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- Article name
- Current trends in the development of powder metallurgy: design and production of heat-resistant alloys
- Authors
- LOGACHEVA A. I., , ailogacheva@yandex.ru, Open Joint-Stock Company "Kompozit", Korolev, Moscow region, Russia
RAZUMOVSKII I. M., , razigor43@gmail.com, JSC "Kompozit", Korolev, Moscow Region, Russia
BERESNEV A. G., , BERESNEV1961@yandex.ru, JSC "Kompozit", Korolev, Moscow Region, Russia
RAZUMOVSKII M. I., , razmikhail@yandex.ru, JSC "Kompozit", Korolev, Moscow Region, Russia
LOGACHEV I. A., , ivan@logachev.biz, Joint-Stock Company "Kompozit", Korolev, Moscow Region, Russia
MAR'IN S. S., , Sergei-Marin@mail.ru, Joint-Stock Company "Kompozit"; Leonov Moscow Region University of Technology, Korolev, Moscow Region, Russia
- Keywords
- powder metallurgy / heat-resistant alloys / alloying theory / grain boundaries / pores / coatings / additive objects
- Year
- 2021 Issue 2 Pages 29 - 40
- Code EDN
- Code DOI
- 10.52190/2073-2562_2021_2_29
- Abstract
- The results of the modern theory of alloying powder alloys and the effectiveness of the application of methods of numerical processing of microstructure images for the creation of new heat-resistant alloys are analyzed. In the field of alloy alloying theory, the main attention is paid to the principles of local changes in the chemical composition of grain boundaries (GB) in the compacted state to increase the cohesive strength of the boundaries. The article describes the methodology for calculating and experimentally determining the segregation coefficient of alloying elements and impurities on GB and the principles for selecting "low-alloying" elements that strengthen GB in alloys. As an example of the use of the theory, the results of tests of an experimental titanium alloy are given. It is shown that the quantitative analysis of the microstructure image in a scanning electron microscope allows optimizing the parameters of the γ-γ′-microstructure and increasing the durability and low-cycle fatigue of the powder alloy EP741NP. Special attention is paid to the quantitative analysis of micro porosity characteristics in protective coatings and the structure of objects obtained using additive technologies.
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