HEAT TREATMENT OF EXPERIMENTAL SHEETS OF TITANIUM ALLOY VT22 (Ti-5Al-5Mo-5V-1Cr-1Fe)

10.25712/ASTU.1811-1416.2023.01.013

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
  • 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:

titanium alloys, microstructure, sheet rolling, mechanical properties, heat treatment

Abstract

Heat treatment of metastable β-titanium alloys essentially includes two stages: solid solution treatment in the β- or α+β-region and aging at lower temperatures. It has been experimentally shown that the optimal mechanical properties (ss ~ 1400 MPa, δ ~ 7.4 %) in sheet semi-finished products appears after hardening from a temperature of 780 ºС and subsequent aging at a temperature of 540 ºС for 4 hours. A certain instability of mechanical properties is noted, probably associated with inhomogeneity of hot deformation during rolling in the process of manufacturing sheets. The strength indicators are about 7 % higher for samples from the middle of a sheet, than for ones from other sections. As for the plasticity indicators it has a different pattern: for samples from the edge of the rolled sheet, plasticity is about 35 % higher than ones from other sections.

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Published

2023-03-31

How to Cite

Klassman Е. Ю. ., & Lutfullin Р. Я. . (2023). HEAT TREATMENT OF EXPERIMENTAL SHEETS OF TITANIUM ALLOY VT22 (Ti-5Al-5Mo-5V-1Cr-1Fe): 10.25712/ASTU.1811-1416.2023.01.013. Fundamental’nye Problemy Sovremennogo Materialovedenia / Basic Problems of Material Science, 20(1), 109–114. Retrieved from https://ojs.altstu.ru/index.php/fpsm/article/view/408

Issue

Vol. 20 No. 1 (2023): Fundamental’nye problemy sovremennogo materialovedenia (Basic Problems of Material Science (BPMS))

Section

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