Determining the structure and properties of heat-resistant titanium alloys VT3-1 and VT9 obtained by electron-beam melting

Authors

DOI:

https://doi.org/10.15587/1729-4061.2022.265014

Keywords:

electron beam melting, intermediate capacity, heat-resistant titanium alloy, structure, mechanical properties

Abstract

This paper reports a comprehensive study that investigated the quality of heat-resistant titanium alloys VT3-1 and VT9 obtained by the method of electron beam melting (EBM). It is shown that EBM makes it possible to produce high-quality metal of ingots of heat-resistant titanium alloys VT9 and VT3-1.

Semi-finished articles were made in the form of bars from ingots obtained by the EBM method. It was established that in the macrostructure of the deformed metal there are no cracks, delamination, cavities, metal and non-metallic inclusions. The macrostructure of the metal of the bars corresponds to 4 points for the alloy VT3-1 and 4–5 points for the alloy VT9 on the 10-point scale of microstructures of instruction 1054-76. It was shown that the metal microstructure of forged bars of VT9 alloy consists of primary β grains with a continuous or intermittent α-rim along the grain boundaries 3–4 μs thick. The structure of the metal in the volume of grain – lamellar type with partially globularized plates of the α phase, plates of α-phase of close orientation form α colonies measuring 10–40 μs. The thickness of the α plates is 1–5 μs, between the plates or globules of the α phase there is a layer of β phase with a thickness of 1–2 μs. The microstructure of the deformed metal of titanium alloy VT3-1 consists of primary β grains, the volume of which contains colonies of lamellar α phases measuring 10–100 μs. The thickness of α plates is 1.5–3 μs, the layer of β phase in the intervals between α-plates is mainly 0.3–0.5 μs. The microstructure of semi-finished articles in the form of deformed bars of alloys VT9 and VT3-1 corresponds to type 4–6 according to the 9-type scale of the microstructure of instruction 1054-76. Studies of the mechanical properties of the obtained semi-finished articles have shown that they meet all the requirements of regulatory standards that are put forward by industry to the quality of the metal of heat-resistant titanium alloys

Author Biographies

Serhii Akhonin, E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

Doctor of Technical Sciences, Professor, Deputy Director for Scientific Work, Academician of the National Academy of Sciences of Ukraine

Department of Metallurgy and Welding of Titanium Alloys

Oleksandr Pikulin, E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

PhD

Department of Metallurgy and Welding of Titanium Alloys

Volodymyr Berezos, E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

Doctor of Technical Sciences

Department of Metallurgy and Welding of Titanium Alloys

Andrii Severyn, E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

PhD

Department of Metallurgy and Welding of Titanium Alloys

Oleksiy Erokhin, E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

Postgraduate Student

Department of Metallurgy and Welding of Titanium Alloys

Vitalii Kryzhanovskyi, LLC Scientific and production association HVYLYA

Postgraduate Student

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Determining the structure and properties of heat-resistant titanium alloys VT3-1 and VT9 obtained by electron-beam melting

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Published

2022-10-30

How to Cite

Akhonin, S., Pikulin, O., Berezos, V., Severyn, A., Erokhin, O., & Kryzhanovskyi, V. (2022). Determining the structure and properties of heat-resistant titanium alloys VT3-1 and VT9 obtained by electron-beam melting. Eastern-European Journal of Enterprise Technologies, 5(12 (119), 6–12. https://doi.org/10.15587/1729-4061.2022.265014

Issue

Vol. 5 No. 12 (119) (2022): Materials Science

Section

Materials Science

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Copyright (c) 2022 Serhii Akhonin, Oleksandr Pikulin, Volodymyr Berezos, Andrii Severyn, Oleksiy Erokhin, Vitalii Kryzhanovskyi

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