MULTIPLE ISOTHERMAL FORGING OF ALLOYS BASED ON NICKEL AND TITANIUM

10.25712/ASTU.1811-1416.2022.04.012

Authors

  • Ekaterina Yu. Klassman Institute for Problems of Superplasticity of Metals of the Russian Academy of Sciences, Stepan Khalturina Str., 39, Ufa, 450001, Russia https://orcid.org/0000-0003-1984-5137
  • Elvina V. Galieva Institute for Problems of Superplasticity of Metals of the Russian Academy of Sciences, Stepan Khalturina Str., 39, Ufa, 450001, Russia https://orcid.org/0000-0002-1074-6274
  • Vener A. Valitov Institute for Problems of Superplasticity of Metals of the Russian Academy of Sciences, Stepan Khalturina Str., 39, Ufa, 450001, Russia; Bashkir State University, Zaki Validi Str., 32, Ufa, 450076, Russia https://orcid.org/0000-0002-1349-6047
  • Ramil Ya. Lutfullin Institute for Problems of Superplasticity of Metals of the Russian Academy of Sciences, Stepan Khalturina Str., 39, Ufa, 450001, Russia https://orcid.org/0000-0003-4638-3206

Keywords:

nickel-based heat-resistant superalloys, titanium alloys, multiple isothermal forging, microstructure

Abstract

The study of the process of multiple isothermal forging as applied to titanium alloy and heat-resistant nickel-based superalloys has been carried out. According to the study results, it was shown that the initial coarse-grained structure of nickel-based suoeralloys is transformed into an ultrafine-grained structure with a grain size: for the EP741NP it is about 0.6 μm, for the EK61 it is about 0.3 μm, as for the VT22 titanium alloy it is about 0.38 μm. The microhardness values are increased by 34 % for the EK61, by 10 % for EP741NP and by 5 % for the VT22. Such data will make it possible to create a scientific basis for optimizing the conditions of obtaining an ultrafine-grained structure in workpieces, particularly in (EP741NP and EK61) nickel-based superalloy and VT22 titanium alloy, as well as their subsequent processing in the superplasticity conditions.

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Published

2022-12-26

How to Cite

Klassman Е. Ю. ., Galieva Э. В. ., Valitov В. А. ., & Lutfullin Р. Я. . (2022). MULTIPLE ISOTHERMAL FORGING OF ALLOYS BASED ON NICKEL AND TITANIUM: 10.25712/ASTU.1811-1416.2022.04.012. Fundamental’nye Problemy Sovremennogo Materialovedenia / Basic Problems of Material Science, 19(4), 532–538. Retrieved from https://ojs.altstu.ru/index.php/fpsm/article/view/322

Issue

Vol. 19 No. 4 (2022): Fundamental’nye problemy sovremennogo materialovedenia (Basic Problems of Material Science (BPMS))

Section

SECTION 2. METAL SCIENCE AND HEAT TREATMENT OF METALS AND ALLOYS