Niobium metal alloy
In one embodiment of the present disclosure, a niobium metal alloy composition includes: a vanadium content in the range of about 1.5 to about 12 weight percent; a hafnium content in the range of about 5 to about 13 weight percent; a titanium or zirconium content or a mixture of titanium and zirconium content in the range of about 0.25 to about 2.5 weight percent; and a niobium content as a balance of the alloy.
1. A niobium metal alloy composition, comprising:
a vanadium content in the range of 5.75 to about 12 weight percent, a hafnium content in the range of about 5 to about 13 weight percent,
a titanium or zirconium content or a mixture of titanium and zirconium content in the range of about 0.25 to about 2.5 weight percent; and
a niobium content of about 77 to about 85 weight percent.
2. The niobium metal alloy composition of claim 1 , wherein the vanadium content is 6 to about 12 weight percent.
3. The niobium metal alloy composition of claim 1 , wherein the hafnium content is in a range selected from the group consisting of greater-than-5 to about 13 weight percent.
4. The niobium metal alloy composition of claim 2 , wherein the titanium or zirconium content or a mixture of titanium and zirconium content is in a range selected from the group consisting of about 0.5 to about 2.0 weight percent.
5. The niobium metal alloy composition of claim 4 , further comprising another alloying metal selected from the group consisting of tungsten, molybdenum, tantalum, rhenium, and combinations thereof.
6. The niobium metal alloy composition of claim 4 , wherein the alloy has a ductile-brittle transition temperature of less than −196° C. (−321° F.).
7. The niobium metal alloy composition of claim 4 , wherein the alloy has a specific yield strength at 2000° F. of greater than 90 ksi/lb/in 3 .
8. The niobium metal alloy composition of claim 4 , wherein the alloy has a specific yield strength at 2000° F. of greater than 100 ksi/lb/in 3 .
9. The niobium metal alloy composition of claim 1 , wherein
the vanadium content is 6 to about 9 weight percent;
the hafnium content is about 8 to about 13 weight percent; or
the titanium or zirconium content or a mixture of titanium and zirconium is about 0.7 to about 1.5 weight percent.
10. A niobium metal alloy composition, consisting of:
a vanadium content in the range of about 1.5 to about 12 weight percent;
a hafnium content in the range of about 5 to about 13 weight percent;
a titanium or zirconium content or a mixture of titanium and zirconium content in the range of about 0.25 to about 2.5 weight percent; and
a niobium content as a balance of the alloy.
11. The niobium metal alloy composition of claim 10 , wherein the niobium content is in a range selected from the group consisting of about 70 to about 90 weight percent.
12. The niobium metal alloy composition of claim 10 , wherein the vanadium content is in a range selected from the group consisting of about 2 to about 12 percent.
13. The niobium metal alloy composition of claim 10 , wherein the hafnium content is in a range selected from the group consisting of greater-than-5 to about 13 weight percent.
14. The niobium metal alloy composition of claim 10 , wherein the titanium or zirconium content or a mixture of titanium and zirconium content is in a range selected from the group consisting of about 0.5 to about 2.0 weight percent.
15. The niobium metal alloy composition of claim 10 , wherein the alloy has a ductile-brittle transition temperature of less than −196° C. (−321° F.).
16. The niobium metal alloy composition of claim 10 , wherein the alloy has a specific yield strength at 2000° F. of greater than 90 ksi/lb/in 3 .
17. The niobium metal alloy composition of claim 10 , wherein the alloy has a specific yield strength at 2000° F. of greater than 100 ksi/lb/in 3 .
18. A niobium metal alloy composition of claim 10 , wherein
the niobium content is about 77 to about 85 weight percent;
the vanadium content is about 5 to about 12 weight percent;
the hafnium content is about 8 to about 13 weight percent; or
the titanium or zirconium content or a mixture of titanium and zirconium content is about 0.7 to about 1.5 weight percent.