Features of Integrated Manufacture of Blade Workpieces from Eutectically Strengthened Titanium Alloys

An integrated process is considered for preparing gas turbine engine compressor blade workpieces made of alloy VT22, eutectically strengthened with titanium boride. The efficiency of two-stage extrusion for alloy of the Ti–TiB n system is demonstrated, with which in the first stage preliminary crush...

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Bibliographic Details
Published in:Metallurgist (New York) 2014-05, Vol.58 (1-2), p.141-148
Main Authors: Titov, V. A., Zlochevskaya, N. K., Kachan, A. Ya, Savchinskii, I. G., Vishnevskii, P. S.
Format: Article
Language:English
Subjects:
Blades
Characterization and Evaluation of Materials
Chemistry and Materials Science
Compacting
Eutectics
Gas turbine engines
Gas-turbines
Materials Science
Mechanical properties
Metallic Materials
Specialty metals industry
Titanium
Titanium alloys
Titanium base alloys
Ultimate tensile strength
Vanes
Workpieces
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Summary:An integrated process is considered for preparing gas turbine engine compressor blade workpieces made of alloy VT22, eutectically strengthened with titanium boride. The efficiency of two-stage extrusion for alloy of the Ti–TiB n system is demonstrated, with which in the first stage preliminary crushing of harder strengthening phase TiB n is provided by deformation under all-round compression conditions and large shear strains, and in the second stage there is direct extrusion of a blade vane under conditions close to isothermal. It is shown that the processes implemented provide an increase in workpiece mechanical property ultimate strength compared with a cast structure within the blade root by 10–16%, and by 17–20% within the body of the blade vane.
ISSN:0026-0894
1573-8892
DOI:10.1007/s11015-014-9883-5