High-strength titanium alloy for additive manufacturing

US11920217B2 · kind B2 · utility

Assignees

• The Boeing Company · US
• VSMPO AVISMA Corporation · RU

Inventors

• Natalia G. Mitropolskaya · Moscow, RU
• Robert David Briggs · Auburn, US
• Catherine J. Parrish · São José dos Campos, BR
• Arash Ghabchi · Issaquah, US
• Matthew J. Crill · Mill Creek, US
• Michael Leder · Verkhnyaya Salda, RU
• Igor Puzakov · Verkhnyaya Salda, RU
• Alexey Zaitsev · Verkhnyaya Salda, RU
• Natalia Tarenkova · Verkhnyaya Salda, RU

Key dates

• Filing date: Aug 31, 2018
• Grant date: Mar 5, 2024
• Expiry date: Feb 7, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/25
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A titanium alloy for additive manufacturing that includes 5.5 to 6.5 wt % aluminum (Al); 3.0 to 4.5 wt % vanadium (V); 1.0 to 2.0 wt % molybdenum (Mo); 0.3 to 1.5 wt % iron (Fe); 0.3 to 1.5 wt % chromium (Cr); 0.05 to 0.5 wt % zirconium (Zr); 0.2 to 0.3 wt % oxygen (O); maximum of 0.05 wt % nitrogen (N); maximum of 0.08 wt % carbon (C); maximum of 0.25 wt % silicon (Si); and balance titanium, wherein a value of an aluminum structural equivalent [Al]eq ranges from 7.5 to 9.5 wt %, and is defined by the following equation: [Al]eq=[Al]+[O]×10+[Zr]/6, and wherein a value of a molybdenum structural equivalent [Mo]eq ranges from 6.0 to 8.5 wt %, and is defined by the following equation: [Mo]eq=[Mo]+[V]/1.5+[Cr]×1.25+[Fe]×2.5.