High temperature resistant TiAl alloy, production method therefor and component made therefrom

US10590520B2 · kind B2 · utility

Assignee

• MTU Aero Engines AG · DE

Inventors

• Wilfried Smarsly · Grasbrunn, DE
• Martin SCHLOFFER · Munich, DE
• Helmut Clemens · Leoben, AT
• Thomas Klein · Saratoga, US

Key dates

• Filing date: Jul 10, 2017
• Grant date: Mar 17, 2020
• Expiry date: Mar 2, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C30/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Described is a TiAl alloy which, besides titanium, comprises 42 to 48 at. % aluminum, 3 to 5 at. % niobium, 0.05 to 1 at. % molybdenum, 0.2 to 2.2 at. % silicon, 0.2 to 0.4 at. % carbon, 0.05 to 0.2 at. % boron, and optionally tungsten, zirconium and hafnium, as well as unavoidable impurities, and at room temperature has a microstructure which comprises globular colonies of lamellae of α2-Ti3Al and γ-TiAl, as well as silicide precipitates, and essentially no β phase. A method for producing a component made of this alloy is also described.