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Title of the article INFLUENCE OF SUBMICROSCOPIC STRUCTURE OF “COPPER — BERYLLIUM” ALLOY ON SERVICE CHARACTERISTICS OF ELASTIC SENSING ELEMENTS
Authors

TOLSTOY Aliaksandr V., Ph. D. in Phys. and Math., Assoc. Prof., Deputy Head of the Laboratory of Metallurgy in Mechanical Engineering of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section MATERIALS SCIENCE IN MECHANICAL ENGINEERING
Year 2024
Issue 2(67)
Pages 79–87
Type of article RAR
Index UDK 669.35-157:539.26
DOI https://doi.org/10.46864/1995-0470-2024-2-67-79-87
Abstract The dependence of the properties of elastic sensitive elements made of beryllium bronze on the modes of their heat treatment is studied. It is shown that the duration of aging significantly affects the value of nonlinearity
of elastic characteristic, hysteresis, shrinkage of elements and mechanical properties of membrane material (hardness, elastic limit). The relations between submicroscopic structure and properties of elastic elements
are established. The greatest nonlinearity of the elastic characteristic, hysteresis and shrinkage belong to elements subjected to short-term aging at 310–350 °С. With increasing duration of aging, the corresponding
values of the above parameters decrease. For aging temperatures 310–320 °С, the nonlinearity of elasticity characteristics reaches the minimum values after 4–5 h of aging, and for 340 °С — after 3 h. At 350 °С minimum values of nonlinearity are reached after aging duration of 45–60 min. From the obtained data it follows that from the point of view of obtaining the minimum hysteresis and nonlinearity characteristics of aneroid sensing elements made of bronze of БрБНТ-1,9Мг (BrBNT-1.9Mg) grade, heat treatment of membranes should be carried out according to the regimes of 1 h at 350 °С or 3 h at 340 °С.
Keywords beryllium bronze, elastic sensing elements, nonlinearity, hysteresis, shrinkage, aging
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