Statistical Comparison of the Strength Properties of Titanium Alloys for Aviation Gas Turbine Engines

The temperature dependences of the strength properties of forgings made of pseudo-α and α + β titanium alloys intended for the production of aviation gas turbine engines are statistically studied. The ultimate tensile strengths of various are compared using cluster analysis, which allowed us to dist...

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Bibliographic Details
Published in:Russian metallurgy Metally 2021-06, Vol.2021 (6), p.784-788
Main Authors: Egorova, Yu. B., Davydenko, L. V., Kononova, I. S.
Format: Article
Language:English
Subjects:
Annealing
Aviation
Certification
Chemistry and Materials Science
Cluster analysis
Competitive Ability of Metal Products
Forgings
Gas turbine engines
Materials Science
Metallic Materials
Operating temperature
Polynomials
Quality
Room temperature
Temperature
Tensile strength
Titanium alloys
Titanium base alloys
Ultimate tensile strength
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Summary:The temperature dependences of the strength properties of forgings made of pseudo-α and α + β titanium alloys intended for the production of aviation gas turbine engines are statistically studied. The ultimate tensile strengths of various are compared using cluster analysis, which allowed us to distinguish four groups of alloys with approximately the same strength reduction intensity in the temperature range 20–600°C. The results obtained are used to develop polynomial models to estimate the typical values of ultimate tensile strength of stamped forgings (after standard annealing) as a function of the test temperature. Models are proposed to predict the ultimate tensile strength at various operating temperatures if the room-temperature ultimate tensile strength of an annealed semifinished product is known.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029521060136