Registration Number
0224U001840,
(0121U108718)
, R & D reports
Title
Application of the physical plasticity characteristic to study the mechanical behavior of massive materials and coatings in a wide range of temperatures
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Застосування характеристики фізична пластичність для дослідження механічної поведінки масивних матеріалів та покриттів в широкому інтервалі температур.
Head
Yefimov Mykola O., Кандидат фізико-математичних наук
Registration Date
31-01-2024
Organization
Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine
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Creating a scientific approach to the ductility of metal alloys, which is determined by
mechanical tests. Develop a method for determining the physical plasticity of materials δ * in
depending on the degree of deformation ε in standard mechanical tensile and compressive tests, and
also develop a technique for constructing deformation curves δ * = f (ε) in addition to standard curves
σ = f (ε). Develop a theory of the influence of structural factors (grain size, dislocation density,
dispersion hardening, hardening by substitution elements), temperature and strain rate on
physical plasticity δ *. Find the correlation of physical plasticity δ * with elongation to failure δ
at standard mechanical tensile test for various groups of metal alloys. Develop the method of determining the mechanical properties (yield strength and ductility) of the surface layers of materials and coatings by hardness.
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The object of research is pure metals, metal alloys based on iron and aluminum in different structural states, strengthened surface layers of metal alloys and quasicrystalline coatings.
The aim of this work is to create a scientific approach and develop a methodology based on it to determine the dependence of physical plasticity of materials on the rate of deformation, temperature and structural factors (grain size, strengthening, density of dislocations) during standard tensile tests. Development of a methodology for determining the mechanical properties of surface layers of materials and coatings from hardness measurements.
Research methods include microhardness measurements in a wide temperature range, mechanical tensile and compression tests, tribological studies, optical, scanning and transmission electron microscopy, and X-ray diffraction analysis.
During the project, a corresponding correlation was found between physical plasticity and elongation to failure in standard mechanical tensile tests for different groups of metal alloys. The temperature dependence of physical plasticity for different types of materials was studied for the first time. It was experimentally proved that the actual strengthening of surface layers and coatings should be characterized not only by an increase in hardness, but also by an increase in yield stress.
The results of the project can be used to develop materials with specified mechanical properties, ensuring not only strength, but also specified plasticity. The economic significance of the work is due to the possibility to significantly reduce the number of experiments in the elaboration of new alloys using the developed theories.
Product Description
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Yefimov Mykola О.
Balkashynova Olena V.
Biakova Oleksandra V.
Vlasov Andrii О.
Voskoboinik Ihor V.
Holubenko Oleksii А.
Honcharova Iryna V.
Honcharuk Viktor А.
Hrinkevych Kostiantyn E.
Zadorozhna Hanna V.
Zakharova Nataliia P.
Kytranov Dmytro S.
Kuprin Viktor V.
Leplynsʹkyy Volodymyr V.
Lukianov Oleksandr I.
Milman Yulii V.
Melnyk Viktor Kh.
Muzyka Oleksii О.
Poperenko Tetiana V.
Semenov Mykola V.
Tkachenko Ivan V.
Tsyvilitsyn Vadym Yu.
Chuhunova Svitlana І.
Sharovskyi Andrii О.
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2024-01-31
