Titanium-based intermetallic alloy

Patent metadata

Field	Value
Publication number	US-10119180-B2
Application number	US-201515538119-A
Country	US
Kind code	B2
Filing date	Dec 14, 2015
Priority date	Dec 22, 2014
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

A titanium-based intermetallic alloy includes, in atomic percent, 16% to 26% Al, 18% to 28% Nb, 0% to 3% of a metal M selected from Mo, W, Hf, and V, 0.1% to 2% of Si, 0% to 2% of Ta, 1% to 4% of Zr, with the condition Fe+Ni≤400 ppm, the balance being Ti, the alloy also presenting an Al/Nb ratio in atomic percent lying in the range 1.05 to 1.15.

First claim

The invention claimed is:

1. A titanium-based intermetallic alloy comprising, in atomic percent, 19.3% to 26% Al, 18% to 24.3% Nb, 0% to 3% of a metal M selected from Mo, W, Hf, and V, 0.1% to 2% of Si, 0% to 2% of Ta, 1% to 4% of Zr, with the condition Fe+Ni≤400 ppm, the balance being Ti, the alloy also presenting an Al/Nb ratio in atomic percent of about 1.07.

2. An alloy according to claim 1 , comprising 20% to 22% Nb, in atomic percent.

3. An alloy according to claim 1 , comprising 23% to 24% Al, in atomic percent.

4. An alloy according to claim 1 , comprising 0.1% to 0.8% Si, in atomic percent.

5. An alloy according to claim 1 claim 1 , comprising 0.8% to 3% of M, in atomic percent.

6. An alloy according to claim 1 , comprising 1% to 3% Zr, in atomic percent.

7. An intermetallic alloy according to claim 1 , wherein:
the content of Al lies in the range 20% to 25%, in atomic percent;
the content of Nb lies in the range 20% to 22%, in atomic percent;
the content of M lies in the range 0.8% to 3%, in atomic percent; and
the content of Zr lies in the range 1% to 3%, in atomic percent.

8. A turbomachine including a part including an alloy according to claim 1 .

9. An engine including a turbomachine according to claim 8 .

10. An aircraft including an engine according to claim 9 .

Assignees

• Safran Aircraft Engines

Inventors

• Guedou Jean-Yves
• Franchet Jean-Michel Patrick Maurice
• Strudel Jean-Loup Bernard Victor
• Germann Laurent
• Banerjee Dipankar
• Kumar Vikas
• Nandy Tapash

Classifications

• C22F1/183

  of titanium or alloys based thereon · CPC title

• C22C14/00 Primary

  Alloys based on titanium · CPC title

• C22C1/0458

  Alloys based on titanium, zirconium or hafnium · CPC title

• C22C1/0491

  Chemistry & Metallurgy · mapped topic

• F01D5/28

  Selecting particular materials; {Particular measures relating thereto;} Measures against erosion or corrosion · CPC title