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- Article name
- Physics and chemical factors of heat resistance of alloys based on many refractory metals: an introduction to the problem
- 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
GUSAKOV M.S., , gusakov_m@mail.ru, Joint-Stock Company "Kompozit", Korolev, Moscow Region, Russia
- Keywords
- heat-resistant alloys / refractory metals / plasticity / Hume-Rothery rules / configuration entropy / cohesive strength / heterophase structure
- Year
- 2022 Issue 3 Pages 25 - 35
- Code EDN
- MAAJOG
- Code DOI
- 10.52190/2073-2562_2022_3_25
- Abstract
- The main criteria for the heat resistance of a new generation of heat-resistant alloys (HRAs) are formulated - high melting point Tm ? 2000 оC, deformability at room temperature and the ability to form a heat-resistant heterophase structure. The requirement of Tm ? 2000 оC leads to the need to develop alloys based on refractory metals and compounds, and one of the most promising areas for the development of such work is the creation of HRAs based on many refractory metals, which are included in the group of high-entropy alloys. It is shown that to fulfill the plasticity criterion, it is necessary to use refractory alloys in whose crystal structures the atoms are characterized by a completely metallic bond. The basis for alloying such alloys is a system (Ti, Zr, Hf) with a BCC lattice (b phase), for stabilization of which the alloys must be additionally alloyed with Ta and Nb. The physics and chemical properties of the solid solutions of the system (Ti, Zr, Hf) - (Ta, Nb) are analyzed by calculating the parameters of the Hume-Rothery, configuration entropy, cohesive strength, melting point, density, and evaluation of the propensity to cold fracture. Variants of heterophase structures in HRAs based on many refractory metals are considered.
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