of the pressure inside pores. Industrial laboratory. Diagnostics of materials. 2021;87(10):40-43. (In Russ.) https://doi.org/10.26896/1028-6861-2021-87-10-40-43
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