Titanium-based alloy and article manufactured from same

EP4411010A4Pending Publication Date: 2025-09-24OTKRYTOE AKTSIONERNOE OBSHCHESTVO KORPORATSIJA VSMPO AVISMA
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Patent Information

Application Number
EP2022873266
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2021-09-27
Filing Date
2022-09-19
Publication Date
2025-09-24

AI Technical Summary

Technical Problem

Conventional low-alloyed titanium alloys used in engine components and exhaust systems lack sufficient high-temperature creep resistance and oxidation resistance, limiting their durability and performance at elevated temperatures and pressures.

Method used

A titanium alloy composition with specific ratios of aluminum, molybdenum, silicon, oxygen, nitrogen, iron, hydrogen, and optionally copper is developed, which enhances high-temperature strength, creep resistance, and oxidation resistance through the introduction of alpha- and beta-stabilizers, while maintaining process ductility and preventing embrittlement.

Benefits of technology

The alloy exhibits improved high-temperature creep resistance, oxidation resistance, and mechanical properties, enabling long-term operation without distortion and maintaining original material properties, as demonstrated by industrial testing and evaluation of mechanical properties and oxidation resistance.

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Abstract

The invention relates to nonferrous metallurgy, namely to the development of low-alloyed titanium alloys characterized by high-temperature strength and thermal stability, and can be used for manufacture of articles intended for long-term operation at high temperatures, namely components of exhaust systems of vehicle engines. Titanium alloy containing aluminum, molybdenum, silicon, oxygen, nitrogen, iron, hydrogen, with the alloy components taken in the following ratio, % wt.: Aluminium 1.5 to 3.0 Molybdenum 0.1 to 0.5 Silicon 0.1 to 0.6 Iron 0.2 max Oxygen 0.15 max Carbon 0.1 max Nitrogen 0.03 max Hydrogen 0.015 max Titanium and inevitable impurities - balance, which in one embodiment additionally contains copper 0.5 to 1.5% wt., and article made thereof. A technical result of the embodiment of invention is the production of titanium alloy characterized by a combination of high mechanical and performance properties, including a higher level of creep resistance, with capability of cold forming.
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Citation Information

Patent Citations

  • SU524848A1

  • Titanium alloy having excellent high-temperature oxidation and corrosion resistance

    US7166367B2